HomeMy WebLinkAbout10/04/2006 Env Bd Packet•
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City of Lino Lakes
Environmental Board Meeting
October 4, 2006
6:30 p.m.
AGENDA
1. CALL TO ORDER
2. APPROVAL OF MINUTES
3. APPROVAL OF AGENDA
4. OPEN MIKE
5. ACTION ITEMS
A. Natures Preserve /EAW
6. DISCUSSION ITEMS
A. Blue Heron Days /Earth Day /Recycle Day
B. Fall Restoration Projects
C Resource Management Planning Update
7. ADJOURN
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AGENDA ITEM 5 A
STAFF ORIGINATOR: Jeff Smyser
Env. Bd. MEETING DATE: October 4, 2006
TOPIC: Draft Environmental Assessment Worksheet
for Nature's Refuge
BACKGROUND
Nature's Refuge is a conservation development project that was the topic of a May 31
presentation to a joint meeting of the City Council and all the advisory boards. The site
lies north of Main Street, generally between Lake Drive and Wood Duck Trail. We do
not yet have a project application. We have a draft Environmental Assessment
Worksheet (EAW). Information gathered through the EAW process will inform the
design of the project before the submittal of a formal development application.
The EAW here is a draft. After discussion by the Environmental Board, we will revise
• the EAW and bring it to the City Council for a vote to distribute the document for public
comment. The public comment period lasts 30 days. After that, we will examine the
document to determine if we need additional information and /or if we should revise the
document.
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Then, the City Council will determine if potential impacts of the project are significant
enough to require the preparation of an Environmental Impact Statement. If not, the
Council will adopt a finding of no significant impact and the environmental review
process ends. The developer then will begin to prepare the final design of the project and
the application information.
When the City Council decides to distribute the EAW for public comment, it is not an
approval of the project. Nor is a recommendation by the Environmental Board an
approval of the project. We are following the environmental review process as required
by state statute and the rules of the Minnesota Environmental Quality Board (EQB). The
format and "questions" on the EAW form were prepared by the EQB.
RECOMMENDATION
Discuss the draft EAW, provide recommended revisions.
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Nature's Refuge
Conservation Development
Sections 4 and 5, Township 31N, Range 22W
Lino Lakes
Anoka County, Minnesota
ENVIRONMENTAL ASSESSMENT WORKSHEET
• DRAFT September 25, 2006
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Concord Ecological Engineering, Inc.
N6424 High Mound Road
Concord, WI 53178
Critical Connections Ecological Services, Inc.
14758 Ostlund Trail North
Marine on Saint Croix, MN 55047
Oakwood Land Development
1611 Hwy 10 NE
Spring Lake Park, MN 55432
Passe Engineering, Inc.
1611 County Highway 10 NE
Minneapolis, MN 55432
The 106 Group Ltd.
The Dacotah Building
370 Selby Avenue
St. Paul, MN 55102
Wenck Associates, Inc.
1800 Pioneer Center
PO Box 249
Maple Plain, MN 55359 -0249
Contributors
Table of Contents
I. Environmental Assessment Worksheet
II. Figures
• Figure 1:
• Figure 2:
• Figure 3:
• Figure 4:
III. Attachments
County map showing the general location of the project
U.S. Geological Survey 7.5 minute, 1:24,000 scale map indicating project boundaries
Aerial photo showing all wetland boundaries and rare plant locations
Aerial photo showing proposed site development plan
• Minnesota DNR Natural Heritage Database Review Letter (Attachment A)
• Traffic Study Report (Attachment B)
• Archeological Survey Report (Attachment C)
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Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document – September 25, 2006
Page 1
ENVIRONMENTAL ASSESSMENT WORKSHEET
Note to preparers: This form is available at httn: / /www.eub.state.mn.us. EAW Guidelines will be available in
Spring 1999 at the web site. The Environmental Assessment Worksheet provides information about a project that
may have the potential for significant environmental effects. The EAW is prepared by the Responsible
Governmental Unit or its agents to determine whether an Environmental Impact Statement should be prepared. The
project proposer must supply any reasonably accessible data for — but should not complete — the final worksheet.
If a complete answer does not fit in the space allotted, attach additional sheets as necessary. The complete question
as well as the answer must be included if the EAW is prepared electronically.
Note to reviewers: Comments must be submitted to the RGU during the 30 -day comment period following notice
of the EAW in the EQB Monitor. Comments should address the accuracy and completeness of information, potential
impacts that warrant further investigation and the need for an EIS.
1. Project title Nature's Refuge Residential Subdivision
2. Proposer
Contact person:
Title:
• Address:
City, state, ZIP:
Phone:
Fax:
E -mail:
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3. RGU:
Contact person:
Title:
Address:
City, state, ZIP:
Phone:
Fax:
E -mail:
Oakwood Land Development
John Peterson
President
1611 County Hwy 10 N.E.
Spring Lake Park, MN 55432
763 -780 -4996, 763 - 286 -3389 (cell)
Oakwood @ens.net
City of Lino Lakes
Jeff Smyser
City Planner
600 Town Center Parkway
Lino Lakes, MN 55014 -1182
651- 982 -2425
651- 982 -2499
jsmyser@ci.lino-lakes.mn.us
Contact person:
Title:
Address:
City, state, ZIP:
Phone:
Fax:
E -mail:
4. Reason for EAW preparation (check one)
EIS scooping (Mandatory EAWI Citizen petition
Richard S. Carlson Development
Richard Carlson
President/Owner
7671 Central Avenue N.E.
Fridley, MN 55432
763 - 786 -1218, 612 -703 -3575 (cell)
Carlsonfrdly @aol.com
RGU discretion Proposer volunteered
If EAW or EIS is mandatory give EQB rule category subpart number and subpart name:
The applicable mandatory EAW category is in Minn. R. 4410.4300, Subp. 19 Residential Development D: "250
unattached units or 375 attached units in a city within the seven - county Twin Cities metropolitan area that has
adopted a comprehensive plan under Minnesota Statutes, section 473.859..."
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
5. Project location County ',
E1/2 of Section 5 (excluding NW' /< of NE1/4, and SW''% of SW' %), Township 31N, Range 22W
Plus part of SW' /4 of NW1/4, Section 4, Township 31N, Range 22W
See maps for location (Figures 1 and 2).
Page 2
• County map showing the general location of the project - Figure 1
• U.S. Geological Survey 7.5 minute, 1:24,000 scale map indicating project boundaries - Figure 2
• Aerial photo showing all wetland boundaries and rare plant locations - Figure 3
• Aerial photo showing proposed site development plan - Figure 4
• Minnesota DNR Natural Heritage Database Review Letter - Attachment A
• Traffic Study Report - Attachment B
• Archeological Survey Report - Attachment C
0 wards or less to be published inn the EQB.Moni
Nature's Refuge is a conservation development project located in the City of Lino Lakes on Highway 14, consisting
of 278 proposed residential lots on 100 acres and 132 acres of conservation area, which will be restored and
maintained under a permanent conservation easement. The project will utilize City sewer and water services.
b. Give a complete description cif the proposed project and related new construction.' Attach additional she
necessary. Emphasize construction, operation methods and features that will cause physical manipulation of the'
environment or will produce wastes. Include modifications to existing equipment or industrial processes and
significant demolition,' removal or remodeling of existing structures. "Indicate the timing .and duration of
onstruction activitie
Overview
Nature's Refuge is a proposed conservation development that will create a new residential subdivision combined
with a wetland conservation area in the City of Lino Lakes. The subdivision will provide additional housing
capacity in the form of an infill development. The conservation area will restore and preserve valuable natural
resources by combining residential development with a large, high - quality existing wetland complex containing rare
plant species and communities. The project relies upon a strategy to create a nature preserve by enhancing (through
restoration and active management) a large area of higher - quality wetland as compensation for filling a smaller
acreage of lower - quality wetland.
Site Description
The proposed project site is located on Main Street (County Highway 14) in the City of Lino Lakes, west of County
Highway 23, and east of Wood Duck Trail (see attached maps, Figures 1 and 2). It is bounded by Main Street to the
south, Pine Street to the north, and existing residential neighborhoods to the east and west. Access can be gained via
a dirt field road entrance from Main Street west of Lino Lakes Elementary School. The 232.08 -acre, irregularly
shaped property occupies most of the E'h of Section 5. The Applicants propose to include a small portion of the
SW1/4 of the NW1/4 of Section 4, Township 31N, Range 22W, which is a 17.6 -acre publicly owned parcel known as
Woolan's Park. The park land is included in this proposal as part of the conservation area to be restored and
managed because it is contiguous with the wetland/woodland complex existing on the privately owned land. The
City Comprehensive Plan guides the site for Low - Density, Sewered Residential and Park land uses. The
northeastern portion of the site was previously platted under an earlier proposed development, but it will be re-
platted if this project goes forward.
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Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 3
The site consists of oak and aspen second - growth forests, planted pines, fallow agricultural fields, and wetlands of
varying type and ecological quality. A large wetland complex occupies much of the eastern portion of the site. The
complex includes rare wetland plant communities and several rare plant species. The property was farmed until
early last century, but since then has developed somewhat mature second - growth forest. The only current land uses
are unauthorized recreational uses, and two utility easements that cross the northern portion of the site. Drainage
ditches that were presumably dug during the site's agricultural period are still effective in connecting some of the
wetlands to each other and to the off -site drainage network.
Proposed Project
According to the project plan, the site will be divided into a residential area and surrounding nature - conservation
areas. The subdivision will be accessible from the south via an entrance from Main Street immediately west of Lino
Lakes Elementary School, and from the north via an entrance from Pine Street. An irregular network of new,
curbed, yet -to -be -named residential streets will be built along a roughly north -south axis to provide access to 278
newly platted lots. Sanitary sewer and water supply will be extended from existing infrastructure to service these
new lots. The streets will wind through the development, avoiding the majority of wetlands. The typical lot will be
rectangular and approximately 80' by 120', but the winding, irregular nature of the streets will mean that many lots
will have different dimensions and shape, though their sizes will be similar (see Proposed Site Plan, Figure 4).
The project will include restoration and management activities for the majority of the property's wetland area in
order to create conservation areas and to offset wetland impacts created by the project. Based in part on the
presence of rare plant species (see rare plant locations in Figure 3) and communities on the project site, the
Minnesota Board of Water and Soil Resources (BWSR) has already given verbal approval to apply the "Exceptional
Natural Resource Value" (ENRV) provisions of the Minnesota Wetland Conservation Act (WCA) to the wetland
impact mitigation plans for the project. Under these provisions, the Applicants will gain extra mitigation credits for
properly restoring the wetlands that support rare species and unique vegetative wetland communities. This will
provide enhancement and protection for a valuable natural area, while providing wetland mitigation credit to offset
the proposed wetland impacts created by the project, and excess mitigation credits that will be used as wetland
mitigation bank credit.
The proposed conservation areas will consist of non - impacted wetlands and adjacent forested upland areas. The
conservation areas will be placed under conservation easement, and will be restored according to a formal
restoration plan. The plan will include initial restoration activities, plus a 5 -year maintenance and monitoring plan.
Following this establishment period, the conservation areas will be preserved, and managed in perpetuity. The
funding plan for this ongoing management has not yet been determined, but will probably include a combination of
sources (e.g. escrow earnings, homeowner fees).
The project will include the creation and maintenance of pedestrian trails through the development. These trails will
be linked to the City's trail system as it develops. The trails will separate pedestrians from roadways, and will
traverse small portions of the conservation areas. The trails will be constructed to be compatible with the City's
"greenway" system.
Phasing and Construction Activities
The site will be constructed in multiple phases. The anticipated phasing is to begin at the south and proceed to the
north. All phases are anticipated to be complete in 3 to 5 years. Construction of the first phase (south of the main
drainage ditch) will possibly begin in late 2006. For each phase, the erosion control measures and storm water
ponds will be constructed first to provide sediment control during construction. Grading of the streets and home
sites will follow. Utility construction will be next, followed by street construction. Turf establishment and
infiltration areas will be installed as grading and street construction are completed. The construction activities
sequence will be in accordance with that specified in the particular phase's Storm Water Pollution Prevention Plan
(SWPPP).
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Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 4
Construction Actions
Because of the high water table on the site, grade will be raised over much of the build area, requiring imported fill
of 392,000 cubic yards and excavation of 97,000 cubic yards. Other excavation will be required for other
earthwork, utility installation, and street grading. Equipment to be used will consist of conventional earthwork
equipment, including on- and off -road trucks, backhoes, scrapers, compactors, track dozers, and graders typical of
activities such as timber removal, transport of fill material, grading, utility installations, and street improvements.
Connections to City sewer and water will be made at Main Street and will be extended into the property to serve it
up to Pine Street. A lift station will be required in the area north of Phase I.
Erosion Control
A SWPPP (Storm Water Pollution Prevention Plan) will be prepared to clearly state all required erosion control
practices. As noted above, silt fences will be placed before any earthwork begins. Proper grading techniques will
be used in the construction of the site. Best Management Practices will be employed during the construction of the
lots, roadways, and sedimentation ponds. Prompt seeding and mulching of completed areas will restore protective
turf as soon as possible. These protective measures will be monitored and maintained until final completion of all
construction activities.
Easements and Outlots
Drainage and utility easements will be provided along all lot lines. Outlots will be created for sedimentation ponds
and the majority of wetlands. Conservation easements will cover the conservation areas described below.
Right -of -Way and Streets
Public street rights -of -way will be 50 feet wide and will create approximately 18.5 acres of right -of -way area.
Approximately 16,300 lineal feet of curbed, paved streets will be constructed. The street pavements will be
constructed 28 feet wide (face -of -curb to face -of- curb), using ribbon curb in many places to reduce stormwater
runoff and increase infiltration. The pavement section will be built to City of Lino Lakes standards and will lie
within the right -of -way.
Drainage
The project will be built to handle all stormwater on -site using rain gardens, swales, and storm drains to retention
ponds, preventing excess discharge to wetlands. The goal will be to cause no net change to existing drainage
patterns in remaining wetlands.
Wetland Impacts
Out of 28 delineated wetlands on the site covering 93.3 acres, seventeen jurisdictional wetlands will be impacted
either partially or entirely, resulting in the fill of 7.5 acres of jurisdictional wetland. Impacts will include complete
fill of entire wetlands, small areas of fill at the edges of wetlands, and footings for constructed boardwalk crossings
for pedestrian trails. Mitigation will be part of the restoration and management plan in the conservation area.
Conservation development phases:
Approximately 1550 acres (including the —17.6 -acre public parcel) will be set aside as a conservation area (CA). No
construction activity will occur in these areas, except trail and boardwalk construction where the planned trails will
cross the CA. The entire CA acreage will be placed under a conservation easement at the beginning of the project.
Following that, it will be subject to an active restoration and management regime. The restoration tasks and
timelines will be designed to correspond with the ecological requirements of the proposed conservation area, and the
natural communities, flora, fauna, and rare species existing within. The systems to be restored are diverse fire -
dependent herbaceous systems, and restoration and management approaches will be designed to re- establish a more
natural disturbance regime (i.e. prescribed fire), reduce encroachment of woody species, manage exotic and invasive
species, and promote the proliferation of diverse herbaceous systems and rare native plant species. The plan will be
designed to: adequately document existing pre - restoration conditions, monitor improvements to the natural systems
as a result of restoration and management implementation, and justify the allocation of wetland mitigation credits
with sufficient monitoring data upon successful implementation of the restoration and management plan.
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Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 5
The restoration and management plan will take into account economic variables and constraints, and incorporate
cost - effective restoration strategies which invest significant economic resources in the early stages of the plan, and
transition to minor investments in the long -term. The restoration and management plan for the conservation areas
will be implemented in three phases. The initial phase will occur from Year 1 to Year 3, and will involve: 1) pre -
restoration survey to determine baseline vegetation conditions; 2) intensive methods of vegetative restoration, such
as tree and brush cutting, herbicide application, mowing, soil scarification, soil - surface scraping, and prescribed
burning; 3) collection and distribution of native plant seeds; 4) establishment of permanent monitoring plots; and 5)
placement of hydrologic monitoring wells. Most work will be conducted manually, but cutting and removal of
woody vegetation, mowing, scarification and scraping will be done with Bobcat track machines, chainsaws and
brush cutters.
The second phase will involve the same types of activities as the first phase, except that removal of woody
vegetation and soil - disturbing activities should no longer be necessary. In general, restoration activities will
decrease in frequency and number over time, as the community becomes more progressively restored to a desirable
condition. Hydrological and botanical monitoring will be maintained at a consistent level from project start through
the fifth year.
The third phase will be the long -term maintenance /preservation phase. Management activities during this phase will
be similar to those conducted in the previous phase, but only on occasion, as needed to ensure the long -term
preservation of the natural resource values of the conservation areas.
c. Explain the project purpose; if the project will be carried out by a governmental unit, explain the need for the
project and identify its beneficiaries.
The purpose of the project is to provide new housing capacity in the city of Lino Lakes, while simultaneously
ensuring long -term management and protection of valuable natural assets.
d. Are future stages of this development, including development on any outlots, planned or likely to happen?
Yes X No.
e. Is this project a subsequent stage of an earlier project? Yes X No
7. Project magnitude data
Total project acreage 232.08 (plus restoration within a 17.6 -acre city park, which totals 249.7 acres)
Number of residential units: Unattached 278 Attached maximum units per building
Commercial, industrial or institutional building area (gross floor space): total square feet
Indicate areas of specific uses (in square feet):
Office _ Manufacturing
Retail Other industrial
Warehouse Institutional
Light industrial _ Agricultural
Other commercial (specify)
Building height two -story, 35 ft. If over 2 stories, compare to heights of nearby buildings
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Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Permits' and approv
istance for the " project.
nd indirect forms of pi
Unit of Government
he
Anoka County
Board of Water and Soil Resources
City of Lino Lakes
City of Lino Lakes
City of Lino Lakes
City of Lino Lakes
City of Lino Lakes
FEMA
MN Pollution Control Agency
MN Department of Health
MN Pollution Control Agency
MN Dept of Natural Resources
MN Dept of Natural Resources
Rice Creek Watershed District
Rice Creek Watershed District
US Army Corps of Engineers
Metropolitan Council
Forest Lake School District 831
Page 6
List all known lcical, state and federal pennies, approvals and fmancial
od fcations of existing permits, governmental review of plans and all
financial
assistance bond guarantees, Tax Increment Financing and
Type of Application
Access Permit
ENRV - status approval memo
Rezoning
Preliminary Plat
MUSA Allocation
Final Plat
Engineering Plan Approval
Letter of Map Amendment or Revision
Storm Water Permit (NPDES)
Watermain Extension Permit
Sanitary Sewer Extension Permit
Threatened and Endangered Species
Temporary Water Appropriations Permit
Wetland Conservation Act Permit
Land Development Permit
Section 404 Wetland Permit
Sanitary Sewer Extension Approval
Design of Combined Access
Describe current and recent past land use and development on the
patii ility with adjacent and nearby land uses. Indicate whether any potentz
matters. Identify any potential environmental hazards due to past
or abandoned storage tanks, or proximity to nearby hazardous liquid or gas pt
Status
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Future Application
Pending Discussions
Discuss
involve
oil
The site consists of oak and aspen second - growth forests, planted pines, fallow agricultural fields, and wetlands of
varying type and ecological quality. Forest occupies the northern half of the site; treeless prairie /oldfield occupies
the south, and wetlands are dispersed throughout. The oak forests are fairly mature, with many large trees, snags,
and fallen dead wood. The aspen forest includes many mature trees, and aspen encroachment on wetland edges.
