HomeMy WebLinkAboutItem 10 - VBWD Memo
Valley Branch Watershed District Permit Review Memorandum
Subject: Easton Village, Permit 2015-05 Applicant & Owner: Tom Wolter, Easton Village, LLC Authorized Agent/Engineer: Todd A. Erickson, PE, Erickson Civil Site Date: February 20, 2015 Barr Project No.: 23/82-0020.00 2200 347
Location: South of railroad, west of Manning Avenue, north of 30th Street North, Lake Elmo Section/Township/Range: Southeast quarter of Section 13, Township 29 North, Range 21 West Project Purpose: Overall, the project will subdivide 98 acres into 218 single-family
residential lots, approximately 0.2 acres in size. Work will include construction of roads, sidewalks, trails, sanitary sewer, water, and
stormwater management facilities, including one large infiltration
basin and one small infiltration basin; 20.1 acres of new impervious
surfaces are proposed.
In Phase 1, 71 single-family homes and associated infrastructure are
proposed along the south side of the site. The small wet pond and
infiltration basin at the southwest corner and a majority of the large wet pond and all of the large infiltration basin on the east side will be constructed.
A trunk sewer line from Reid Park to the railroad will be constructed
along the west side of the site.
Background:
The Managers approved permit 2014-02 on August 14, 2014, for this project. Since then, the developer’s
engineer has made several revisions, but the overall project remains very similar. While the Managers might
not need to re-issue a permit for the subdivision, the project now includes the trunk sewer from Reid Park to
the railroad. Because of the revisions and because VBWD permits are invalid if work does not begin within
one year of issuance, I suggest that the Managers review the project again and consider issuing a new
permit.
Select plan sheets of the overall plans, Phase 1 plans, and trunk sewer plans are attached and have been
reviewed for conformance to the VBWD rules and regulations.
Conformance Summary:
Issue Conforms to
VBWD &
WCA Rules?
Comments Stormwater Management Rate Yes
Volume See
Comments
See Suggested Site-Specific Conditions 2 and 3.
Quality
Maintenance Agreement No See Suggested Site-Specific Condition 4.
Easement Yes See Standard Conditions 9 and 11.
Erosion Control Plan See comment See Standard Conditions 4-8.
To: VBWD Managers From: John Hanson Subject: Easton Village, Permit 2015-05 Date: February 20, 2015 Page: 2 Project: 23/82-0020.00 2200 347 c: Ray Marshall, Ray Roemmich, Melissa Imse
Issue Conforms to
VBWD &
WCA Rules?
Comments Wetland Management & Buffers Delineation NA
MNRAM Evaluation NA
Classification NA
Filling/Sequencing NA
Excavating NA
Buffers NA
Hydrology NA
Replacement Plan NA
Banking Plan NA Floodplain Management 100-Year Flood Level Yes
Minimum Floor
Elevations
Filling within Floodplain NA
Easement Yes See Standard Conditions 9 and 10.
Permit Fee Yes $15,728 submitted in June 2014.
Surety See comment See Suggested Site-Specific Condition 6. The surety is estimated
at $200,000.
Note: This review is based on these plan sheets:
• Erickson Civil Easton Village Phase 1 Trunk Utility Plan:
o Plan Sheets C1, C4, and C5 dated 01/07/2015
o Plan Sheets C2, C3, and C6 dated 02/20/2015
• Erickson Civil Easton Village Phase 1-Grading and Erosion Control Plans, Sheets C1-C13 dated
02/20/2015
• Erickson Civil Easton Village Preliminary Plat Grading Plan dated 02/18/2015
Suggested Site-Specific Conditions:
1. No construction shall start until all permit conditions are met. If the Valley Branch Watershed District
Board is not satisfied that the conditions are met, the permit will be revoked.
2. Details of the connection from the proposed large wet pond to the proposed infiltration basin shall be
provided and approved prior to construction.
3. The infiltration material specification shall be in conformance to MnDOT Specification 3877.1G, or an
equivalent specification approved by the VBWD.
4. This permit is not valid until a maintenance agreement in the general format of Appendix B of the VBWD
Rules is submitted to and approved by the VBWD Attorney.
5. The permit holder must obtain permission for any work outside of his property.
6. Prior to construction, the required surety shall be submitted.
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To: VBWD Managers From: John Hanson Subject: Easton Village, Permit 2015-05 Date: February 20, 2015 Page: 3 Project: 23/82-0020.00 2200 347 c: Ray Marshall, Ray Roemmich, Melissa Imse
Applicable Standard Conditions:
1. This permit is not transferable.
2. This permit is subject to obtaining all other permits required by governmental agencies having jurisdiction
(including a NPDES permit).
3. The VBWD Engineer and Inspector shall be notified at least three days prior to commencement of work.
4. Erosion controls shall be installed prior to the commencement of grading operations and must be
maintained throughout the construction period until turf is established. Additional erosion controls may
be required, as directed by the VBWD Inspector or VBWD Engineer.
5. The following additional erosion controls shall be implemented on the site:
a. All proposed slopes three-feet horizontal to one-foot vertical (3H:1V) should be covered with
erosion-control blanket.
b. Silt fence should follow existing contours as closely as feasible to limit the potential for gully
erosion along the edges.
c. Any sediment that collects in storm sewers, ponds, or other water management features shall be
removed.
d. Street sweeping shall be performed if sediment collects on streets.
e. If erosion occurs at the outlets of the storm sewer pipes, the applicant will be responsible for
correcting the problem to the satisfaction of the VBWD.
6. To prevent soil compaction, the proposed infiltration area shall be staked off and marked during
construction to prevent heavy equipment and traffic from traveling over it. If the infiltration facility is in
place during construction activities, sediment and runoff shall be kept away from the facility, using
practices such as diversion berms and vegetation around the facility’s perimeter. The infiltration facility
shall not be excavated to final grade until the contributing drainage area has been constructed and fully
stabilized. The final phase of excavation shall remove all accumulated sediment and be done by light,
tracked equipment to avoid compaction of the basin floor. To provide a well-aerated, highly porous
surface, the soils of the basin floor shall be loosened to a depth of at least 24 inches to a maximum
compaction of 85% standard proctor density prior to planting.
7. All disturbed areas shall be vegetated within 14 days of final grading.
8. The applicant is responsible for removal of all temporary erosion-control measures, including silt fence,
upon establishment of permanent vegetation at the project site as determined by the VBWD Engineer
and/or Inspector.
9. Valley Branch Watershed District shall be granted drainage easements which cover: (a) land adjacent to
stormwater management facilities, wetlands, and lowlands up to their 100-year flood elevations and (b) all
ditches, storm sewers, and maintenance accesses to the stormwater management facilities.
10. The minimum floor elevations for all buildable lots in the development shall be recorded in a Declaration
of Covenants and Restrictions or on the final plat.
11. The required drainage easements and access easements shall be recorded with the Washington County
Recorder’s Office.
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To: VBWD Managers From: John Hanson Subject: Easton Village, Permit 2015-05 Date: February 20, 2015 Page: 4 Project: 23/82-0020.00 2200 347 c: Ray Marshall, Ray Roemmich, Melissa Imse
12. Return or allowed expiration of any remaining surety and permit closeout is dependent on the permit
holder providing proof that all required documents have been recorded (including but not limited to
easements) and providing as-built drawings that show that the project was constructed as approved by
the Managers and in conformance with the VBWD rules and regulations.
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