Open areas include oldfield/prairie- remnants in the central and southernmost portions, and an adjacent recent clear -
cut occupying much of the southwest portion on either side of the main drainage ditch (described below). Much of
the eastern/southeastern portion is a complex of contiguous wetland communities grouped as a single wetland
according to the wetland delineation prepared for the project. This complex, plus several others of the 28 delineated
wetlands, contain rare plant species (see Figure 3 for map of wetland locations and rare species locations; the large
complex is "Wetland 7 ").
The entire site was a farm many decades ago, as evidenced by historic photographs and several shallow drainage
ditches connecting a few of the wetlands to Wetland 7. A deeper drainage ditch in the southwestern part of the site
leads from Wetland 7 straight west to the site boundary, where it continues and connects to the ditch system that
ultimately leads to Marshan Lake. The duration of agricultural usage is not known, but aerial photographs indicate
that the most of the property was treeless and tilled until at least the 1930s. The irregularly- shaped central portion of
old - field/prairie, and the southernmost part near Main Street, remain treeless today, indicating probable recent
human use such as agriculture and/or homestead. Other recent land use includes clear- cutting in the southwestern
comer, so that portion of the site is now a highly disturbed recovering grassland with much bare soil. Also, two
buried - pipeline rights -of -way diagonally traverse the northern portion of the property. The site shows signs of
unauthorized recreational use, including some fairly well - established ATV trails, plus camping and hiking.
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document - September 25, 2006
Page 7
Lino Lakes, a formerly rural town, has undergone a transition from being a small town in an agricultural area to
being a suburb in the Twin Cities Greater Metropolitan Area. Thus, the site is surrounded by residential
neighborhoods with interspersed wetlands and forest. The surroundings are, like the site, former agricultural land.
The more open, rural character is now only evident in the area immediately northwest of the site, where there a few
larger, partly forested properties with few buildings. The majority of the surrounding land consists of residential
neighborhoods of moderate densities. Thus, the proposed development will bring the site into a condition more
consistent with its current surroundings, while providing a conservation area located among the existing
neighborhoods. Some forest and wetland patches on site are contiguous with small off -site patches, so some on -site
impacts may extend to off -site areas, but these are expected to be minor.
The project site is guided for Low Density, Sewered Residential and Park land uses, and is zoned Residential and
Rural. Most of the site is within the Metropolitan Urban Service Area (MUSA), including a previously platted (but
never built) area in the northeastern portion of the site. Thus, the project will not conflict with existing land use or
plans.
The only known environmental hazards from previous land use are the two buried pipelines in the northern portion
of the site.
10, Cover pes. Estimate the acreage of ti
development:
ach of t
follow
ver types before and aft
TOTE: Est mates .include the 17.6 -acre public parce
1-
Woodedlfore
Brush/Grassl
Cropland
Before
ands 93.3'.
91.4
65.0
0 '.
85.8'; Lawnilandscaping
40.4' Impervious surfaces;
21.4' Otler .(describe)
0 22.5
and ecologically sensitive r
a. Identify fish and wildlife resources and hab
by the project. Describe any measures to be tt
TOTA
ear tai
ize or av
49.
249.7
Existing Resources
The predominant habitat types on the site are oak forest, aspen forest, a limited area of planted pine forest, oldfield,
and a complex of wetlands. Two mowed pipeline rights -of -way, plus the recently cleared southern portion of the
property, provide very poor habitat value, although some animals (e.g. deer) may benefit from the forest -edge
habitat provided by these areas.
The project site includes approximately 91 acres of forest (-37% of site). The forest areas consist of second - growth
deciduous trees of various ages and a limited area of even -aged, planted conifers. Oak - dominant and aspen -
dominant stands are distinct. Maples, birch, ash, and elm are also common throughout the site. The forest is fairly
mature, with many larger trees, an open understory, and moderately abundant standing dead timber (snags). The
forest floor has abundant fallen dead wood and a moderately thick litter layer. This maturing condition with
somewhat diverse microhabitats could support a fairly good diversity of forest animals, (although the setting of the
site within a residential area within the City constrains potential wildlife species using the site to those that are fairly
well adapted to human activity and living environments). The snags provide good potential habitat for raptors,
woodpeckers, and cavity - nesting birds and mammals, while fallen timber can provide critical shelter for
salamanders, snakes, small mammals, and many invertebrates. The understory shrubs, including dogwoods,
European buckthorn (invasive exotic), spiraea, and hazel, occur in patches among more open- forest conditions. This
provides perching habitat and shelter for forest birds, while allowing open flyways and sightlines through the forest.
Small canopy openings (due to tree -fall) are not very common, but 23 of the site's wetlands are at least partly within
the forested area, providing canopy openings and dense herbaceous ground cover within and surrounding the
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 8
wetlands. The forest is also traversed by the buried pipeline rights -of -way (50' -60' wide) noted above. This likely
hinders movement by smaller forest animals, effectively separating the northeast and northwest corners from the
central forest expanse. The separation is not complete, and only is likely to affect some small, less - mobile, forest -
obligate vertebrates and some invertebrates (e.g. snails). At the same time, the rights -of -way act as corridors for
edge - loving species (e.g. deer and edge - nesting birds), and hunting/scavenging larger mammals (e.g. foxes), which
may include nest predators (e.g. raccoons) and brood parasites (e.g. brown- headed cowbird) that can disrupt hinder
reproduction in forest - nesting birds. Conversely, the east -west drainage ditch in the southwestern portion of the
property, with its forested buffer, provides a corridor through the logged area for more secretive forest - obligate
species. This corridor connects the large wetland complex ( "Wetland 7 ", see Figure 3) with the
forest/wetland/residential area to the west of the site boundary. In general, the interspersion of habitat patches and
attributes provides good habitat diversity and contributes positively to the general habitat quality of the forest.
There is a large non - forested upland in the southwestern portion of the site. This area actually consists of three
zones with different communities and land -use histories. All have been physically manipulated in the past and are
exposed to some human activity at present (Main Street traffic, the elementary school, the two homesteads at the
south property boundary and unauthorized recreational activity). The southernmost portion of the open area,
surrounding Wetland 25, is a fallow field containing early- successional oldfield plant species. Just north of this
zone is a recently logged zone surrounding Wetlands 21, 23, and 24, plus about half of Wetland 30 and a portion of
the edge of Wetland 7. All trees and shrubs were removed from this area stretching northward to Wetland 30,
excluding the above - mentioned wooded buffer strip along the main drainage ditch. The logged area is now a newly
recovering expanse of bare, disturbed soil and weedy pioneer and invasive species. Immediately north of the logged
area is an open grassland that may have been farmed in the past. It is covered by various later - successional oldfield
plant species. These non - forested areas provide habitats that range from poor to moderate. Only the northernmost
(north of the ditch) part has enough positive attributes (full, complex vegetative cover, embedded wetlands,
proximity to forest, and sufficient distance from human activity to be considered moderately good grassland habitat.
However, the presence of wetland basins south of the ditch enhances the habitat quality in that disturbed area.
The project site includes 93 acres of delineated wetland area, consisting of rich fen, poor fen, sedge meadow, wet
meadow, aspen and hardwood swamp, and shallow marsh (Types 1, 2, 3, and 7). The most common community is
wet meadow with relatively low vegetative diversity and quality, being dominated by reed canary grass and
encroaching quaking aspen. Several wetland communities include or are dominated by two or three sedge species
(i.e. Carex stricta, C. lasiocarpa, C. lacustris), and several include one or more state- listed rare species. Despite the
relatively low vegetative diversity, the wetlands provide medium to high quality wildlife habitat according to the
Minnesota Routine Assessment Method (MnRAM) because they are well distributed in a vegetated/wooded upland
matrix and most have wide, minimally disturbed buffers. A few wetlands have medium to high quality habitat
structure, with multiple plant communities and complex vertical structure (open water, emergent herbaceous, shrub,
and tree layers). Wetland 7 is distinct from the others because it is a large wetland complex consisting of many
different community/habitat patches. Half of the wetlands on the property provide amphibian breeding habitat of
high to medium quality (except Wetland 7 which is rated as having "Low" amphibian habitat quality because of a
possibility of predatory fish gaining access to it via the drainage ditch — see below).
A few wetlands (Wetlands 3, 4, 6, 7, 30) provide habitat potential for small fish (especially hypoxia- tolerant species
e.g. mudminnow, fathead minnow) because they are interconnected by drainage ditches and the whole complex is
connected to Marshan Lake through the drainage ditch system. However, only Wetland 7 is likely to have any
exposure to somewhat larger piscivorous fish at any time, if ever, because it is the only one directly drained by the
main ditch, and it has the largest and deepest inundated areas. Even so, it is unlikely that any fish larger than
minnows would be able to overwinter in the wetland.
Wildlife (or evidence thereof) observed within the project boundaries during site visits include deer (antler,
abundant tracks), squirrels, raccoon (tracks), chorus frogs (calling in almost all inundated wetlands in April), garter
snake, wild turkey, various songbirds (American goldfinch, American robin), ground- nesting marsh birds, abundant
green darner dragonflies. In previous years, sandhill cranes have been observed on the site. There is one DNR-
documented on -site occurrence of a state - threatened species, Blanding' s turtle. The record is from 1992, but the site
provides ample suitable habitat for the species, and it is within a region where the species is fairly common
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 9
Impacts
Implementation of the project would result in a 56% reduction of forest area, an 8% reduction of wetland area as a
result of filling, and a 66% reduction of grassland habitats (see table in Question 10 above). Further, a considerable
portion of remaining wildlife habitat boundary would be adjacent to the built areas of the development. This would
expose these boundary areas to risk of adverse impacts both during the construction phase and post - construction.
Construction -phase risks would include: 1) sediment transport from exposed soil surfaces into wetlands via water
and wind; 2) accidental spills (motor oil, chemicals); 3) damage from nearby use of heavy equipment; 4) high
construction- related noise levels disturbing wildlife. Sediment barriers and other Best Management Practices for
construction would be used to minimize these impacts.
Post - construction risks could include: 1) lawn chemical runoff from residential lots into wetlands; 2) road salt,
petroleum products, and other contaminant runoff from new streets into wetlands; 3) increased human access to
wetlands causing wildlife disturbance, litter, vegetation damage, and soil compaction. It is expected that project
drainage design would minimize or prevent the first two of these risks (surface -runoff related). The risks resulting
from increased human activity in the area would be ongoing. It may be partly mitigated by the presence of the
proposed new trails along the edges of the conservation area, which would tend to constrain human activity to the
trail and its immediate borders. Further, it is expected that by designating the wetlands as conservation areas,
unauthorized recreational uses may be reduced.
Long -term negative impacts to habitat quality would include permanent loss of interior forest habitat, fragmentation
of remaining forest, and new wildlife barriers hindering wildlife movement among habitat patches. There would
also be a net loss of wetland and grassland acreage.
Expected long -term positive impacts are a primary goal of the project. Habitat value of preserved wetland and
upland areas would accrue over time as the conservation areas are restored and managed. More than half of the
property would be designated as conservation area (wetland and upland), placed under conservation easement,
restored using active restoration methods, and managed in perpetuity. Thus, the remaining wetland habitats would
become higher - quality wildlife habitat than they are at present. Negative impacts to uplands would be partly
mitigated by the improvements resulting from restoration and conservation.
In the absence of the project's restoration and management plan, these wetlands can be expected to continue to
degrade as unregulated ATV -use within them continues, and as woody plant species continue to encroach,
converting wet meadows to shrub swamps and aspen swamps dominated by invasive plant species.
. Are any state- listed (endangered, threatened -or apecial concern) ',sot cies rare plant communities or
s nsitivei ecological resources such as tative prairie habitat, colonial waterbird nesting colonies regia
rare plant communities on or near the site? X Yes _ No "
If yes, describe the resource and:ho °it would be affected by the project. Indicate if a site surve
resources has been conducted and describe the results. If the DNR Natural Heritage and Nongame
program,has been contacted give the correspondence reference number: ERDB 20060543. 'Describe
to minimize or avoid adverse ham.
Y
y of
Research
eastires
Five Minnesota state- listed vascular plant species occur in the wetland portions of the site. These include one state -
endangered species (cross -leaf milkwort, Polygala cruciata), two state - threatened species (tooth -cup, Rotala
ramosior; lance - leaved violet, Viola lanceolata), and two state - special- concern species (autumn sedge, Fimbristylis
autumnalis; Clinton's bulrush, Scirpus clintonii). Of these five, Viola lanceolata is the most common and
widespread on the site, thus it would be exposed to the greatest impact. Polygala cruciata, on the other hand, is the
least common, having only been found in one location. The site was thoroughly surveyed, and all locations of these
species were recorded using sub -meter accuracy GPS technology, mapped (see Aerial photo showing all wetland
boundaries and rare plant locations, Figure 3), and reported to the DNR. These plants thrive in areas exposed to
•
•
•
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 10
intermediate levels of physical disturbance, and at present they can be found growing in and adjacent to ATV trails
in the wetlands. The project proposes to use more natural means of disturbance (e.g. prescribed burning) to
encourage these species.
The project was designed to minimize impact to these listed species, while restoring and conserving their habitat in
perpetuity. The areas planned for residential construction were selected to avoid direct impacts to the large majority
of known locations of listed species on site. A minority of identified locations of Viola lanceolata, and a smaller
number of Fimbristylis autumnalis and Scirpus clintonii locations, occur within the proposed construction zone,
requiring a DNR permit for taking these plants. Thus, these locations would be lost as habitat for these listed
species. However, this loss would be mitigated by the creation of a wetland conservation area that would include
most identified locations of these species, improve their habitat, and protect them in perpetuity. Under present
conditions, it can be expected that these species' habitat would continue to degrade as invasive woody and
herbaceous species continue to encroach on the wetlands, and as uncontrolled human use continues.
The DNR Natural Heritage Database records one 1992 sighting of Blanding's turtle (Emydoidea blandingii) in
Wetland 7 (see Minnesota DNR Natural Heritage Database review letter, Attachment A). Other sightings of this
species are not uncommon in the region. In fact, at a public hearing on this project a resident reported a recent
sighting on or near the project site. This species requires both wetland and upland habitats. Seasonal wetlands can
be good feeding habitat, but deeper basins with year -round surface water are habitat requirements. Thus, Wetlands
3 and 7 are the most important likely Blanding's turtles habitats on the site. Equally important is the upland
surrounding these wetlands, as this species lays eggs in sandy, vegetated upland areas adjacent to their usual wetland
habitats. Blanding's turtles frequently migrate overland between wetlands and nesting areas, and from wetland to
wetland, placing them at considerable risk when crossing roads. The proposed project would not likely adversely
affect wetland habitat for Blanding's turtles, but it could create additional risks to turtles moving overland because it
would place roads and other human habitats in close proximity to Wetlands 7 and 3. Mitigation of these risks would
include the conservation and improvement of upland areas surrounding these wetlands and buffering them from the
build area. Also, the use of ribbon curbs will prevent turtles from becoming trapped on roads by high curbs.
Nonetheless, the reduction of nesting habitat would restrict turtle nests to a fairly narrow zone near built areas,
possibly making them more vulnerable to nest predators, such as raccoons, that can be favored by human activity.
As recommended by the DNR, residents of the new subdivision would be informed via signage and flyers of the
importance of avoiding impacts to Blanding's turtles and their habitats.
12. Physics:
dredgin
involve the physic;
and impoundment
No
.tioi
such as
yes, 'identify water';souree.affected and give the DNR Protected Waters' Inventoiy numbers} if the
esources affected are on the Pi I NIA . Describe alternatives considered and proposed mitigation meal
hinimize impacts.
The existing drainage area was estimated based upon the 2 ft contours supplied by the City of Lino Lakes as
developed by Markhurd and Associates. This was based upon a flight and ground survey performed in the fall of
2005. In addition, available site specific survey information from E.G. Rudd was used to supplement this
information to determine internal drainage boundaries and selected aerial photographs and the Anoka County soils
map were reviewed. There are no MN DNR Protected Waters Wetlands on the property. The general landscape
drainage is to the southeast, but most of the site is actually drained through constructed drainage ditches that connect
several wetlands and lead westward past the west site boundary into the ditch system that turns southward and
eventually southeastward to Marshan Lake.
Pre- Settlement Conditions
The site is the headwater of the watershed within the Anoka Sandplain. Unlike many other headwaters, this
drainage is dominated by a groundwater system, is very flat, and lacks a naturally formed drainage network. The
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 11
pre - settlement conditions likely did not include a surficial outlet from the area and the system developed over time
as a series of landlocked basins.
Historic Anthropogenic Impacts
Activity at the site that has impacted the site and contributing watershed hydrology includes:
• clearing / timber harvest
• development including roadway networks, school, residential, commercial
• agricultural activity
• development of an outlet ditch from the large wetland complex and a large wetland within the site
• construction of downstream ditch crossings (by others)
• fire suppression (which modifies the vegetative cover)
• internal unpaved roadway and all- terrain vehicle (ATV) trails
Historic aerial photos indicate the wetland complexes were cut for hay in the late 1930's and all but small patches in
the northeastern 80 -acre parcel were deforested for agriculture. Much of the area has reforested naturally and some
areas have been planted. The majority of the southwestern 80 -acre parcel was cleared in the last 5 years by the
previous owner. There is no known internal tiling or subsurface drainage network on the site.
Existing Conditions
Drainage Area - The existing landform is very flat. The large wetland complex is enclosed by a 904 contour at
approximately 52 acres. However, the 906 contour does not close anywhere in the vicinity and loops north of Pine
Street, south of Main Street and west of Wood Duck Trail. It appears to extend over a square mile.
In addition, it appears there are two surficial outlets to the system. Specifically, to the southwest via the private
ditch and overland to the west and eventually to the judicial ditch system CD # 10- 22 -32. The site is shown to be
partially within subwatersheds MRC1 and MRC3 as defined by the Rice Creek Watershed District. However,
review of the recently available 2 ft contour data indicates there is significant opportunity for interbasin transfer and
a very subtle overland drainage divide. As previously described local infiltration is a significant component of the
surficial stormwater drainage the area.
Based upon this understanding, the following conclusions have been made:
• A conventional stage - storage routing of stormwater discharge is a relatively academic exercise based upon the
existing topography and watershed characteristics
• A planning flood elevation for the large wetland complex has been developed for the RCWD and the City of
Lino Lakes. However, this elevation must be considered within the context of the assumptions and method
limitations. The incremental impact analysis is not considered a regulatory elevation, but rather presented for
information and general planning purposes only. The regulatory flood level will need to be revised and
established based on the grading plan for the project.
• It is considered very unlikely that the flood elevation of any of these basins would reach 906.
• Based upon the characteristics of the watershed and the basin, it is considered that the proposed development
activity will not raise the regional flood elevation.
Proposed Conditions:
The project will include alterations to surface water features on the property including the filling of wetlands and the
construction of a new roadway crossing of the outlet ditch. The general objectives of the stormwater management
for the site have been identified as follows
General Project Objectives:
• Enhance the wetland community that will sustain the threatened and endangered vegetation / retain function of
natural system
• Maintain existing hydrologic regime as much as practicable
• Maintain physical context of wetland complex
• Maintain existing biochemical environment for threatened and endangered species as much as practicable.
•
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 12
General project approaches have been utilized to meet these objectives and include:
• Develop understanding of local water table system, collecting data regarding existing water table elevations,
soil properties, and surficial hydrology.
• Develop a hydrologic model to evaluate existing and proposed conditions.
• Control the source of pollutants and develop facilities that will treat the surface runoff prior to entering sensitive
areas.
• Distribute (as opposed to centralizing) runoff and providing storage and treatment near the source.
Among the design elements considered will be micro - grading lots, retention of buffers, maximizing overland flow
routes, minimizing grading limits, construction of treatment systems, examination of lot sizes and locations.
Specific project design elements include:
• A revised roadway section that eliminates conventional curbing and allows sheet flow into an open swale that
will provide infiltration and treatment of stormwater
• Small sedimentation basins to provide additional treatment prior to discharge to constructed "rain gardens"
• Infiltration basins and stormwater ponds within the property limits
• Construction staging and control to minimize impact to local infiltration capacities especially at areas of
identified treatment facilities.
The new roadway crossing at the outlet of the large wetland complex will be constructed to allow adaptive
management options such as potential drawdown to accommodate burning activity and/or mimic drought conditions
or react to changes in the hydrologic regime. The peak discharge rates to downstream will be consistent with
RCWD requirements. Placement of the control structure and subsequent adjustments to water level will follow all
permitting requirements of the Rice Creek Watershed District and other authorities. An element of the process for
reviewing the wetland mitigation plan for the project will include determining the public agency that will have
responsibility for management of the control structure and water level.
late ,use. Will 1
xy pubic water
e project involve installation
pply or appropriation of any
section to or changes in
including dewatering)? X yes No
f yes, as applicable, give location and purpose of any new wells; public supply affected, changes to
and water quantities to be used; the source, duration, quan tity and purpose of any appropriations; and unique
well numbers and DNR', appropriation permit numbers, if known. Identify any existing and new wells on the site
ap. If there are no wells known on site, explain methodology used to determine,
There are no known project wells on the site. Any wells discovered during construction will be sealed by a licensed
well contractor in accordance with Minnesota Rules Chapter 4725. If required for construction, dewatering will be
performed in accordance with a permit obtained from the Minnesota DNR.
A temporary water appropriations permit will likely be needed for the excavation of material for the development of
ponding areas and as a local borrow site. Eleven (11) piezometers have been installed on the site in April 2006. A
data logger has been installed on one piezometer and on the ditch outlet to measure water level fluctuations. The
other wells have been read periodically and show a general gradient to the south. Local groundwater has fluctuated
over a foot to date in some of the piezometers. These piezometers can be potentially maintained as practicable to
monitor the impact of dewatering activities as part of the Mn/DNR Appropriations Permit process.
The project will connect to previously constructed municipal watermains, so the 278 expected new homes, would
draw water from the City water supply. Thus, assuming usage of 275 gallons per residential unit per day, the project
will ultimately require an estimated 76,450 gallons of water per day when all the planned homes are constructed and
occupied.
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
14. Water- related land use management district. Does any p
district, a delineated [100 -year flood piir or estate of tederaly de
dis X Yes No
yes,:identii+.tlte- district and
projec
ignated wild
Page 13
lve a shoreland zoning
nic river land'' use
Er s
project compatibility with district land use
A portion of the property includes an area with a surface flood hazard area (SFHA) identified as an approximate
study area (Unnumbered A Zone) that does not have a previously determined base flood elevation (BFE). The Rice
Creek Watershed District has done a study of the regional drainage system, but the basin within the property was not
included in that study. The City has not performed a detailed hydrologic study of the basin.
The property is not part of a wild or scenic land use district and not within a shoreland overlay district.
According to the FEMA Flood Insurance Rate Map, a portion of the site surrounding the main drainage ditch and
Wetland 7 is within the 100 -year flood plain surrounding the main east -west drainage ditch. The project is designed
to minimize impacts within the floodplain. The only proposed construction within the floodplain are: 1) one street
and two pedestrian trails will cross the floodplain and ditch, and 2) the rear portions of 8 lots will lie within the
floodplain boundary.
The project will necessitate changes to the flood plain boundary. Flood elevation will be established based on the
final grading plan for the project. Any floodplain fill proposed will be compensated for. Building and temporary
equipment- storage elevations will be determined based on the new floodplain contour. It is probable that the FEMA
map will need to revised (Letter of Map Revision or LOMR) or amended (Letter of Map Amendment or LOMA).
15. 1
ater surfaee u
yes, indicate t
th other uses.''
e project change the nu
and projected watercra
or type of
ge and di
afl on any aterbody? ''Yes X' No'
iy potential overcrowding or conflicts'
There are no navigable water bodies on the project site, and none will be created by the project.
sedim
ribe any si
. Give the acreage to be
slopes or highly erodible
control measures to be used d
sd the cubic yards of soil to be
It the site map. Describe any
xon.
The estimated area to be graded is approximately 100 acres. Because of the high water table in the upland portions
of the site, grade in the build area will be raised 4 to 6 feet to ensure that building elevations are high enough to
avoid water - table- related problems. Thus, an estimated 392,000 cubic yards of imported fill material and an
estimated 97,000 cubic yards of on -site excavation and fill will be needed. The majority of the material will not be
excavated on -site because most non -build portions of the site will be designated as conservation areas and placed
under a conservation easement. Excavation of such areas would be counterproductive in view of the long -term
restoration goals for the site. Thus, most fill material will be trucked in from off -site sources.
There are no existing steep slopes or highly erodible soils on the site. With the exception of street embankments at
the proposed wetland impacts and storm water pond banks, no steep slopes will be constructed on the site.
Erosion and sedimentation control measures will follow the Storm Water Pollution Prevention Plan (SWPPP) to be
developed for the site. The SWPPP will include the incorporation of Best Management Practices (BMPs) as
prescribed by the MPCA and required by the City of Lino Lakes and Rice Creek Watershed District. The granular
nature of the soils in the Anoka County area has created issues with wind erosion from construction sites. These
problems generally occur when there is a combination of unfavorable conditions that include large areas of exposed
soil, hot, dry, windy weather, and improper construction practices such as insufficient silt fence, insufficient dust
•
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 14
control measures for construction traffic, and lack of phased turf establishment. BMPs to reduce the potential for
wind erosion during construction will be implemented. Water erosion will also be controlled through BMPs,
including prompt turf re- establishment on graded areas (de- compacting, mulching, and seeding), and reduction of
sediment transport by using silt fences, ditch checks, stone exit pads, and storm sewer inlet protection. The project
will be constructed in phases and the aerial extent of exposed grading will be minimised. Infiltration facilities will
be protected during the construction phase to ensure they are not compacted by construction activities that will
decrease the infiltration capacity or filled with local sediment runoff during the construction phase.
17. Water qual
y: surface water. runoff
quantity and quality of site rani
atrunoff. 'Describe any stormwate
d after the project, Describe l
The effects of residential land use on the groundwater quality in the Anoka Sand Plain is described in USGS Water
Resources Investigations Report 93 -4074 entitled "Effects of Agricultural and Residential Land Use on Ground -
Water Quality, Anoka Sand Plain Aquifer, East Central Minnesota ". This report shows that conversion to
residential land use has a tendency to increase chloride, sodium, hardness (CaCO3) and other constituents. In
addition, phosphorus is considered a pollutant of concern and is generally associated with lawn care.
Source control
Since the development will be connected to city sewer systems much of the impact will be reduced and the sources
will be from `non - point' sources. The development will require zero - phosphorus fertilizer be applied for established
lawns and will be administered through homeowner covenants.
Treatment
Treatment of stormwater will focus on treatment near the source that will increase the amount of infiltration and
contact with the soil medium prior to discharge to downstream resources. The use of ribbon curb in selected areas
will allow drainage from paved surfaces into open swales. Drainage into swales, rain gardens, and sedimentation
basins will treat the stormwater prior to discharge to the large wetland complex and downstream resources. The use
of rain barrels to capture and treat rooftop runoff will be encouraged throughout the development.
Infiltration areas will be designed and installed in accordance with the MPCA requirements in Permit No. R100001.
Skimming measures will be used to protect downstream water quality. If runoff modeling so indicates, rate control
measures will be used in the ditch outlets to limit the post - development runoff rates to that of the pre - development
conditions. Conversely, the site grading and pond discharge structures will be designed such that the post -
development runoff rates do not decrease the runoff supplied to the wetlands. The treated runoff will be released to
the existing wetlands to minimize the potential of adversely affecting the value and function of these wildlife
resources.
The rain gardens will serve primarily to meet water quality requirements as well as provide some rate control. The
ponds will be designed primarily to provide rate control and temporary storage for a 100 -year storm event. Water
quality will also be protected by these ponds and the above - mentioned skimming measures.
b. Identify rou,
ue11 as
d recei
ate rec
e sites include major downstream
on the quality of receiving waters.1',
at bodie
As described above in Section 12, the landscape generally drains toward the southeast, but the site drains through
the county ditch system that routes stormwater off -site to the west, and ultimately to Marshan Lake about two miles
south- southwest of the project site. The focus of the stormwater management plan will be to sustain the ecological
function of the large wetland complex contained within the site. The implementation of the stormwater treatment
systems described herein will minimize the impact to downstream resources. Thus, the overall quantity of runoff is
estimated to remain approximately the same as a result of the design of the project's runoff and infiltration system.
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 15
18. Water quality: wastewaters
a. Describe sources, composition and quantities of all sanitary, municipal and industrial wastewater produced or
treated at the site.
The wastewater generated will be domestic strength sewage from the homes on the site. Assuming usage of 275
gallons per residential unit per day, the project will ultimately generate 76,450 gallons of wastewater per day.
b. Describe waste treatment methods or pollution prevention efforts and give estimates of composition after
treatment. Identify receiving waters, including major downstream water bodies, and estimate the discharge
impact on the quality of receiving waters. If the project involves on -site sewage systems, discuss the suitability
of site conditions for such systems.
The project will be served by municipal sewer mains installed along the centerline of the proposed streets. These
mains will connect to a lift station, and sewage will be routed through existing infrastructure to be treated by the
Metropolitan Council treatment plant.
No individual sewage treatment systems (ISTS) would be approved by the City of Lino Lakes for the project. No
on -site pre - treatment measures are proposed.
c. If wastes will be discharged into a publicly owned treatment facility, identify the facility, describe any
pretreatment provisions and discuss the facility's ability to handle the volume and composition of wastes,
identifying any improvements necessary.
The sewage from the site will be treated at the MCES Metro wastewater treatment facility located in St. Paul. There
are no facility improvements needed to treat wastewater generated by the project.
d. If the project requires disposal of liquid animal manure, describe disposal technique and location and discuss
capacity to handle the volume and composition of manure. Identify any improvements necessary. Describe any
required setbacks for land disposal systems.
This project does not involve liquid animal manure.
19. Geologic hazards and soil conditions
a. Approximate depth (in feet) to ground water: 0 minimum 8 average
to bedrock: 100 minimum 125 average
b. Describe any of the following geologic site hazards to ground water and also identify them on the site map:
sinkholes, shallow limestone formations or karst conditions. Describe measures to avoid or minimize
environmental problems due to any of these hazards.
There are no known hazards related to these geologic conditions.
c. Describe the soils on the site, giving NRCS (SCS) classifications, if known. Discuss soil granularity and
potential for groundwater contamination from wastes or chemicals spread or spilled onto the soils. Discuss any
mitigation measures to prevent such contamination.
The Soil Survey of Anoka County identifies ten soil map units in the project site. The distribution of soil map units
is fairly even throughout the site, with no particular units being predominant. The soils on the site are generally
sandy loams with peat in the lowest wetland areas. The following is a summary of the soils identified in the Soil
Survey:
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Soil Name (Symbol)
Hayden Fine Sandy Loam (T)
Blomford Loamy Fine Sand (N)
Peat (P)
Bluftom Loam & Silty Clay Loam (Bc)
Hayden Fine sandy Loam (Td)
Ames Fine Sandy Loam (Ys)
Isanti Loamy Fine Sand (Is)
Braham Loamy Fine Sand (Nu)
Lino Loamy Fine Sand (L)
Anoka Loamy Fine Sand (Gu)
Depth to High Groundwater (ft)
6 to l0
2 to 4
0 to 1
1 to 2
6 to 10
1 to 2
0.5 to 1
2 to 4
2 to 4
3 to 5
Slopes ( %)
2 to 7
0 to 2
0 to 2
0 to 2
7 to 12
0 to 2
0 to 2
2 to 7
0 to 2
2 to 7
Page 16
The soils on the site are susceptible to groundwater contamination if significant quantities of wastes or chemicals
were discharged on to the ground. The proposed residential use of the site, however, is not anticipated to generate
wastes or chemicals that have the potential of contaminating the groundwater. The type of spill that could be
somewhat more likely would be a spill from equipment fueling during construction. This soil, if contaminated, will
be transported to a licensed hazardous waste reclamation facility.
olid wastes
Des
, hazardous wastes, storage tanks
cribe types, amounts and compositions of solid or hazardous wastes
ash, produced during construction and operation. Identify meth
ejects generating municipal solid waste, indicate if there is a source separation p
ill be modified for reeYuling. If hazardous waste is generated, indicate
inimizotton plan and routine hazardous waste reduction assessments
20. S
a.
adge and
b Ai
rid
ng solid smirnal manure
location of disposal' For
describe how the project
e is a hazardous waste!
The residential development will generate normal types and amounts of solid waste. The development is not
expected to generate hazardous wastes. The solid waste will be collected by private haulers and disposed in
landfills. The landfills have sufficient remaining capacity to receive solid waste from this project. Recycling
services, which are required by the City, are provided by private solid waste haulers in the area.
b. Identii
event
;te, disc
c or ha
im contaminat
ge or e:
gals to be, use
.dwater. Ifthe use of ti
iy alteztives'considt
the site and identify measures to `be used to'.
hazardous materials will lead to a regulated'
minimize or eliminate the waste, discharge
Chemicals, fuel, and other petroleum -based products related to construction operations may be temporarily stored on
portions of the site during the construction period. These and other toxic and hazardous materials will be removed
from the site in a safe manner. Soil in the area of such materials, if significantly contaminated, will be removed and
disposed of properly. Building products used for home construction will be used, stored, and disposed of properly.
numner, : oca€tion
s, except water. D
id use of any above or below ground to
ny emergency response containment p1
store petrol
or
No above or below ground petroleum- product storage tanks are now located on the site, and none will be placed
above or below ground as part of the project. Small spills from equipment fueling may occur during construction.
Hydraulic oil could be discharged onto the ground if a hydraulic hose on a piece of construction equipment would
fail. Equipment will be parked in designated areas during non -work hours. These areas will also be used for fueling
and servicing, and will be in upland locations, away from wetlands. Impoundment dikes will be constructed to
contain fuels if a spill should occur. Soil, if significantly contaminated, will be removed from the site and taken to a
licensed hazardous waste reclamation facility.
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
21. Traffic. Packing spaces added public spaces, 278 private driveways when new homes are built . Existing''
spaces (if project involves expansion) 0 .. Estimated total average daily traffic generated 2,660 vehicles . Estimated
maximum peak hour -traffic generated (if known) and time of occurrence 1 one hour between 4:00 PM and 6:00
. Provide an estimate of the impact on traffic congestion on affected roads and describe any traffic
improvements necessary. If the project is within the Twin Cities metropolitan area, discuss its impact on the regional
system.
Page 17
Access to the project site would be off of Main St. (CSAH 14) and Pine St. These two roads differ greatly in their
construction, function, and needs.
Pine St. is a city street and currently is surfaced with aggregate. Pine St. forms the border between the Cities of Lino
Lakes and Columbus (formerly Columbus Twp.). The two municipalities have discussed paving Pine St., though
the issue was not resolved. The construction of the Nature's Refuge project would add a small number of vehicle
trips to Pine St. Perhaps a more important issue is that Pine St. provides a second access to the new neighborhood.
Pine St. should be paved. This will require cooperation between the two cities and will involve financial
participation by the developer of Nature's Refuge. The specifics are yet to be worked out.
Main St. (CSAH 14) access raises more complex challenges. The functional classification of CSAH 14 is principal
arterial. Minimizing the number of access points is an important factor in maintaining mobility and improving
safety. Anoka County, in partnership with numerous municipalities and agencies, prepared an access management
study for CSAH 14 in 1999, and Lino Lakes adopted it in 2000. The study envisions a four -lane divided road with
turn lanes at public intersections. Full access points are to be '/2 mile apart (2640 ft.). Other accesses are to be
planned as right Wright out accesses, with a minimum spacing between them of 880 feet (1/6 mile). The County's
2003 development standards also require spacing of mile between full accesses and 'A mile (1320 ft.) between
secondary accesses, and the secondary accesses are right in/right out.
The access management study designates Wood Duck Trail as a full access as well as CSAH 23 (Lake Drive). The
proposed Nature's Refuge access point is approximately 1800 ft. from CSAH 23 and 1600 ft. from Wood Duck
Trail. This meets the spacing criterion for a secondary access (right in/out), but not for a full access. In order to the
project to utilize Wood Duck Trail for access, it would require the acquisition of right of way through an existing
residential property. The developer informed City staff that he contacted those property owners and they were not
interested in selling such a right of way.
Lino Lakes Elementary School, east of the project site, has two driveways onto CSAH 14. The 1999 access
management study labels these driveways "no change" regarding access. These driveways are full access and
should remain so in order to allow access for school buses.
The developer and the City want a full access to serve the Nature's Refuge project. The City is working with the
school on the possibility of combining the western school access with the new street serving the development. That
is, the western school driveway would be closed, and a new connection made to the new street leading into the
development. This option may offer safety improvements for school buses because they would access the school
site from a local road rather than directly from a busy arterial. This concept poses some challenges because, though
the school site abuts the Nature's Refuge site, they are separated along CSAH 14 by a small lot of about 0.4 acres
with 100 ft. of frontage. The new, combined access must be designed around this existing residential lot. School
site circulation for buses and other vehicles will need to be examined to ensure efficient and safe movement.
The school day starts at 9:15 am, with bus drop -off between 9:00 and 9:10 am. The school day ends at 3:30 pm,
with buses departing at 3:40 pm. The peak hours for vehicle trips are 7:00 to 8:00 am, and 4:30 to 5:30 pm. The
traffic study analysis concluded that combining the accesses will not cause congestion problems on the new access
road for the school or for other traffic.
A traffic study was completed to examine the impacts of the proposed project on the surrounding roadway network.
(see Traffic Study Report, Attachment B). The following principal traffic questions are addressed in the report:
•
•
•
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
a) Is the proposed development access plan feasible and will it provide adequate traffic operations?
Page 18
b) Would adequate traffic operations be provided at the following intersections upon full completion of the
proposed development?
o CSAH 14 /CSAH 23
o CSAH 14 /4th Avenue North
o CSAH 23/Pine Street
o CSAH 14 /development access
o Pine Street/development access
To effectively address the traffic questions above, traffic forecasts were completed for the 2011 analysis year, which
is one year after expected full completion of the proposed project. Capacity analyses were completed for the subject
intersections under 2006 Existing, 2011 No- Build, and 2011 Build traffic scenarios. Based on the analysis presented
in the traffic study, the following basic conclusions were established:
• Upon full completion of the Nature's Refuge residential development, adequate traffic operations will be
provided at the proposed development access locations and the following studied intersections:
o CSAH 14 /4th Avenue North
o CSAH 23/Pine Street
o CSAH 14 /development access (if full access to project)
o Pine Street/development access
• Analysis indicates that the CSAH 14 /CSAH 23 intersection is currently approaching capacity and will
experience excessive delays under the 2011 No -Build traffic volumes. These delays will increase upon the
addition of the proposed development traffic. As described in the report, the peak hour volume signal warrant is
satisfied during the AM and PM peak hours for all scenarios. Under traffic signal operation and existing
geometry, the intersection will operate at LOS C or better, though some movements at the intersection would
operate at LOS D. The feasibility of installing a signal should be investigated further through the completion of
a full signal justification report.
• The location of a new development access to CSAH 14 does not satisfy the County's current spacing
requirements for a full- movement intersection. However, it does satisfy spacing requirements for the right -
in/right -out operation. The option of combining it with the western school access would reduce two access
points into one full access intersection. A cooperative effort between the County, City, school board, and
developer is needed for this option. This will include what improvements are needed to CSAH 14, including
turn lanes.
• The proposed development will have the following impacts on the overall regional transportation system:
• A small increase in traffic volumes on the overall system. Volume generated by this development is
distributed in multiple directions and therefore will result in modest increase in any one particular area. This
small increase in traffic volumes will have a small effect on the level of service at CSAH 14 /CSAH 23, but
that intersection will experience unsatisfactory levels of service (LOS E) even without the additional trips
generated by the development.
• The option of consolidating the new project access onto CSAH 14 with the school access would result in one
access (a full access city street) rather than two (the full access school driveway and one new partial access
city street). This design would be a better way to pursuit the goals of the City /County CSAH 14 access
management study.
•
•
•
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
22. Vehicle - related air emissions. Estimate the effect ofChe project's
carbon monoxide levels. Discuss the effect of - traffic improvements o
i rnpacts. Note: If the project involves 500 or more parking spaces, co
detailed air quality analysis is needed
Page 19
anon on air quality, pact
tigation measures on air qua
ruidelines about whether a
The attached traffic analysis report indicates that the CSAH 14 /CSAH 23 intersection is currently approaching
capacity and will experience excessive delays, even under a No -Build scenario. These delays will increase upon the
addition of the proposed development traffic. Thus, the report recommends the placement of a traffic signal at this
intersection. Assuming that the recommended traffic signal is installed, the planned transportation improvements
associated with the Nature's Refuge project are expected to adequately manage the traffic demand and eliminate
significant delays and congestion, the primary cause of traffic air quality impacts. If turn lanes are added to CSAH
14 (to be determined) where this project's access point is located, this will have the effect of minimizing the
potential for creating concentrations of vehicle- related emissions, such as carbon monoxide. The current
concentration of carbon monoxide in the immediate area is low. Concentrations are expected to be the highest at
intersections with poor levels of service that cause regular vehicle idling. Additional information regarding level of
service is contained in the response to Question 21 above.
. Stationary source air emissions. Describe the type; sources, quantities and com
rem stationary sources of air emissions such as boils, exhaust stacks or fugitive, dust sources. Include'any',
ardous air pollutants (consult EAW Guidelines fora listing) and any greenhouse gases (such as
dioxide, methane, nitrous oxide) and ozone - depleting chemicals (chloro- fluorocarbons, hydrofluorocarbons
perfluorocarbons or sulfur heatafluoride). Also describe any proposed pollution prevention techniques and
oposed air pollution control devices. Describe the impacts on air quality.
This project does not involve any stationary sources of air emissions such as boilers, exhaust stacks, or fugitive dust
sources. Like other single - family residential subdivisions, it is not anticipated that this project will produce
hazardous air pollutants, greenhouse gases, or ozone depleting chemicals.
24. Odors, noise and dust.' Will the project: generate odors, noise or dt
X Yes No If yes; describe sources, characteristics, duratio
ures to mitigate adverse impacts. Also identify locations of n+
Discuss `potential Impacts on hninan health or quail
operations may be discussed at item 23 instead 'ofhere)
ang operation?
and any proposed !
s and estimate impacts
dust generated by
Noise and dust will be generated at various times by construction activity. The large amount of imported fill
material needed will require approximately 3920 truckloads to be brought in to the site each year for about four
years. This level of truck traffic will be noticeable in the area and may generate somewhat higher levels of noise
and dust in the immediate vicinity of the construction zone. Water will be applied to exposed soils during dry
weather to mitigate dust movement. The hours of construction will be limited according to the City of Lino Lakes
and State of Minnesota noise regulations. City practice is to limit construction to 7:00 am to 7:00 pm Monday
through Friday, 9:00 am to 5:00 pm Saturday, with no construction on Sundays or federal holidays.
Residential neighborhoods and an elementary school are in the immediate vicinity of the project site. There are 22
existing residences and the school site within 100 feet of the site. The above measures will be employed to
minimize inconveniences to them.
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
25. Nearby resources. Are any of the following resources on or in pro xi'
chaeological historical or architectural resources? �_- Yes X No
Prime or unique farmlands or land - within an agricidtural preserve?
Designated parks, recreation areas or trails? X Yes - _„No
Scenic views and vistas? _Yes X No
l er unique resources? Yes X No
the s
Page 20
yes, describe'the resource axd identify any
or avoid
Ear
According to the State Historic Preservation Office, "no archaeological sites or historic structures were identified in
a search of the Minnesota Archaeological Inventory and Historic Structures Inventory for the search area requested."
During May of 2006, The 106 Group conducted a Phase I archaeological survey and architectural history assessment
for the Nature's Refuge Development project (see Archaeological Survey, Attachment C). The proposed housing
development project area encompassed approximately 232 acres, of which one acre was tested for archaeological
resources. Shovel testing was performed within three identified areas of high archaeological potential. A total of 28
shovel tests were excavated to an average depth of 83 cmbs, but no archaeological materials were recovered. Based
on the lack of archaeological materials found within the surveyed areas, no further archaeological work is
recommended prior to construction of the proposed project.
The athletic fields and wooded/wetland area immediately north of (and belonging to) Lino Lakes Elementary School
are adjacent to the project property. The wetland area is an off -site part of Wetland 7. Also, the small portion of the
project site that extends to the east and lies within Section 4 is part of Wetland 7 and is currently designated as City
Park land. No permanent adverse impacts are expected to affect these resources. Temporary impacts would include
exposure to routine construction- related noise and dust.
26. Visual impacts
from intense li
telm? 'eyes X No If yes,, e:
lights visible in w
dverse visual impacts du
ernes areas and large vi
In regard to "scenic views and vistas ", the EAW Guidelines states:
"ng coilstr
ible plume
ton or
Such as g]
r`exln
g tower
These may include spectacular viewing points along lakes, rivers, or bluffs; virgin timber tracts; prairie
remnants; geological features; waterfalls; specimen trees; or plots of wildflowers. Many are not officially
designated or marked, but because of their local or statewide interest should be considered by the RGU.
Impacts on the visual quality or integrity of these resources should be addressed as well as the physical
impacts.
The proposed project site is presently a large, open area presenting a view from Main Street of a varied quasi - natural
expanse of grassland, forest, and wetland. From Pine Street it presents a view of forest with unbroken canopy,
except at wetland openings. The southern portion of the site visible from Main Street was recently clearcut and can
be expected to be a weedy and scrubby field for many years to come if no further action is taken. These views may
well be regarded by some as scenic, although "spectacular" would probably be an overstatement because the views
of fields, wetlands, and woods present on the project site are common in the Lino Lakes region.
If the project goes forward, the views for local residents will include new houses in places that presently have no
buildings. The appearance of new homes is a common change in any outer suburb in a metropolitan area. Most of
the existing wetlands and some of the forested area will become part of the conservation area, and thus will be
restored and preserved. New trails and boardwalks created as part of the project will allow the public access to
viewing points at the margins of several of the wetland conservation areas.
Temporary visual impacts will occur as a result of restoration and management activities in the conservation areas.
These activities will involve brush cutting, use of mechanized equipment, and prescribed burning during specific
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 21
periods. Some of this activity will be visible from publicly accessible areas along Main Street and Pine Street, and
possibly from adjacent neighborhoods and the elementary school.
27. Compatibility with plans and land use regulations.'
plan, land use plan or regulation, or other applicable la
ona1, state or federal agency? X Yes _No.
yes, describe the plan, discuss its comps t'bi
If no, explain.
d use, water, or resource management p1
iprehensive
of a local„'
The Lino Lakes Comprehensive Plan includes goals and policies for a wide variety of issues relevant to new
development such as the natural environment, land use and growth management, and transportation.
The Comprehensive Plan guides the project site for Low Density Sewered Residential land use. "Low- density"
indicates a target housing density of 1 to 3 units per acre. The proposed project will result in a housing density of
approximately 1.2 units per acre (278 units on approximately 232 acres) if the entire property is considered, or about
2.78 units per acre (278 units on approximately 100 acres) if the conservation areas are excluded from the
calculation.
The site is in a City - designated first -stage growth zone, meaning that development may be considered during the
period from 1998 to 2010. Most of the site is within the existing Metropolitan Urban Service Area (MUSA), so the
City may extend sanitary sewer service to this area. Additional MUSA will be needed for the remaining part of the
site.
The project site is in the City of Lino Lakes, City Planning District 3. The project is compatible with all planning
recommendations for District 3 listed in the City's Comprehensive Plan, especially the establishment of greenways
and using innovative development techniques to preserve high quality natural amenities.
The City has a growth management policy that regulates the number of new platted lots /units per year and the
amount of MUSA that can be used annually. However, the policy removes most growth restrictions from
conservation development projects as an incentive.
City planning documents prioritize the preservation of the natural environmental assets of Lino Lakes. Also
encouraged is the use of "conservation development" to integrate preservation with appropriate development of City
land. The Nature's Refuge development has been designed as a conservation development that will restore, manage,
and preserve natural assets while providing new housing.
The restoration and conservation aspects of the project are consistent with numerous goals stated in the Natural
Environment section of the Policy Plan chapter of the City's Comprehensive Plan. To realize those goals, the Plan
establishes a set of policies. The Nature's Refuge project is specifically consistent with the following:
General Policies
General Policy 3: Integrate new development to the natural characteristics of the land to enhance the
development through the preservation of attractive natural amenities (i.e., wetlands, waterways, wooded areas,
slopes, etc.). Consider new development regulations that serve to preserve unique natural areas.
General Policy 5: Promote greenway planning to protect environmentally sensitive areas of the City, to
preserve natural area and open space, and to define neighborhoods:
Comment: The project is specifically designed to integrate the residential area with green space and protected
natural areas, including forest and wetland, including rare wetland communities. The project will actively restore
and conserve these natural areas, providing greater preservation of Lino Lakes' natural assets than a passive -
conservation easement approach would provide.
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 22
Vegetation Policies
Vegetation Policy 1: Encourage the preservation of natural vegetation including plants of Oak Savannas,
prairies, woodlands, wetlands and aquatic vegetation to be a design consideration for new subdivisions.
Vegetation Policy 5: Promote the use of native grasses, forbs, shrubs and trees in development site
restoration.
Vegetation Policy 7: Implement strategies for the control of invasive /exotic plant species in greenways,
natural areas, and open spaces.
Comment: The project is specifically designed to restore and preserve native vegetation, and to manage the
natural areas to eradicate exotic plant species and minimize the chance of further invasions.
Storm Water/Wetlands/Drainage Policies
Storm Water/Wetlands/Drainage Policy 2: Restrict or prohibit development on wetlands, floodplains and
other natural features that perform important environmental functions in their natural state. Where
desirable and practical, maintain such natural features in a condition for appropriate storm water system or
recreational uses.
Storm Water/Wetland Drainage Policy 3: Prohibit development on or alteration of natural drainage system
components where storm water can be adequately managed without construction of storm sewer.
Storm Water/Wetland Drainage Policy 4: Require subdivisions to plat lots with minimum lot area above
the designated wetland boundaries to insure adequate buildable area and usable yards.
Storm Water/Wetland Drainage Policy 6: Promote higher quality surface water treatment facilities through
the use of infiltration and bioretention where appropriate.
Storm Water/Wetland Drainage Policy 7: Utilizing the Shoreland Ordinance, establish natural vegetative
buffer areas along all lakes, wetlands, creeks, and drainage ways in new developments.
Comment: The City has a Surface Water Management Plan, with which all development projects are required
to comply. The project will require fill of approximately 7.5 acres of existing wetland, but will restore and
preserve the large majority of wetlands on site, including those directly connected via surface channels /ditches
to the City ditch system that leads to Marshan Lake. Storm drainage will be handled on site using local -scale
infiltration and bioretention solutions: rain gardens, swales, retention ponds. This will prevent direct runoff
impacts to wetlands, allowing the existing drainage system to continue functioning without significant
alteration. Buffer zones and greenway areas will separate built areas from wetlands, ensuring retention of
vegetated filter/buffer strips along all wetland boundaries.
Pedestrian/Bicycle Trails Policies
Pedestrian/Bicycle Trails Policy 1: Implement the trail planning recommendations of the 1992 Lino Lakes
Comprehensive Park Plan and Development Guide, as may be amended.
Pedestrian/Bicycle Trails Policy 2: Where feasible, provide pedestrians separated rights -of -way apart from
all forms of moving traffic in heavily traveled pedestrian zones, along major thoroughfares and in the more
densely developed portion of the community.
Comment: The project will establish new public - access trails that will join Main Street and Pine Street, allowing
pedestrians to traverse the entire development in rights -of -way that will be separate from vehicular traffic.
The Parks plan also gives considerable priority to the City's developing Greenway and Trails systems. According to
the Preliminary Park, Greenway, and Trail System Plan, the project site is slated to be part of the City greenway
system, with a portion of the City trail network crossing through the property. Much of the site's upland acreage is
proposed Natural Resource Conservation Area. The main wetland complex (including Wetlands 3, 4, 6, 7, and some
smaller wetlands) is proposed Natural Resource Protected Area. The project is largely consistent with these
designations, in that it will restore, manage, and conserve in perpetuity most of the wetland acreage on the site, and
will restore, manage, and conserve a portion of the upland acreage as buffer area. Further, as noted above, the
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 23
project will provide public access trails through the property, outside of the built area and adjacent to conserved
natural areas.
In addition to the above -noted priorities, the Lino Lakes Parks, Natural Open Space /Greenways and Trail System
Plan (August, 2004) establishes the City's interest in maintaining a high level of environmental quality and a nature -
oriented development context (the "city as a park" concept) by promoting "ecological protection, responsible land
stewardship, long -term sustainability, and economic viability ". In order to achieve these aims, it emphasizes the
need to explore "combining standard regulatory controls with alternative approaches to the development process
(such as conservation development) ", in order to ensure that funding and other mechanisms will be put in place to
ensure the realization of environmental goals. The Nature's Refuge project is consistent with these interests because
it jointly prioritizes conservation and residential development. Further, it builds the conservation costs into the
development funding, minimizing the City's financial obligation.
Zoning and Subdivision Ordinances
The majority of the site is zoned R -1 Single Family Residential, while 60 acres is zoned R -X Rural Executive. To
accommodate the conservation development, the entire project site would be rezoned to Planned Unit Development
(PUD). The zoning ordinance provides for the creation of a PUD to allow flexibility of site design for the
conservation of land and open space. A PUD allows for deviation from strict zoning provisions to encourage such
things as preserving and enhancing desirable site characteristics and promoting desirable and creative environments
that might be prevented through the strict application of regulations. A PUD includes the platting of land according
to the subdivision ordinance. Platting requirements of the Subdivision Ordinance will apply to the project.
nd public services. Will new
to'serve the project? X Yes
ded. (Note: any infrastructure tha
Ee EAW. see EAW Guidelines for details.)
tiled utilities, "roads,
o. If yes, describe
action with
As part of this development, public roads will be developed within the site. All new roads will be designed to City
of Lino Lakes Standards. All of the customary urban services will be provided as the site develops. Sanitary sewer
with a lift station and watermain will be connected to existing facilities. A trunk watermain is proposed for the site.
This watermain and lift station will serve this site and future sites as well as providing utility access to existing
subdivisions.
29. Cumulative impacts. Minnes Minnesota Rule part 4410.1700, subpart 7, item B requires that the RGU consider the
"cumulative potential effects of related or anticipated future projects" when determining the need for an
Fvironmental impact statement. Identify any past, present or reasonably foreseeable future projects that may
interact with the project described in this EAW in such a way as to cause cumulative impacts. Describe the
f the cumulative impacts and summarize any other available information relevant to determining''
there is potential for significant environmental effects due to cumulative impacts (or discuss each
cumulafive.impact under wropriate item(s) elsewhere on this form).
There are no known projects that would interact with this project that would cause cumulative impacts. Background
traffic growth is addressed in Item 21, Traffic. Surface water runoff is addressed by the design of the project so that
water quality will be maintained, and wetland hydrology maintained or restored, as explained in Items 6, 12, 17.
Adjacent land is largely developed already. Development of land downstream in the drainage system has potential
for impacts, but with the conservation development approach utilized on the Nature's Refuge project, such impacts
will be minimized to a much greater degree than under standard development practices. Municipal infrastructure
needed to serve development is being planned to accommodate development in accordance with city policies.
30. Other potential enviror
addressed by items 1 to 2
rtal
xmpa
identify and discus
rtay cause any adverse enviro
here, along with any proposed mitigati
All anticipated adverse environmental impacts are discussed above in items 1 to 28.
not
•
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 24
Summary of issues. no not co nip ete'this section the EAR' being done for EIS scoping; instead address'
relevant'issues in the 'draft Scoping Decision dvcumer which ,must accompany the SAW.. List any impacts and
issues identified above that may require" further investigation he fore the project is begun. Discuss any'
alternatives or mitigative measures that have been or may be considered for these impacts and issues, mcluding'
those that have been or may ordered as permit conditions.
Conservation Development
The project will combine desired infill residential development in Lino Lakes with conservation of a valuable
wetland complex. This rare wetland type and its rare plant species will be restored to higher - quality conditions and
managed to remain a high - quality system dominated by native plant species, while maintaining its present suite of
wetland services and values (e.g. flood retention, protection of downstream public waters). The revenue generated
by the development of the residential subdivision will allow for the full funding of the restoration and management
plan. A small percentage of wetland area and a quantity of forested upland will be lost as a result of the
development, in exchange for creation of the high - quality conservation reserve including the remaining wetlands
and surrounding forested uplands. This plan has been given initial provisional support by several regulatory
agencies.
Wetland Impacts
The project will result in filling of 7.5 acres of wetland, and in the restoration, management, and preservation of 132
acres under a conservation easement with an ongoing management plan in perpetuity. Most wetland area to be filled
is presently in a disturbed, degraded condition. All wetland acreage to be put under conservation management will
be restored to higher - quality conditions with greater floristic diversity and reduced abundance of exotic invasive
plant species. The conservation plan will also include restoration and management of upland wooded areas and
other vegetated buffers along wetland boundaries.
Wetland losses are expected to be mitigated by wetland credits generated through the establishment and
management of the conservation area. It is hoped that this area will be designated as an area of Exceptional Natural
Resource Value (ENRV) based on the existence of several rare (state- listed) plant species and a rare wetland
community. The BWSR Wetland Committee has expressed initial approval of this approach for this site (April 2006
meeting). This designation will allow greater wetland credit generation. It is expected that the conservation plan
will allow accumulation of excess wetland credit, which will be banked for future mitigation needs.
Forest and Tree Impacts
The project will cause the conversion of 51 acres of forest, resulting in the loss of forest wildlife habitat and a large
number of trees. The development is designed to preserve existing trees and forested upland buffers wherever
possible. Remaining forest patches will be restored and maintained as part of the conservation area, but will be a
smaller and more fragmented habitat than presently exists, and habitat for a variety of forest - interior animals and
plants will be lost or degraded. All mature trees have been surveyed and tagged in accordance with City ordinance.
Rare Species Impacts
Blanding's turtles and five rare plant species have been recorded on the site. At present, it is unknown how many
turtles use the site, but they are most likely to occur in and around the larger, deeper wetlands, which will be
protected from loss or impact by the project. By including upland wooded buffer zones in the planned conservation
areas, upland foraging and nesting habitat for Blanding's turtles will be maintained, though there may be some
permanent reduction in this type of habitat. As recommended by DNR, signs will be installed to inform residents
and visitors of the need for caution around turtle habitat. The installation of ribbon curbs in some places will reduce
barriers to turtle movements. Flyers will be given to all contractors working in the area, and future residents will be
informed of the presence of the turtles and their habitat needs. Silt fencing will exclude the turtles from construction
areas, but will be removed after construction and revegetation to allow free turtle movement. Culverts connecting
wetlands and ponding areas will be of recommended size and shape to allow turtle passage. The runoff and
sedimentation controls, and restriction on fertilizer use, will help maintain habitat quality for the turtles. In general,
the placing of the conservation areas under easement and long -term management will maintain habitat quality.
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
Page 25
The rare plant species found on the site are all native wetland plants that respond well to wetland restoration
measures that are planned for the conservation areas. However, a minority of populations of these plants presently
occur in wetlands that would be filled by the project. This will constitute a taking of rare plant populations which
will require a permit from the DNR. The DNR has expressed initial support for this approach on condition that the
conservation areas be fully restored and maintained as improved habitat for these plant species. Also, attempts will
be made to transplant existing populations from those wetlands that will be filled into wetlands that will be restored.
Because future active restoration and management activities are primarily aimed at restoring and maintaining native
plant communities, the populations of rare species are expected to continue and possibly expand.
Flood Elevation
A portion of the site lies within a delineated 100 -year flood plain. The project will result in a re- grading of part of
the site, so changes to the flood elevation contour will be required. Construction and re- grading in the present flood
zone will be minimized, because only one street will cross the flood plain and no houses will be located within it.
Compensatory storage will be created for any floodplain fill. The FEMA floodplain map will be revised.
Drainage and Sedimentation
The project will be designed to avoid altering drainage conditions. Runoff will be directed to vegetated swales, rain
gardens, and infiltration ponds. Sedimentation ponds and rain gardens will be designed in accordance with City of
Lino Lakes requirements and both are proposed to treat storm water runoff before discharge. The ponds will be
designed to retain a 100 -year storm event and control the discharge rate to pre - development conditions. Drainage
from residential areas and impervious surfaces will be directed into infiltration areas in order to prevent
sedimentation or contamination of wetlands, to control inflow rates, and to maintain present hydrology as well as
possible. Infiltration ponds will be protected from soil compaction by construction equipment, and any compacted
areas will be disked to de- compact the soil, which will ensure water infiltration and successful re- vegetation.
Erosion Control
Erosion control measures will be implemented in accordance with the Storm Water Pollution Prevention Plan
(SWPPP) developed for this project to mitigate the potential for adverse surface water and air quality impacts from
runoff and wind erosion during construction. The SWPPP will incorporate Best Management Practices prescribed
by the MPCA. These measures, including silt fencing, ditch checks, stone exit pads, and prompt turf restoration
(including de- compacting, mulching, seeding) in graded areas. The phasing of construction will minimize the area
of soil exposed at any given time.
Water Use and Wastewater
The development, when fully occupied by residents, is expected to consume approximately 76,450 gallons of water
from City water supply each day. An approximately equal amount of waste water will be delivered to the City
sewage treatment system. These demands are within the capacity of existing infrastructure and systems.
Construction- Related Hazardous Materials, Noise, and Dust
Typical liquid materials associated with construction equipment, such as engine oils and coolants, may be
temporarily stored on site during construction. Spills are also possible. Standard BMPs will be employed to
minimize the likelihood of spills, and the impact of any spills that may occur. Similarly, dust -and- erosion - reduction
BMPs will be employed. Additional noise generation will be typical of any residential construction activity and will
cease after the construction phase.
Traffic and Air Quality
The project will generate a considerable quantity of new traffic, particularly on CSAH 14. Completing the
improvements indicated in the Traffic Impact Analysis will mitigate the additional traffic volume so as to not
adversely impact the traffic flow on adjacent roadways. Air quality will not be significantly impacted by the traffic
increase and proposed residential land use.
•
Environmental Assessment Worksheet
Nature's Refuge Conservation Development
Lino Lakes, Anoka County, Minnesota
Draft Document — September 25, 2006
RGU CERTIFICATION. The Environmental Quality
Worksheets for public notice in the EQB Monitor
at:
card will o
D Enviro
Page 26
ental Assessment
Led in
e EAW d complete projec
described in this document, which are related to the project as connect _
defined at Minnesota Rules, parts 441 0.0200, subparts 9b and 60, respectively.
Copies of this EAW', are being sent to the entire EQB distribution list.
e no other
Signature Date
Title
City Planner
Enviroumemtal Assess:
Administration. Department
Quality Board, 658 Cedar St
•
�t cif my knowledge
components other than those
actions or phased actions, as'
prepared by the staff of the Enlviro_�.
information, worksheet or for EAW Guudel
51.55,',651 -296- 8253,', or http: /fwww.egb.stat
Board at
Environmen
•
FIGURES
•
September 8, 2006
Critical Connections
Ecological Services, Inc.
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Site Location In Anoka County. Minnesota
Nature's Refuge Conservation Development
Environmental Assessment Worksheet
Figure 1
September 8, 2006
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Project Site Location and Boundaries
Nature's Refuge Conservation Development
Lino Lakes. Anoka County, Minnesota
Environmental Assessment Worksheet
Figure 2
7
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Legend:
® Project Location and Property Boundaries
j_ Wetland Locations (With Wetland Number)
State Listed Plant Species Locations
e Fimbristylis auturrnalis (Special Concern)
• Polygala cruciata (Endangered)
p Rotala ramosior (Threatened)
® Scirpus clintonii (Special Concern)
p Viola lanceolata (Threatened)
1000 0
1000 Feet
September 8, 2006
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Delineated Wetlands and Rare Plant Species Locations
Nature's Refuge Conservation Development
Lino Lakes. Anoka County. Minnesota
Environmental Assessment Worksheet
Figure 3
Legend:
ED Proposed Development Site Boundary
Proposed Trail System
Proposed Road Alignments
Proposed Residential Lot Lines
1000 0
(,t)
1000 Feet
September 8, 2006
Crttitol Connection
fcologkal Services, Inc.
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Proposed Site Plan with 2005 Aerial Photograph
Nature's Refuge Conservation Development
Lino Lakes. Anoka County, Minnesota
Environmental Assessment Worksheet
Figure 4
•
ATTACHMENT A
(Minnesota DNR Natural Heritage Review Letter)
•
Minnesota Department of Natural Resources
January 30, 2006
Natural Heritage and Nongame Research Program, Box 25
500 Lafayette Road
St. Paul, Minnesota 55155-40_
Phone: (651) 259 -5107 Fax: (651) 296 -1811 E -mail: sarah.hoffmann @dnr.state.mn.us
Jason Husveth
Critical Connections Ecological Services, Inc.
14760 Oakhill Road
Scandia, MN 55073
Re: Request for Natural Heritage information for vicinity of proposed Carlson / Peterson Conservation
Development, T31N R22W Sections 4 & 5, Anoka County
NHNRP Contact #: ERDB 20060543
Dear Mr. Husveth,
The Minnesota Natural Heritage database has been reviewed to determine if any rare plant or animal
species or other significant natural features are known to occur within an approximate one -mile radius of the
area indicated on the map enclosed with your information request. Based on this review, there are 31 known
occurrences of rare species or native plant communities in the area searched (for details, see enclosed database
printout and explanation of selected fields). Following are specific comments for only those elements that
may be impacted by the proposed project. Rare feature occurrences not listed below are not anticipated to be
affected by the proposed project.
• As you are aware, several rare plant species including Tubercled Rein- Orchid (Platantheraflava
var. herbiola), Cross - Leaved Milkwort (Polygala cruciata), and Twisted Yellow -Eyed Grass
(Xyris torta), all endangered species; Lance - Leaved Violet (Viola lanceolata) and Tooth —Cup
(Rotala ramosior), both threatened species; and Autumn Fimbristylis ( Fimbristylis autumnalis),
Marginated Rush (Juncus marginatus), and Clinton's Bulrush (Scirpus clintonii), all special
concern species, have been documented within or immediately adjacent to the proposed
development site. These locations should be identified as high priority areas for protection and/or
restoration. If these areas are not protected and the project will impact any species listed as either
endangered or threatened, you will need to contact Bonita Eliason, Supervisor, Natural Heritage
and Nongame Research Program, at (65 1) 259 -5090 to discuss the endangered species permitting
process. Minnesota's endangered species law (MS 84.0895) and associated rules (Chapter
6212.1800 - 6212.2300 and 6134) prohibit taking, importing, transporting, or selling endangered
or threatened plants or animals, including their parts or seeds, without a permit. For plants, taking
includes picking, digging, or destroying. For additional information on the permitting process,
please see http: / /www.dnr.state.mn.us /ecological services /nhnra /endangered permits.html
• The project area is within a "known concentration" area of Blanding' s Turtles (Emydoidea
blandingii), a state threatened species. There are 15 such areas in the state. These areas have
been determined by the DNR to be locations of highest priority for research and management
activities, and are relied upon to maintain the species' security in the state. Blanding' s Turtles
spend much of their time in shallow wetlands (1 -3 feet deep), but they nest in open, sandy uplands
up to 1 mile from wetlands. Nesting is in June and eggs hatch in September, at which time young
turtles enter deep wetlands where they over- winter in soft sediments. Factors believed to
DNR Information: 651 -296 -6157 • 1- 888 - 646 -6367 • TTY: 651- 296 -5484 • 1 -800- 657 -3929
An Equal Opportunity Employer
Printed on Recycled Paper Containing a
Minimum of I0g Post - Consumer Waste
contribute to the decline of this species include wetland drainage and degradation, development
on upland nesting areas, and possibly collection for the pet trade. In addition, because of the
tendency for Blanding's Turtles to travel long distances over land, they are often forced to cross
roads in developed areas. Many of the records we have of Blanding's Turtles are from turtles
killed crossing roads.
For your information, I have attached a fact sheet and a flyer about the Blanding's Turtle. The fact
sheet is intended to provide you with background information regarding habitat use, life history,
and reasons for the species' decline, as well as recommendations for avoiding and minimizing
impacts to this rare turtle. As you will note, there are two lists of recommendations. The first list
contains recommendations to prevent harm to turtles during construction work, and is relative to
all areas inhabited by Blanding's Turtles. The second column expands on the first column, and
contains greater protective measures to be considered for areas known to be of state -wide
importance to Blanding's Turtles. Because your project is within one of these areas, please refer to
both list of recommendations. The flyer, which should be given to all contractors working in the
area, contains an illustration and description of the Blanding's Turtle, as well as a summary of the
recommendations provided in the fact sheet.
Please note that the majority of the project area is within an area identified as a Regionally
Significant Ecological Area (RSEA). In 2003 the DNR Central Region, in partnership with the
Metropolitan Council, conducted this landscape -scale assessment of the seven - county metro area
that identified ecologically significant terrestrial and wetland areas, The mapping of RSEAs was
done using two primary data sources. The first data source was native plant communities mapped
by the Minnesota County Biological Survey. The remaining areas were derived using a modeling
process that predicts the likelihood that high quality native animal habitats exist in a contiguous
area. GIS shapefiles of the RSEAs are available on the DNR's data deli website at
http: / /deli.dnr.state.nm.us (referred to as "Twin Cities Metro Regionally Significant Ecological
Areas)." To view pdf versions of the final RSEA maps, refer to
http://www.dnr.state.mn.usirsea/index.html . If you would like help interpreting the data, contact
Hannah Texler, Regional Plant Ecologist, at 651 -772 -7570 or hannah.texler @dnr.state.mn:us
The Natural Heritage database is maintained by the Natural Heritage and Nongame Research Program,
a unit within the Division of Ecological Services, Department of Resources. It is continually updated as
new information becomes available, and is the most complete source of data on Minnesota's rare or otherwise
significant species, native plant communities, and other natural features. Its purpose is to foster better
understanding and protection of these features.
Because our information is not based on a comprehensive inventory, there may be rare or otherwise
significant natural features in the state that are not represented in the database. A county -by- county survey of
rare natural features is now ;underway, and has been completed for Anoka County. Our information about
native plant communities is, therefore, quite thorough for that county. However, because survey work for rare
plants and animals is less exhaustive, and because there has not been an on -site survey of all areas of the
county, ecologically significant features for which we have no records may exist on the project area.
Because our information is not based on a comprehensive inventory, there may be rare or otherwise
significant natural features in the state that are not represented in the database. A county-by- county survey of
rare natural features is now underway, but has not been completed for Anoka County. Therefore ecologically
significant features for which we have no records may exist on the project area.
The enclosed results of the database search are provided in two formats: index and full record. To
control the release of locational information which might result in the damage or destruction of a rare element,
both printout formats are copyrighted.
•
•
The index provides rare feature locations only to the nearest section, and may be reprinted, unaltered,
in an Environmental Assessment Worksheet, municipal natural resource plan, or report compiled by your
company for the project listed above. If you wish to reproduce the index for any other purpose, please contact
me to request written permission. The full-record printout includes more detailed Iocational information,
and is for your personal use only. If you wish to reprint the full-record printouts for any purpose, please
contact me to request written permission.
Please be aware that review by the Natural Heritage and Nongame Research Program focuses only on
rare natural features. It does not constitute review or approval by the Department of Natural Resources as a
whole. If you require further information on the environmental review process for other natural resource -
related issues, you may contact your Regional Environmental Assessment Ecologist, Wayne Barstad, at (651)
772 -7940.
An invoice in the amount of $92.85 will be mailed to you under separate cover within two weeks of
the date of this letter. You are being billed for map and database search and staff scientist review. Thank you
for consulting us on this matter, and for your interest in preserving Minnesota's rare natural resources.
Sincerely,
Sarah D. Hoffmann
Endangered Species Environmental Review Coordinator
encl: Database search results
Rare. Feature Database Print - Outs: An Explanation of Fields
Fact sheets: Blanding's Turtles
Cc: Wayne Barstad
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Rare Features Database Print -outs: An Explanation of Fields.
The Rare Features database is part of the Natural Heritage Information System,
and is maintained by the Natural Heritage and Nond me Research Program,
a unit within the Division of Ecological Services, .
Minnesota Department of Natural Resources (DNR).
* *Please note that the print -outs are copyrighted and may not be reproduced without permission **
Feld Name: [Full (non- abreviated) field name, if different]. Further explanation of field,
-c-
CBS Site: [County Biological Survey site number]. In each county, the numbering system begins with I.
CLASS: A code which classifies features by broad taxonomic group: NC = natural community; SA = special animal; SP _
special plant; GP = geologic process; GT = geologic time; OT = other (e.g., colonial waterbird colonies, bat hibernactila).
Ctv: [County). Minnesota counties (ordered alphabetically) are numbered from 1 (Aitkin) to 87 (Yellow Medicine).
CURRENT STATUS: Present protection status, from 0 (owner is not aware of record) to 9 (dedicated as a Scientific and
Natural Area).
-D,
DNR Region: 1 =NW, 2- NE, '3 =E Central, 4=SW, 5 =SE, 6= Minneapolis/St. Paul Metro.
DNR Quad: [DNR Quadrangle code]. DNR- assigned code of the U.S. Geologic Survey topographic map on which the rare
feature occurs.
ELEMENT or Element See AElement Name (Common- Name)C
Element Name (Common Name): The name of the rare .feature, For plant and animal species records, this field holds the,
scientific name, followed by the common name in parentheses; for all outer elements (such as plant communities, which have
no scientific name) it is solely the element name.
EO RANK: [Element Occurrence Rank]. An evaluation of the quality and condition of natural communities from A (highest)
to D (lowest).
EO Size: [Element Occurrence Size]. The size in acres (often estimated) of natural communities.
FED -F-
FED STATUS: [Federal Status]. Status of species under the Federal Endangered Species Law: LE=endangered,
LT =threatened, C= species which have been proposed for federal listing.
Federal Status: See ,AFED STATUS@
Forestry District; The Minnesota DNR =s Division of Forestry district number.
-G-
GLOBAL RANK: The abundance of an element globally, from GI (critically imperiled due to extreme rarity on a world -wide
basis) to 65 (demonstrably secure, though perhaps rare in parts of its range). Global ranks are determined by the Conservation
Science Division of The Nature Conservancy.
INTENDED STATUS: Desired protection status. See also ACURRENT STATUS.@ If a complete list . of protection status
codes is needed, please contact the Natural Heritage Program
-L-
LAST OBSERVED or Last Observed Date or Last Observation: Date of the most recent record of the element at the location.
Latitude: The location at which the occurrence is mapped on Natural Heritage Program maps. NOTE: There are various
levels of precision in the original information, but this is not reflected in the latitude/longitude data. For some of the data,
particularly historical records,. it was not possible to determine exactly where the original observation was made (e.g. "Fort
Snelling ", or "the south shore of Lake Owasso "). Thus the latitude /longitude reflect the mapped location, and not necessarily
the observation location.
Legal: Township, range and section numbers.
Lagi : [Longitude]. See NOTE under ALatitude@
-M-
MANAGED AREA or Managed Area(s): Name of the federally, state, locally, or privately managed park, forest, preserve, etc.,
containing the occurrence, if any. If this field is blank, the element probably occurs on private land. If "(STATUTORY
BOUNDARY)" occurs after the name of a managed area, the location may be a private inholding within the statutory boundary
of a state forest or park.
Map Sym: [Map Symbol]..
MN STATUS: [Minnesota Status]. Legal status of plant and animal species under the Minnesota endangered species law:
•
END=endangered, THR =threatened, SPC= special concern, NON=no legal status, but tracked. This field is blank for natural
communities and colonial waterbird nesting sites, which have no legal status in Minnesota, but are tracked by the database.
-N-
NC Rank: [Natural Community Rank].
-O -
Occ #: [()Occurrence Number[. The occurrence number, in combination with the element name, uniquely identifies each record.
OCCURRENCE NUMBER: See AOcc #@
# OF OCCURS: The number of records existent in the database for each element within the area searched.
Ownership: Indicates whether the site is publicly or privately owned; for publicly owned Iand, the agency with management
responsibility is listed.
-P-
Precision: Precision of locational information of occurrence: C (confirmed) = known within 1/4 mile radius, U (unconfirmed)
known within 1/2 mile, N (non- specific) = known within 1 mile, G (general) = occurs within the general region, X
(unmappable) = location is unmappable on USGS topographic quadrangles (often known only to the nearest county), 0
(obscure/gone)=element no longer exists at the location.
PS: [Primary Section]. The section containing all or the greatest part of the occurrence.
-Q-
Quad Map: See ADNR Quad@
-R-
R= #: [Record number].
RNQ or Eng: [Range number).
-S-
SEC'i'ION or Section: [Section number(s)]. Some records are given only to the nearest section (s), but most are given to the
nearest quarter - section or quarter - quarter- section (e.g., SWNW32 denotes the SW1 /4 of the NW1 /4 of section 32). A "0" is
used as a place holder when a half-section is specified (e.g., ONO3 refers to the north 1/2 of section 3). When a..occurrence
crosses section boundaries, both sections are listed, without punctuation (e.g., the NE1 /4 of section 19 and NW1 /4 of section 2Q
is displayed as ANE19NW20 ").
Site: A name which refers to the geographic area within which the occurrence lies. If no nanne for the area exists (a locally used
name, for example), one is assigned by the County Biological Survey or the Natural Heritage Program. ,
Source: The collector or observer of the rare feature occurrence.
S RANK: [State Rank]. A rank assigned to the natural community type which reflects the known extent and condition of that
community in Minnesota.. Ranks range from 1 (in greatest need of conservation action in the state) to 5 (secure under present.,
conditions). A "7' following a rank indicates little information is available to rank the community. Communities for which
information is especially scarce are given a "U ", for Arank undetermined @. The ranks do not represent a legal status. They are
used by the Minnesota Department of Natural Resources to set priorities for research, inventory and conservation planning.
The state ranks are updated as inventory information becomes available.
State Status: See AMN STATUS@
-T-
TWP or Twp: [Township number].
-V-
Verification: A reflection of the reliability of the information on which the record is based. The highest level of reliability is
"verified," which usually indicates a collection was made or, in the case of bird records, nesting was observed. Plant records
based on collections made before 1970 are unverified.
Voucher: The museum or herbarium where specimens are maintained, and the accession number assigned by the repository. In
the case of bald eagles, this is the breeding area number_
-W-
Wildlife Area: The Minnesota DNR =s Division of Wildlife administrative number.
Data Security
Locations of some rare features must be treated as sensitive information because widespread knowledge of these locations could result in harm to the rare
features. For example, wildflowers such as orchids and economically valuable plants such as ginseng are vulnerable to exploitation by collectors; other species.
such as bald eagles, are sensitive to disturbance by observers. For this reason, we prefer that publications not identify the precise locations of vulnerable species.
We suggest describing the location only to the nearest section. If this is not acceptable for your purposes, please call and discuss this issue with the
Environmental Review Specialist for the Natural Heritage and Nongame Research Program at 651/296- 7863.
Revised 9r2002
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ATTACHMENT B
(Traffic Study Report)
•
•
•
Wenck File #1344 -05
Prepared for:
OAKWOOD LAND DEVELOPMENT
Prepared by:
WENCK ASSOCIATES, INC.
1800 Pioneer Creek Center
P.O. Box 249
Maple Plain, Minnesota 55359 -0249
(763) 479 -4200
T: \1344 \05 \Report \1344 -05 update.doc
Traffic Study for
Proposed Nature's
Refuge Residential
Development
Lino Lakes, MN
August 31, 2006
Wenck
•
Table of Contents
1.0 PURPOSE AND BACKGROUND 1 -1
2.0 EXISTING CONDITIONS 2 -1
3.0 TRAFFIC FORECASTS 3 -1
4.0 TRAFFIC ANALYSES 4 -1
5.0 CONCLUSIONS AND RECOMMENDATIONS 5 -1
TABLES
1 TYPICAL WEEKDAY PEAK HOUR TRIP GENERATION
FOR PROPOSED DEVELOPMENT
2 WEEKDAY A.M. PEAK HOUR LEVELS OF SERVICE
3 WEEKDAY P.M. PEAK HOUR LEVELS OF SERVICE
FIGURES
1 PROJECT LOCATION
2 SHE PLAN
3 WEEKDAY PEAK HOUR DEVELOPMENT TRIPS
4 WEEKDAY PEAK HOUR MOVEMENT VOLUMES
5 AVERAGE DAILY TRAFFIC VOLUMES
6 RECOMMENDED ACCESS PLAN
•
•
1.0 Purpose and Background
This traffic study is to fulfill the requirements of question 21 in the Environmental Assessment
Worksheet (EAW) completed for the proposed Nature's Refuge residential development.
The site for the proposed development is located in the City of Lino Lakes, MN. The subject site,
presently undeveloped, is bounded by County State Aid Highway 14 (CSAH 14) frontage to the south
and Pine Street to the north. The development is generally located between 4th Avenue N. and CSAH
23 (Lake Drive). See Figure 1 for project location.
The following principal traffic questions are addressed in this study:
a) Is the proposed development access plan feasible and will it provide adequate traffic
operations?
• b) Would adequate traffic operations be provided at the following intersections upon full
completion of the proposed development?
• CSAH 14 /CSAH 23
• CSAH 14 /4th Avenue North
• CSAH 23/Pine Street
• CSAH 14 /development access
• Pine Street/development access
The proposed development will consist of 278 single - family detached homes. Upon full completion of
the development one access connection will be provided at the south end of the property to CSAH 14
and one connection at the north end of the property to Pine Street. At this time, there are no provisions
for connection of this local street to adjacent parcels. The current site plan is shown in Figure 2.
Full completion of the proposed development is expected to occur by 2010.
•
P1
\NS.
MAIN
CARL
PALOMINO LA.
IPPALOOSA
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Cr*
111
ST.
TROL,_...—AS ST.
a
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3
ST.
ST.
NN's.
ST.
ANDALL
4-'‘‘
Smog L
LOTS
PROJECT
LOCATION
VICKI
I PINE $T.
135th AVE.
TECKLA
CT.
N
APPROXIMATE SCALE
0 2000'
OAKWOOD LAND DEVELOPMENT
Wenck
Wenck Associates, Inc. 1800 Pioneer Creek Center
Environmental Engineers Maple Plain, MN 55359
• ANALYSIS INTERSECTION
TRAFFIC STUDY FOR
NATURE'S REFUGE
RESIDENTIAL DEVELOPMENT
IN LINO LAKES, MN
1-2
George Watch Lake
FIGURE 1
PROJECT LOCATION
PINE St
OAKWOOD LAND DEVELOPMENT
Wenck
Wenck Associates, Inc. 1800 Pioneer Creek Center
Environmental Engineers Maple Plain, MN 55359
CSAH 14 (MAIN ST.)
TRAFFIC STUDY FOR
NATURE'S REFUGE
RESIDENTIAL DEVELOPMENT
IN LINO LAKES, MN
1-3
APPROXIMATE SCALE
0 800'
FIGURE 2
SITE PLAN
•
•
•
2.0 Existing Conditions
Geometrics and Traffic Control
Existing geometrics and traffic control at the subject intersections are as follows:
CSAH 14 /CSAH 23 This intersection is presently controlled by stop signs on all approaches.
Control at this intersection is supplemented by an overhead intersection control beacon providing
a flashing, circular red signal indication for each approach. The north approach provides one
through -left turn lane and one right turn lane. The south approach provides one through -left turn
lane and one right turn lane. The east approach provides one through -left turn lane and one
channelized right turn lane under yield condition. The west approach provides one through -left
turn lane and one channelized right turn lane under yield condition. The speed limit for the north
and south approaches is 50 mph. The speed limit for the east and west approaches is 40 mph.
Intersection lighting is provided in the northwest and southeast corners.
CSAH 14/4`h Avenue North This intersection is currently controlled by stop signs on the north
and south approaches. The north approach provides one left - through -right turn lane. The south
approach provides one left - through -right turn lane. The east and west approaches provide one
through -left turn lane and one right turn lane. The speed limit for the north approach is 45 mph.
The speed limit for the east, west, and south approaches is 50 mph.
CSAH 23 /Pine Street This "T" intersection is currently controlled by a stop sign on the west
approach. The north approach provides one through lane and one right turn lane. The south
approach provides one through -left turn lane. The west approach provides one left- turn/right-
turn lane. The speed limit for the north and south approaches is 55 mph. The speed limit for the
west approach is 30 mph. Pine Street is aggregate surfaced.
Existing Traffic Volumes
To better understand the existing traffic conditions at the subject intersections, turning movement
counts were completed during the AM and PM peak periods on April 26th and 27th and May 2nd
and 3rd, 2006. The existing peak hour volumes are presented in the Traffic Forecasts section.
The collected turn movement data indicated the AM peak hour occurs from 7:00 to 8:00 AM and
the PM peak hour from 4:30 to 5:30 PM.
3.0 Traffic Forecasts
To effectively address the traffic questions presented at the beginning of this report, traffic forecasts
were completed for 2011. It is standard practice to analyze traffic conditions for the year after full
completion of the proposed development. Specifically, AM and PM peak hour traffic volumes were
developed for the three subject intersections, as well as for the proposed access points to CSAH 14 and
Pine Street. Analysis of each location includes the following three scenarios:
• 2006 Existing
• 2011 No -Build
• 2011 Build
The following methodology was used to develop traffic volumes for the above three scenarios:
• 2006 Existing. Peak hour traffic volumes for this scenario were established based on AM
and PM peak period traffic counts completed at the three subject intersections on a
typical weekday.
• 2011 No- Build. To account for natural background traffic growth, existing volumes at
the subject intersections were increased at a rate of 5.0 percent per year. This growth
factor was established based on review of historic traffic volume maps and information
published in the TH 242 /CSAH 14 Access Management Study (May 1999). Traffic
volumes generated by other area developments that include a trips through the subject
intersections are expected to be accounted for in this conservative growth rate.
• 2011 Build. Volumes due to the proposed Nature's Refuge residential development were
added to the 2011 No -Build volumes to establish 2011 Build volumes.
The approach and the various steps involved in establishing development volumes are described
next:
• Trip Generation. Trip generation estimates for the 278 single - family detached houses
were developed based on data presented in the Institute of Transportation Engineers Trip
Generation, Seventh Edition. Trip generation estimates for the Nature's Refuge
development are shown in the Table 1.
•
•
•
•
Table 1
Typical Weekday Peak Hour Trip Generation for Proposed Development
Land Use
Size
Unit
AM Peak Hour
Trips
PM Peak Hour
Trips
Weekday
Trips
In
Out
In
Out
Single - Family Detached Housing
278
DU
52
157
177
104
2,660
Total Trips
52
157
177
104
2,660
DU = Dwelling Units
Trip distribution percentages for the proposed development (i.e. routes that motorists would use) were
established based on existing traffic counts, historical traffic flow maps, the TH 242 /CSAH 14 Access
Management Study (May 1999), locations of major trip attractions relative to the site, and an overall
review of the roadway system expected to be in -place in 2011. The distribution percentages applied to
the development trips are:
• 45 percent to and from the south on CSAH 23
• 10 percent to and from the north on CSAH 23
• 25 percent to and from the east on CSAH 14
• 15 percent to and from the west on CSAH 14
• 5 percent to and from the south on 4th Avenue North
The resulting weekday peak hour development trips as distributed to the roadway network are shown
in Figure 3.
Accounting for existing volumes and background growth, the total 2006 Existing, 2011 No- Build, and
2011 Build traffic volumes for the AM and PM peak hours are presented in Figure 4. The daily
volumes are shown in Figure 5.
PINE ST.
ui
1
cv "
1/4_i
7/23
XXPOI
2/5
WEEKDAY A.M. PEAK HOUR
WEEKDAY P.M. PEAK HOUR
OAKWOOD LAND DEVELOPMENT
Wenck
Wenck Associates, Inc. 1800 Pioneer Creek Cente
Environmental Engineers Maple Plain, MN 55359
sy--- 13/47
28/94
OD (Ni
JiC
9/5
28/19 -->
49/33
TRAFFIC STUDY FOR
NATURE'S REFUGE
RESIDENTIAL DEVELOPMENT
IN LINO LAKES, MN
3-3
JI
7/6
33/20 —4,
`.7
it-- 4/13
4— 9/31 MAIN ST
N
NOT TO SCALE
FIGURE 3
WEEKDAY PEAK HOUR
DEVELOPMENT TRIPS
A.M. PEAK HOUR
PINE ST.
F— 51717
-/-/13
w.
Ten
Thm
t- 3/4/4
E— 218/278/299
63/80/86 MAIN ST.
25/31/31 --+
-I -12 —4,
NCO
F—
249/318/318
9/11/18
16/20153 —4
kto
tCY
4/5/6 —±
310/396/403 —
43/55/55 —4,
2006
2011 NO -BUILD
— 2011 BUILD
XX/XX/XX
Itr
-1 -/9 --'
387/494/494 —3
72/92/101 -i'
217/277305
103/131/180
s
t— 19/24/28
4— 89/114/123
144/184/184
RM. PEAK HOUR
PINE ST.
4— 17/22/22
-1-147
W
S
15/19/23
300/383/406 --*
8/10/10 —4,
t— 15/19/19
4— 387/494/508
20/26/29
MAIN St
OAKWOOD LAND DEVELOPMENT
Wenck
Wenck Associates, Inc. 1800 Pioneer Creek Center
Environmental Engineers Maple Plain, MN 55359
14/18/18
-1 -15 —4,
<L
-1 - -31
398/508/508 --3
4iI
.N
4— 372/475/475
6/8/14 -3'
8/10/30
5
N
r
NOT TO SCALE
t
39/50/63
4— 222/283/314
116/148/148
149/190/195.'
115/147/166 —*
68/87/120 —1,
TRAFFIC STUDY FOR
NATURE'S REFUGE
RESIDENTIAL DEVELOPMENT
IN LINO LAKES, MN
3 -4
FIGURE 4
WEEKDAY PEAK HOUR
MOVEMENT VOLUMES
PROJECT
LOCATION
MAN ST=
6700/8500/9200
15100/19300/20600
0
TE
OAKWOOD LAND DEVELOPMENT
jWenck
Wench Associates, Inc. 1800 Pioneer Creek Center
Environmental Engineers Maple Plain, MN 55359
2006 \''
2011 NO-BUILD
2011 BUILD
)00C<P0(
TRAFFIC STUDY FOR
NATURE'S REFUGE
RESIDENTIAL DEVELOPMENT
IN LINO LAKES, MN
3-5
cergs
Itt
th
L,
1;L'atc1/4 Lake
FIGURE 5
AVERAGE DAILY
TRAFFIC VOLUMES
•
•
4.0 Traffic Analyses
The questions presented earlier are addressed next.
Q: Is the proposed development access plan feasible and will it provide adequate traffic
operations?
As previously stated, access to the development would be provided by a local street with one
connection at the south end of the property to CSAH 14 and one connection at the north end of
the property to Pine Street. The first step in assessing the feasibility of the proposed access plan
is to identify the applicable access spacing guidelines in the vicinity of the project. The
following sections address each access individually.
CSAH 14 Access
The County's access spacing guidelines are based on roadway functional classification and area
type. CSAH 14, within the study limits, is functionally classified as a "Principal Arterial ".
Considering the surrounding area and the 40 mile per hour speed limit on CSAH 14 at the
proposed development access, the most applicable area type for this roadway section is
"urbanizing ". The Anoka County access spacing guidelines published in the Anoka County
Highway Department Development Review Process (Dec. 2003) are; 1/2 -mile (2640 feet) for
primary full movement intersections, 1/4 -mile (1320 feet) for conditional secondary
intersections, and 1/2 -mile (2640 feet) signal spacing for a principal arterial in an urbanizing
area.
A secondary source of access guidance for CSAH 14 is the TH 212 /CSAH 14 Access
Management Study (1999). This study provides an access management plan for the TH
242 /CSAH 14 corridor that promotes management consistent with the routes function (principal
arterial) and the mobility needs of the region. Guidance provided in this secondary source differs
only in the spacing of the secondary intersections, indicating 1/6 -mile (880 feet) as
recommended spacing for secondary intersections. The access management study identifies
these secondary intersections as right - in/right -out only.
The access management study identified the following existing locations along CSAH 14 as full -
movement intersections:
• CSAH 14/4t Avenue North
• CSAH 14/Wood Duck Trail
• CSAH 14 /CSAH 23 (Lake Drive)
•
•
The distance between the proposed development access to CSAH 14 and Wood Duck Trail is
approximately 1600 feet. The distance between the proposed development access and CSAH 23
is approximately 1800 feet. Based on these distances, the proposed access to CSAH 14 does not
satisfy the County's criteria for a full- movement intersection. Secondary intersection spacing is
satisfied (using 1/6 mile criteria) since there is 1600 feet between the access and Wood Duck
Trail and 950 feet between the access and Aenon Place.
Anoka County's Development Review Process includes provisions encouraging all access from
local streets. Therefore, consideration was given to the possibility of CSAH 14 access to the site
exclusively via Wood Duck Trail, the nearest local street providing full- movement access.
Currently, the property along Wood Duck Trail is divided into single - family lots. It is our
understanding that the current residents are not interested in selling property which would be
used to provide access to the proposed development, resulting in increased traffic in their
neighborhood. Development access to other local streets connecting to the county system was
reviewed and dismissed, since connections of those particular streets (i.e. Aenon Place, Diane
Street) do not correlate with full- access locations identified in the TH 242 /CSAH 14 Access
Management Study.
Another option for future access to CSAH 14 would involve the combination of two access
points into one access point. This option would combine the proposed development access with
the existing school access on the north side of CSAH 14 which is located immediately east of the
proposed access. This option is illustrated in Figure 6. Under this option, Woodduck Trail and
the existing Nancy Drive access would be limited to right turn access in the future. This option
warrants consideration for the following reasons: (1) it combines two separate full access points
into one full access point, (2) it provides full access for higher volume cross streets as compared
to the Woodduck Trail location, and (3) it provides full access for the school, which will assist in
the routing of school buses.
In regards to the geometry of the proposed access to CSAH 14, the County typically requires left
and right turn lanes to be constructed for developments of this size. In our opinion, the left turn
lane requirement could be omitted due to the following:
• Consistency with existing local street intersection treatments along CSAH 14 and CSAH 23
in the project vicinity.
• The future vision for CSAH 14 is a four -lane urban facility with left and right turn lanes at
public intersections. If the combined access option is chosen, turn lanes would be constructed
at that time in conjunction with the reconstruction of access approaches.
• Existing commuter pattern to the east (source: TH 242 /CSAH 14 Access Management Study)
Based on the above information, all options for access should be reviewed and studied in detail
to determine the best access provisions for this particular area.
Full`
se access access\
(Future right turn access
OAKWOOD LAND DEVELOPMENT
Wenck
Wenck Associates, Inc. 1800 Pioneer Creek Center
Environmental Engineers Maple Plain, MN 55359
APPROXIMATE SCALE
0 200'
TRAFFIC STUDY FOR
NATURE'S REFUGE
RESIDENTIAL DEVELOPMENT
IN LINO LAKES, MN
4 -3
FIGURE 6
RECOMMENDED ACCESS
PLAN
•
•
Pine Street Access
Currently Pine Street is a low volume local road with aggregate surfacing. The County's access
spacing guidelines for local roads are; 1/8 -mile (660 feet) for primary full movement
intersections, no applicable guidance for conditional secondary intersections, and 1/2 -mile (2640
feet) signal spacing for a local roadway in an urbanizing area.
The distance between the proposed development access and Zodiac Street NE is approximately
900 feet. The distance between the proposed access and CSAH 23 is approximately 3100 feet.
The distance between the proposed access and 4th Avenue North is approximately 4100 feet.
Based on these distances, the proposed access satisfies the spacing requirements applicable to
local roads.
Access Conclusions
Based on the above information, cooperative effort between the County, City and developer is
needed to arrive at a long term solution for the proposed access to CSAH 14. As proposed, the
development access to CSAH 14 does not satisfy the County's current spacing requirements for a
full- movement intersection. However, it does satisfy spacing requirements for the right- in/right-
out operation. Another access option involves the combination of two access points into one full
access intersection. Therefore, during planning for the upgrading of CSAH 14 to a four -lane
divided urban facility, all options for access should be reviewed and studied in detail to
determine the best access provisions for this particular area.
•
•
•
Q: Would adequate traffic operations be provided at the following intersections upon full
completion of the proposed development?
• CSAH 14 /CSAH 23
• CSAH 14/4`h Avenue North
• CSAH 23 /Pine Street
• CSAH 14 /development access
• Pine Street /development access
To address this question, AM and PM peak hour capacity analyses, using the Highway Capacity
Software (HCS), were completed for the 2006 Existing, 2011 No- Build, and 2011 Build scenarios.
Analyses for the 2011 build scenario were completed using the geometry described in the Existing
Conditions section. In addition, the geometry used in the analyses for the proposed access to CSAH
14 consists of one left -right turn lane on the north approach, one through lane and one right turn lane
on the east approach, and one through -left turn lane on the west approach. The geometry used in the
analyses for the proposed access to Pines Street consists of a left -right turn lane on the south approach,
a through -left turn lane on the east approach, and a through -right turn lane on the west approach.
Capacity analysis results are presented in terms of level of service (LOS), which ranges from A to F.
LOS A represents the best intersection operation, with very little delay for each vehicle using the
intersection. LOS F represents the worst intersection operation with excessive delay. Results of the
capacity analyses are presented in Table 2 and Table 3.
Table 2
Weekday A.M. Peak Hour Levels of Service
Northbound
Southbound
Eastbound
Westbound
CR 23 /CR 14
LT
TH
RT
LT
TH
RT
LT
TH
RT
LT
TH
RT
2006
B
B
B
C
C
C
C
C
B
C
C
A
2011 no build
C
C
B
E
E
B
E
E
B
D
D
B
2011 build
C
C
B
F
F
B
F
F
C
E
E
B
2011 build signal
control
B
B
A
B
B
A
B
B
A
C
C
A
CR 23/Pine St
LT
TH
RT
LT
TH
RT
LT
TH
RT
LT
TH
RT
2006
A
A
-
-
A
A
B
-
B
-
-
-
2011 no build
A
A
-
-
A
A
B
-
B
-
-
-
2011 build
A
A
-
-
A
A
B
-
B
-
-
-
CR 14 /4a` Ave
LT
TH
RT
LT
TH
RT
LT
TH
RT
LT
TH
RT
2006
B
B
B
C
C
C
A
A
A
A
A
A
2011 no build
C
C
C
C
C
C
A
A
A
A
A
A
2011 build
C
C
C
C
C
C
A
A
A
A
A
A
Pine St/access
LT
TH
RT
LT
TH
RT
LT
TH
RT
LT
TH
RT
2011 build
A
-
A
-
-
-
-
A
A
A
A
-
CR 14 /access
LT
TH
RT
LT
TH
RT
LT
TH
RT
LT
TH
RT
2011 build
-
-
-
C
-
C
A
A
-
-
A
A
•
•
•
Table 3
Weekday P.M. Peak Hour Levels of Service
As indicated in Table 2 and Table 3, adequate level of service will be provided at all
intersections with the exception of the CSAH 14 /CSAH 23 intersection.
The CSAH 14 /CSAH 23 intersection is approaching capacity under existing PM traffic volumes
and is expected to experience level of service problems (i.e. excessive delay) during the PM peak
period under the 2011 No -Build volumes. This difficulty will increase with 2011 Build volumes.
During the AM peak period, this intersection is expected to approach capacity under 2011 No-
Build volumes, and experience level of service problems under 2011 Build volumes.
As part of this analysis, the peak hour traffic signal warrant requirements were reviewed for the
study scenarios. Based on the un- factored warrant requirements, 2006 Existing, 2011 No- Build,
and 2011 Build scenarios satisfy the peak hour volume warrant for the AM and PM peak hours.
With a signal in- place, this intersection will function at LOS C or better.
Traffic Operations Impacts for Lino Lakes Elementary School
The school has two existing full movement access points on CSAH 14. The western access is
signed for exiting movements only while the eastern access is used for both entering and exiting
movements. The site is currently signed for east to west flow through the drop -off lane and the
parking lot.
As shown in Figure 6, the recommended access plan includes closure of the western access and
the construction of a connection road to the proposed development roadway system. Under this
plan, all school traffic would still enter at the east access point. Two options for exiting traffic
are:
Northbound
Southbound
Eastbound
Westbound
CR 23 /CR 14
LT
TH
RT
LT
TH
RT
LT
TH
RT
LT
TH
RT
2006
E
E
B
C
C
B
C
C
B
D
D
B
2011 no build
F
F
C
C
C
C
E
E
B
F
F
B
2011 build
F
F
C
D
D
C
F
F
B
F
F
B
2011 build signal
control
D
D
A
B
B
A
D
D
A
C
C
A
CR 23/Pine St
LT
TH
RT
LT
TH
RT
LT
TH
RT
LT
TH
RT
2006
A
A
-
-
A
A
B
-
B
-
-
-
2011 no build
A
A
-
-
A
A
B
-
B
-
-
-
2011 build
A
A
-
-
A
A
B
-
B
-
-
-
CR 14/4`h Ave
LT
TH
RT
LT
TH
RT
LT
TH
RT
LT
TH
RT
2006
C
C
C
C
C
C
A
A
A
A
A
A
2011 no build
D
D
D
C
C
C
A
A
A
A
A
A
2011 build
D
D
D
C
C
C
A
A
A
A
A
A
Pine St/access
LT
TH
RT
LT
TH
RT
LT
TH
RT
LT
TH
RT
2011 build
A
-
A
-
-
-
-
A
A
A
A
-
CR 14 /access
LT
TH
RT
LT
TH
RT
LT
TH
RT
LT
TH
RT
2011 build
-
-
-
D
-
D
A
A
-
-
A
A
As indicated in Table 2 and Table 3, adequate level of service will be provided at all
intersections with the exception of the CSAH 14 /CSAH 23 intersection.
The CSAH 14 /CSAH 23 intersection is approaching capacity under existing PM traffic volumes
and is expected to experience level of service problems (i.e. excessive delay) during the PM peak
period under the 2011 No -Build volumes. This difficulty will increase with 2011 Build volumes.
During the AM peak period, this intersection is expected to approach capacity under 2011 No-
Build volumes, and experience level of service problems under 2011 Build volumes.
As part of this analysis, the peak hour traffic signal warrant requirements were reviewed for the
study scenarios. Based on the un- factored warrant requirements, 2006 Existing, 2011 No- Build,
and 2011 Build scenarios satisfy the peak hour volume warrant for the AM and PM peak hours.
With a signal in- place, this intersection will function at LOS C or better.
Traffic Operations Impacts for Lino Lakes Elementary School
The school has two existing full movement access points on CSAH 14. The western access is
signed for exiting movements only while the eastern access is used for both entering and exiting
movements. The site is currently signed for east to west flow through the drop -off lane and the
parking lot.
As shown in Figure 6, the recommended access plan includes closure of the western access and
the construction of a connection road to the proposed development roadway system. Under this
plan, all school traffic would still enter at the east access point. Two options for exiting traffic
are:
•
•
•
• Allow exiting traffic to flow back to the east access point through the parking lot. The
existing parking lot drive aisle is wide enough for safe two way traffic flow, which would
allow exiting traffic the opportunity to exit at the same location where they entered the
site.
• Exit to the proposed development roadway system and then access CSAH 14 at the new
proposed access location.
For the latter option, further investigation was completed to determine how the new access
would operate with both residential and school traffic volumes. School district staff indicated
there are approximately 435 students at the Lino Lakes elementary school. School district staff
also indicated that approximately 375 of the students are bussed to school each day. The
remaining 60 students are dropped off and picked up by a parent. This results in approximately
60 passenger cars and 10 school busses accessing the site to drop off or pick up students in both
the morning and afternoon.
The elementary school day starts at 9:15 AM, with bus drop -off occurring between 9:00 and 9:10
AM. The school day ends at 3:30 PM, with the buses departing at 3:40 PM. As noted earlier in
this report, the weekday AM peak hour for the surrounding roadway system is 7:00 to 8:00 AM
and the PM peak hour is 4:30 to 5:30 PM. Therefore, the vast majority of school traffic occurs at
times other than either peak hour. During the AM peak hour, which ends one full hour before
students are dropped off, very few school trips would occur. A similar time difference occurs for
the PM peak hour.
Even if 50 percent of the school traffic exited during the peak hours, which is very unlikely
considering the time difference, all movements at the CSAH 14 intersection with the proposed
access point operate at the same levels of service as shown in Tables 2 and 3. During both the
AM and PM peak hours, the maximum expected queue length is 50 feet on the southbound
approach. Therefore, the intersection is expected to operate in an acceptable manner in the 2011
Build condition.
•
•
5.0 Conclusions and Recommendations
Based on the information presented in this report, we have established the following basic
conclusions:
• Upon full completion of the Nature's Refuge residential development, adequate traffic
operations will be provided at the proposed development access locations and the
following studied intersections:
• CSAH 14/4`h Avenue North
• CSAH 23 /Pine Street
• CSAH 14 /development access
• Pine Street /development access
• Analysis indicates that the CSAH 14 /CSAH 23 intersection is currently approaching
capacity and will experience excessive delays under the 2011 No -Build traffic volumes.
These delays will increase upon the addition of the proposed development traffic. As
described in the report, the peak hour volume signal warrant is satisfied during the AM
and PM peak hours for all scenarios. Under traffic signal operation and existing
geometry, the intersection will operate at LOS C or better. We recommend that the
feasibility of installing a signal be further investigated through the completion of a full
signal justification report.
• A cooperative effort between the County, City and developer is needed to arrive at a long
term solution for the proposed access to CSAH 14. As proposed, the development access
to CSAH 14 does not satisfy the County's current spacing requirements for a full -
movement intersection. However, it does satisfy spacing requirements for the right -
in/right -out operation. Another access option involves the combination of two access
points into one full access intersection. Therefore, during planning for the upgrading of
CSAH 14 to a four -lane divided urban facility, all options for access should be reviewed
and studied in detail to determine the best access provisions for this particular area.
•
ATTACHMENT C
(Archeological Survey Report)
•
•
•
•
PHASE I ARCHAEOLOGICAL SURVEY AND
ARCHITECTURAL HISTORY ASSESSMENT
FOR THE NATURE'S REFUGE DEVELOPMENT,
LINO LAKES, ANOKA COUNTY, MINNESOTA
Submitted to:
Oakwood Land Development
Submitted by:
The 106 Group Ltd.
May 2006
•
•
•
PHASE I ARCHAEOLOGICAL SURVEY AND
ARCHITECTURAL HISTORY ASSESSMENT FOR THE
NATURE'S REFUGE DEVELOPMENT,
LINO LAKES, ANOKA COUNTY, MINNESOTA
SHPO File Number: Pending
The 106 Group Project Number: 06 -17
Submitted to:
Oakwood Land Development
1611 Highway 10 NE
Spring Lake Park, MN 55432
Submitted by:
The 106 Group Ltd.
The Dacotah Building
370 Selby Avenue
St. Paul, MN 55102
Report Authors:
Katherine A. Guidi, M.A. and William E. Stark, M.A.
May 2006
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page i
MANAGEMENT SUMMARY
During May of 2006, The 106 Group Ltd. (The 106 Group) conducted a Phase I
archaeological survey and architectural history assessment for the Nature's Refuge
Development project. The proposed project consists of the construction of 278
residential houses on varying sized lots surrounded by a nature conservation area. The
survey was conducted under contract with Oakwood Land Development. The project
will require completion of an Environmental Assessment Worksheet (EAW). This report
is intended to provide preliminary cultural resources information for completion of the
EAW and to assist in future compliance requirements under federal and state law.
Furthermore, this project will require a United States Army Corps of Engineers (USACE)
wetland permit and, therefore, must comply with Section 106 of the National Historic
Preservation Act of 1966, as amended. Because there is federal involvement in this
project, consultation with and between the USACE and Minnesota State Historic
Preservation Office (SHPO) will be required.
The project is located in the east Y2 of Section 5, Township 31N Range 22W, City of Lino
Lakes, Anoka County, Minnesota. Due to the proximity of the project area to the Rice
Creek Chain of Lakes Archaeological District, a Phase I archaeological investigation was
deemed necessary. The purpose of the Phase I archaeological investigation was to
determine whether the project area contains previously recorded or unrecorded intact
archaeological resources that may be potentially eligible for listing on the National
Register of Historic Places (NRHP). The purpose of the architectural history assessment
was to identify any historic buildings or structures within the project area of the Nature's
Refuge Development project that require further investigation in order to determine their
potential eligibility for listing on the National Register of Historic Places (NRHP) and to
eliminate those properties that are clearly not eligible.
The area of potential effect (APE) for archaeology is the same as the project area and
includes all areas of proposed construction activities or other potential ground disturbing
activities associated with construction of the Nature's Refuge Development. The Phase I
archaeological investigation consisted of a review of documents of previously recorded
sites within one mile (1.6 kilometers) of the project area and of previously conducted
surveys within the project area, as well as a Phase I archaeological field survey to identify
any intact archaeological sites within the APE. The archaeological survey consisted of a
visual reconnaissance of the entire project area to identify areas of high potential for
containing intact archaeological sites and shovel testing in high potential areas with poor
ground surface visibility. The project area includes approximately 240 acres (97
hectares) within the Anoka Sand Plain, Undulating archaeological sub - region. Due to the
high water table, standing water and the lack of topographically prominent features, only
one acre (0.4 hectares) of the 240 acres (97 hectares) was archaeologically tested. K.
Anne Ketz, M.A., RPA, served as Principal Investigator for archaeology.
•
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page ii
The study area for architectural/historical properties included all properties located within
the project area. Should the project be altered from the present proposal, the study area
for architectural history will need to be adjusted as appropriate. The architectural history
assessment included background research and a visual reconnaissance of the survey area.
William E. Stark, M.A. served as Principal Investigator for architectural history.
During the Phase I archaeological survey for the Nature's Refuge Development project,
no archaeological materials were identified. Therefore, The 106 Group recommends no
further testing within the current project area.
The 106 Group identified three buildings within the project area older than 45 years of
age. Three houses were constructed in the 1960s and one house is believed to be a circa -
1900 farmhouse, but has been significantly altered by modern modifications. The
properties have low potential to be eligible for listing on the NRHP.
•
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page iii
TABLE OF CONTENTS
MANAGEMENT SUMMARY i
LIST OF TABLES iv
1.0 INTRODUCTION 1
2.0 METHODS 4
2.1 OBJECTIVES 4
2.2 BACKGROUND RESEARCH 4
2.3 ARCHAEOLOGICAL FIELD METHODS 4
2.3.1 Shovel Testing 5
2.4 ARCHITECTURAL HISTORY METHODS 5
3.0 LITERATURE SEARCH 6
3.1 PREVIOUS ARCHAEOLOGICAL STUDIES 6
3.2 PREVIOUS ARCHITECTURAL HISTORY INVESTIGATIONS 6
3.3 ENVIRONMENTAL HISTORY OVERVIEW 6
4.0 RESULTS 8
4.1 ARCHAEOLOGY 8
4.1.1 Work Summary 8
4.1.2 Results 8
4.2 ARCHITECTURAL HISTORY 10
5.0 RECOMMENDATIONS 13
REFERENCES CITED 14
APPENDIX A: PHOTOGRAPHS OF ARCHITECTURAL HISTORY PROPERTIES
APPENDIX B: PROJECT PERSONNEL
•
•
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Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page iv
LIST OF FIGURES
FIGURE 1. PROJECT LOCATION 2
FIGURE 2. ARCHAEOLOGICAL TEST LOCATIONS 9
FIGURE 3. ARCHITECTURAL HISTORY RESULTS 12
LIST OF TABLES
TABLE 1. PREVIOUSLY IDENTIFIED ARCHAEOLOGICAL SITES WITHIN ONE MILE OF THE PROJECT AREA 6
TABLE 2. PROPERTIES 45 YEARS IN AGE OR OLDER WITHIN STUDY AREA 11
•
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 1
1.0 INTRODUCTION
During May of 2006, The 106 Group Ltd. (The 106 Group) conducted a Phase I
archaeological survey and architectural history assessment for the Nature's Refuge
Development project. The proposed project consists of the construction of 278
residential houses on varying sized lots surrounded by a nature conservation area. The
survey was conducted under contract with Oakwood Land Development. The project
will require completion of an Environmental Assessment Worksheet (EAW). This report
is intended to provide preliminary cultural resources information for completion of the
EAW and to assist in future compliance requirements under federal and state law.
Furthermore, this project will require a United States Army Corps of Engineers (USACE)
wetland permit and, therefore, must comply with Section 106 of the National Historic
Preservation Act of 1966, as amended. Because there is federal involvement in this
project, consultation with and between the USACE and Minnesota State Historic
Preservation Office (SHPO) will be required.
The project is located in the E 1/2 of Section 5, Township 31N Range 22W, City of Lino
Lakes, Anoka County, Minnesota (Figure 1). The UTM coordinates for the project area
are Zone 15, northeast corner: E 492077 N 5006163; southeast corner: E 491990 N
5005113; southwest corner: E 491227 N 5004607; and northwest corner: E 491262 N
5005792. All UTM coordinates were obtained electronically through the use of
Topozone (http: / /www.topozone.com).
The purpose of the Phase I archaeological investigation was to determine whether the
project area contains previously recorded or unrecorded intact archaeological resources
that may be potentially eligible for listing on the National Register of Historic Places
(NRHP). The purpose of the architectural history assessment was to identify any historic
buildings or structures within the study area of the Nature's Refuge Development project
that require further investigation in order to determine their potential eligibility for listing
on the NRHP and to eliminate those properties that are clearly not eligible.
Due to the proximity of the project area to the Rice Creek Chain of Lakes Archaeological
District, a Phase I archaeological investigation was deemed necessary. The area of
potential effect (APE) for archaeology is the same as the project area and includes all
areas of proposed construction activities or other potential ground disturbing activities
associated with construction of the Nature's Refuge Development (Figure 1). The Phase
I archaeological investigation consisted of a review of documents of previously recorded
sites within one mile (1.6 kilometers) of the project area and of previously conducted
surveys within the project area, as well as a Phase I archaeological field survey to identify
any intact archaeological sites within the APE. The archaeological survey consisted of a
visual reconnaissance of the entire project area to identify areas of high potential for
containing intact archaeological sites and shovel testing in high potential areas with poor
ground surface visibility. The project area includes approximately 240 acres (97
hectares),
Source: USGS Quadrangles. 7.5 Minute Series. Circle Pines, MN 1967; Centerville, MN 1967.; SHPO
Nature's Refuge Development Project
Alk Phase I Archaeological Survey and
Architectural History Assessment
Anoka County, Minnesota
0 0.25 0.5 0.75 1
Miles
Key
O Project Location
Archaeology Study Area (One Mile)
Previously Recorded Archaeological Site
Project Location
Figure 1
•
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 3
within the Anoka Sand Plain, Undulating archaeological sub - region. Due to the high
water table, standing water and the lack of topographically prominent features, only one
acre (0.4 hectares) of the 240 acres (97 hectares) was tested. K. Anne Ketz, M.A., RPA,
served as Principal Investigator for archaeology.
The study area for architectural/historical properties included all properties located within
the project area. Should the project be altered from the present proposal, the study area
for architectural history will need to be adjusted as appropriate. The architectural history
assessment included background research and a visual reconnaissance of the survey area.
William Stark, M.A. served as Principal Investigator for architectural history.
The following report describes project methodology, environmental setting, previous
investigations, results, and recommendations for the Nature's Refuge Development
project area. Because no archaeological resources were encountered during the survey,
the inclusion of contexts would be extraneous to the report; therefore, none are presented
here.
•
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 4
2.0 METHODS
2.1 OBJECTIVES
The primary objective of the Phase I archaeological investigation was to determine
whether the project area contains previously recorded or unrecorded intact archaeological
resources that may be potentially eligible for listing on the NRHP. All work was
conducted in accordance with the SHPO Guidelines for Archaeological Projects in
Minnesota (Anfinson 2001) and The Secretary of the Interior's Standards and Guidelines
for Archeology and Historic Preservation [48 Federal Register 44716 - 44740] (National
Park Service 1983).
The objective of the architectural history assessment was to identify any historic
buildings or structures within the study area of the Natures Refuge Development project
that require further investigation in order to determine their potential eligibility for listing
on the National Register of Historic Places (NRHP) and to eliminate those properties that
are clearly not eligible.
2.2 BACKGROUND RESEARCH
On April 28 of 2006, prior to the start of the field survey, staff from The 106 Group
conducted background research at the SHPO for information on previously identified
archaeological sites or architectural/historical properties within one mile (1.6 km) of the
project area and on surveys previously conducted within the project area. In addition,
USGS topographic quadrangles, historical plat maps, aerial photographs, and data on
project soils were reviewed in order to assess the portions of the project area that
possessed a higher potential for containing archaeological sites.
2.3 ARCHAEOLOGICAL FIELD METHODS
Intensive field investigation focused on areas assessed as having a greater probability to
contain significant archaeological sites. These areas included undisturbed portions of the
project area:
• within 500 feet (ft.) (150 meters [m]) of an existing or former water source
of 40 acres (19 hectares) or greater in extent, or within 500 ft. (150 m) of a
former or existing perennial stream;
• located on topographically prominent landscape features;
• located within 300 ft. (100 m) of a previously reported site; or
• located within 300 ft. (100 m) of a former or existing historic structure or
feature (such as a building foundation or cellar depression).
Areas assessed as having a relatively low potential for containing archaeological
resources included inundated areas, former or existing wetland areas, poorly drained
areas, and areas with a 20 percent or greater slope. Low potential areas and areas in
•
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Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 5
which Holocene (less than 10,000 years old) deposits have been significantly disturbed
were excluded from intensive field survey.
2.3.1 Shovel Testing
Shovel tests were excavated in areas exhibiting greater potential to contain intact
archaeological deposits where less than 25 percent of the ground surface was visible.
Tests were small, circular excavations, measuring approximately 35 to 45 centimeters
(cm) in diameter. A 15 — 30 m (50 — 100 ft.) testing interval was employed for shovel
tests, with test transects placed 15 m (50 ft.) apart.
All excavated soil matrices were passed through 1/4-inch hardware mesh to ensure the
consistent recovery of artifacts. Tests were excavated down to the C horizon, the level of
culturally sterile subsoil, or the water table.
Survey data were recorded through standardized forms and the field director's daily log.
Recorded information included: test locations and methods of testing; the numbers, types
and locations of recovered cultural materials; the depth of shovel tests and the thickness
of excavated soil layers; soil textures and inclusions (both natural and cultural); and soil
color according to Munsell® color charts.
2.4 ARCHITECTURAL HISTORY METHODS
During the field survey, the field surveyors completed an inventory of the buildings and
structures within the project area in order to identify properties that appeared to be 45
years of age or older. Those resources were photographed and assessed for historical
integrity. Along with professional field observations, the Anoka County tax assessor's
office web site database was used to determine the approximate date of construction.
•
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Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 6
3.0 LITERATURE SEARCH
3.1 PREVIOUS ARCHAEOLOGICAL STUDIES
Research indicated that no archaeological surveys have been conducted within the project
area.
No sites have been recorded (confirmed), and no sites have been reported (not field
checked) within the current project area. One site had been recorded (confirmed), and no
sites have been reported (not field checked) within one mile of the project area (see Table
1).
In 1977, an artifact scatter (21AN110) was identified. This site is located on a blow -out
on a high, level area northwest of George Watch Lake. A surface inspection was
conducted in the blow -out area and no shovel tests were excavated at the site. Three
flakes were recovered from 21AN110, two chert and one quartzite. No ceramics were
recovered. (Minnesota Archaeological Site File, 21AN110, on file at the SHPO).
TABLE 1. PREVIOUSLY IDENTIFIED ARCHAEOLOGICAL SITES WITHIN ONE MILE OF THE
PROJECT AREA
Site No.
Site Name
T
R
S
' Section
Description
21AN110
N/A
31N
22W
8
SW, NW, SE, SE
Lithic Scatter
3.2 PREVIOUS ARCHITECTURAL HISTORY INVESTIGATIONS
Research indicated that no architectural history surveys have been conducted within the
project area and no previously recorded architectural history properties are located within
the project area.
3.3 ENVIRONMENTAL HISTORY OVERVIEW
The Nature's Refuge Development project area is located in Section 5, Township 31N,
Range 22W, City of Lino Lakes, Anoka County, Minnesota. The housing development
will be constructed in a low- lying, relatively flat wooded area adjacent to a wetland.
Geologically, the project area lies within the Anoka Sand Plain, Undulating geomorphic
region. The project area is situated within the SSPL soil landscape unit, described as
sandy over sandy, poorly drained, light colored soils. The SSPL soil landscape unit
makes up approximately two percent of the Anoka Sand Plain, Undulating geomorphic
region (Agricultural Experiment Station 1977).
•
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Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 7
The soil associations for the project area include the Zimmerman- Isanti -Lino association
and the Rifle - Isanti association. The Zimmerman-Isanti -Lino association is found on
nearly level to undulating, excessively drained, somewhat poorly drained and very poorly
drained soils that are dominated by fine sands throughout (Agricultural Experiment
Station 1977). The Rifle - Isanti Association is found on nearly level, very poorly drained
soils formed in organic material and fine sand (Agricultural Experiment Station 1980).
•
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Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 8
4.0 RESULTS
4.1 ARCHAEOLOGY
4.1.1 Work Summary
Staff from The 106 Group conducted a Phase I archaeological survey of the Nature's
Refuge Development project area from May 2 to May 3, 2006. K. Anne Ketz, M.A.,
RPA, served as Principal Investigator. Katherine A. Guidi, M.A. served a Field
Supervisor and conducted the fieldwork with Christopher Moose, B.S., and Ayla
Aymond, B.A.
Field methods included an initial visual reconnaissance of the entire project area to assess
areas of archaeological potential, followed by shovel testing in areas with low - visibility
that were assessed as having a high probability to contain intact archaeological resources.
Field conditions presented a less than 15 percent surface visibility over a low- lying,
relatively flat, wooded area adjacent to a wetland. There were also various low -lying
areas filled with standing water or deep mud. Approximately 239 acres (96.7 hectares)
were determined to have low archaeological potential due to the high water table,
standing water and/or lack of topographical prominence. Three areas within the project
area were determined to have high potential for archaeological resources based on higher
elevation in conjunction to their vicinity to standing water (Figure 2).
For ease of reference, those portions of the project area that were considered to have high
potential for containing intact archaeological resources, and were therefore subject to
shovel testing, were designated Survey Areas A, B, and C (Figure 2). The three areas of
high archaeological potential encompassed approximately one acre (0.4 hectares). All
three areas are located in a cleared grassy area in the approximate center of the project
area adjacent to a wetland. A total of 28 shovel tests were excavated in the three areas,
the results of which are discussed individually below.
4.1.2 Results
A total of 28 shovel tests were excavated in the three areas of high archaeological
potential; however, no archaeological sites were identified within the project area.
Area A was comprised of two transects placed at 15 m (50 ft.) intervals. Thirteen shovel
tests were excavated in this 0.5 -acre (0.2 hectares) area. The shovel tests were excavated
to an average depth of 65 centimeters below surface (cmbs), and showed uniformity in
soil composition. The A horizon was a dark brown to dark yellowish brown (10YR 3/3 —
10YR 3/6) sandy loam, which overlaid the heavily mottled B horizon with a general
matrix of dark yellowish brown to light yellowish brown (10YR 4/4 — 10YR 6/4) sand
mottled with a brown (7.5YR 4/4) sand and a light gray (10YR 7/2) sand. The C horizon
was not encountered in any of the shovel tests in Area A due to the high water table.
Source: Farm Services Administration (FSA) Color Orthophotos 2003 -2004; The 106 Group Field Notes
Nature's Refuge Development Project
*Phase I Archaeological Survey and
Architectural History Assessment
Anoka County, Minnesota
0 0.09 0.18 0.27 0.36
Miles
Archaeological Test Locations
Key
O Project Location
o Archaeological Test Locations
Figure 2
•
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 10
The water table was encountered in twelve of the shovel tests at an average depth of 56
cmbs. No archaeological materials were encountered in Area A. Area B encompassed
three transects placed at 15 m (50 ft.) intervals. Nine shovel tests were excavated in this
0.3 -acre (0.1 hectare) area. The shovel tests were excavated to an average depth of 97
cmbs, and showed uniformity in soil composition. The A horizon was a dark yellowish
brown to a dark grayish brown (10YR 3/6 — 10YR 4/2) sandy loam, which overlaid the B
horizon of a yellowish brown to light yellowish brown (10YR 5/4 — 10YR 6/4) sand. The
C horizon was not encountered in any of the shovel tests in Area B due to the high water
table. The water table was encountered in two of the shovel tests at an average depth of
85 cmbs. No archaeological materials were encountered in Area B.
Area C encompassed three transects placed at 15 m (50 ft.) intervals. Six shovel tests
were excavated in this .2 -acre (.1 hectare) area. The shovel tests were excavated to an
average depth of 87 cmbs, and showed uniformity in soil composition. The A horizon
was a brown to dark yellowish brown (10YR 4/3 — 10YR 4/4) sandy loam, which
overlaid the B horizon of light brownish gray (10YR 6/2) sand mottled with a dark
yellowish brown (10YR 4/4) sand. The C horizon was encountered in two of the shovel
tests and had a general matrix of a light brownish gray (10YR 6/2) sand mottled with a
brown (7.5YR 4/4) sand and a light gray (10YR 7/2) sand. The water table was
encountered in five of the shovel tests at an average depth of 79 cmbs. No archaeological
materials were encountered in Area C.
4.2 ARCHITECTURAL HISTORY
The 106 Group identified four properties within the project area that are 45 years in age
or older (Figure 3; Table 2). All of the properties in the project area are residential,
comprised of single - family houses. One house (Field No. 1) was constructed in 1900
according to the Anoka County tax assessor web site. Historical plat maps dating to 1914
(Webb) illustrate a structure near that location on the 160 -acre parcel owned by Rich
Gibbs. Although this house may be associated with that farm, it has since been
significantly altered by the application of vinyl siding, replacement and re- sizing of
windows, and the removal of all original architectural details. The three remaining
houses were constructed in the 1960s and exemplify both the architectural styles of tract
housing and the pattern of exurban settlement during that period.
All of the properties located within the project area have low potential to be eligible for
listing on the NRHP. Photographs of the properties are located in Appendix A.
•
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 11
TABLE 2. PROPERTIES 45 YEARS IN AGE OR OLDER WITHIN STUDY AREA
Field
No.
Address
Number of
Buildin s
g
Building Types
Dates
(Estimated)
Recommended
for Further
Study?
1
601 Main
2
Two -story, side - gabled house;
garage
c. 1900
No
2
625 Main
1
One -story, hipped -roof house
1961
No
3
635 Main
1
One - and -a- half -story, split -level
house
1961
No
4
697 Main
1
One -story, hipped -roof house
1963
No
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PINE.
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ir
1 * w
*
1
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).•••.‘
1
1
w,w;w.iww,„kwwwww---
*..,
1
1
Property 2
Property 1
• •
*,
• 5 o
;
1
it■ a
!! (rD I
NO
1011111410 ▪ MI**
Ile *VON
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•
•
1
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•
Property 4
•
a
Source: USGS Quadrangles. 7.5 Minute Series. Circle Pines, MN 1967; Centerville, MN 1967.; SHPO
•
a
•
•
v
1'77—WPM-
P • is IN II
0
Nature's Refuge Development Project
*Phase I Archaeological Survey and
WArchitectural History Assessment
Anoka County, Minnesota
0 0.1 0.2 0.3 0.4
Miles
Key
0 Project Location
Architectural History Results
Figure 3
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 13
5.0 RECOMMENDATIONS
During May of 2006, The 106 Group conducted a Phase I archaeological survey and
architectural history assessment for the Nature's Refuge Development project. The
proposed housing development project area encompassed 240 acres (97 hectares), of
which one acre (0.4 hectares) was tested for archaeological resources. Shovel testing was
performed within three identified areas of high archaeological potential. A total of 28
shovel tests were excavated to an average depth of 83 cmbs, but no archaeological
materials were recovered. Based on the lack of archaeological materials found within the
surveyed areas, no further archaeological work is recommended prior to construction of
the proposed project.
The 106 Group identified three buildings within the project area older than 45 years of
age. Three houses were constructed in the 1960s and one house is believed to be a circa -
1900 farmhouse, but has been significantly altered by modern modifications. The
properties have low potential to be eligible for listing on the NRHP.
•
•
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Page 14
REFERENCES CITED
Agricultural Experiment Station
1977 Soil Survey of Anoka County, Minnesota. Agricultural Experiment Station,
University of Minnesota, St. Paul.
1980 Minnesota Soil Atlas: Stillwater Sheet. Miscellaneous Report #171.
Agricultural Experiment Station, University of Minnesota, St. Paul.
Anfinson, Scott F.
2001 SHPO Guidelines for Archaeological Projects in Minnesota. State Historic
Preservation Office, St. Paul.
Foote, C. M.
1887 Map of Ramsey and Washington Counties with adjacent parts of Anoka,
Dakota, & Hennepin Counties, and parts of St. Croix and Pierce Counties,
Wisconsin. Minneapolis.
National Park Service
1983 Secretary of the Interior's Standards and Guidelines for Archeology and
Historic Preservation. Federal Register 48(190): 44716 - 44740.
Webb Publishing Company
1914 Atlas and farmers' directory of Anoka County and the eleven northern
townships of Hennepin County, Minnesota. St. Paul.
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
•
APPENDIX A: PHOTOGRAPHS OF
ARCHITECTURAL HISTORY PROPERTIES
•
•
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Property 1, 601 Main Street
Property 2, 625 Main Street
•
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
Property 3, 635 Main Street
Property 4, 697 Main Street
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
APPENDIX B: PROJECT PERSONNEL
•
Principal Investigators
Archaeology
Architectural History
Project Manager
Field Supervisor
Field Archaeologists
Graphics and GIS
•
•
Nature's Refuge Development
Phase I Archaeological Survey and Architectural History Assessment
LIST OF PERSONNEL
K. Anne Ketz, M.A., RPA
William E. Stark, M.A.
Jennifer Bring, B.A.
Katherine A. Guidi, M.A.
Christopher Moose, B.S.
Ayla Aymond, B.A.
Matthew Schillerberg