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4a - PC Report 8286 Hidden Bay Trl Variance
STAFF REPORT DATE: 07/24/2023 REGULAR ITEM#: 4a – PUBLIC HEARING MOTION TO: Planning Commission FROM: Sophia Jensen, City Planner AGENDA ITEM: Variance Request – 8286 Hidden Bay Court INTRODUCTION: Jeff and Judy Otto (Applicants) submitted a variance application for three deviations from the City’s Shoreland Management Overlay District Code Section 105.12.1260 Table 17-3. The three requests are: 1) an increase in impervious surface for unsewered shoreland lots 2) A reduced ordinary high water level setbacks for a new home 3) A reduced ordinary high water level setback for a new septic system. These requests are for the property located at 8286 Hidden Bay Court North (Subject Property). Two of the variance requests are associated with the construction of a new single family home (3,583.33 sq. ft.) and driveway (1,775.72 sq. ft.). The existing home (2,055.59 sq. ft.) and driveway (1,775.72 sq. ft.) is considered a legal nonconformity because it is within the 100 foot ordinary high water level setback, and because the impervious surface maximum for unsewered shoreland lots is exceeded. The applicant could remodel and repair the existing home, within the existing footprint, without the need for the structure setbacks and impervious surface variance requests. The requests were made because of the applicants feel the home is outdated and it does not meet their desire to age-in-place with single level living. They are proposing to demolish the existing home and build a new larger house that would exceed the City Shoreland Requirements. The third variance request is associated with the septic system. The system is currently failing and the applicant needs to replace it. The existing septic is considered a legal nonconformity because it is within the 75’ ordinary high water level setback for septic systems. The applicant is proposing to move the new septic location closer to the water which would require a variance. When legal nonconformities are expanded or intensified they should be brought into compliance with current code requirements, not further deviated from. Below is a table outlining the required criteria, the existing conditions, and what the applicant is proposing: Required Existing Proposed Impervious Surface Coverage – Unsewered Lot 15% 18.3% 21.8% Structure Setback from OHWL 100’ 47.3’ 36.9’ Septic Setback from OHWL 75’ 51.3’ 38.3’ ISSUE BEFORE PLANNING COMMISSION: The Planning Commission is being asked to hold a public hearing, review, and make a recommendation on the three variance requests. 2 VARIANCE REQUEST DETAILS/ANALYSIS: Address: PID: Variance Requests: Existing Zoning: Surrounding Zoning: Deadline for Action: Applicable Regulations: 8286 Hidden Bay Court North 09.029.21.23.0013 The applicant is seeking deviations from LEC 105.12.1260 Table 17-3 which allows unsewered lots a maximum impervious surface coverage of 15%, requires structure setback from the OHWL to be 100 feet, and requires septic system setbacks from the OHWL to be 75 feet. Rural Single Family, Shoreland Overlay District, Valley Branch Watershed District North: Rural Single Family South: Rural Single Family East: Rural Single Family West: Rural Single Family Application Complete – 6/9/2023 60 Day Deadline – 8/8/2023 120 Day Extension - 10/7/2023Article V - Zoning Administration and Enforcement Article XI – Rural Districts Article XIX – Shoreland Overlay District REVIEW AND ANALYSIS/DRAFT FINDINGS: An applicant must establish and demonstrate compliance with the variance criteria set forth in Lake Elmo City Code Section 105.12.320 before the City may grant an exception or modification to city code requirements. These criteria are listed below, along with comments from Staff about the applicability of these criteria to the applicant’s request. 1)Practical Difficulties. A variance to the provision of this chapter may be granted by the Board of Adjustment upon the application by the owner of the affected property where the strict enforcement of this chapter would cause practical difficulties because of circumstancesunique to the individual property under consideration and then only when it is demonstratedthat such actions will be in keeping with the spirit and intent of this chapter. Definition ofpractical difficulties - “Practical difficulties” as used in connection with the granting of a variance, means that the property owner proposes to use the property in a reasonable manner not permitted by an official control. IMPERVIOUS SURFACE FINDINGS: The applicant argues that the existing lot is toosmall to construct a new home and driveway that meets their desire to age-in-place and meet impervious surface requirements. Staff finds that the existing home/driveway could be remodeled or refurbished without the need for a variance since it is a legal nonconformity. Otherwise, the lot could fit a smaller home and driveway within impervious surfacerequirements. The discrepancy here is that the applicants are proposing a new larger homeand driveway than code dictates, not that a home on this lot is not possible. Practical Difficulties are not met. 3 REDUCED STRUCTURE SETBACK FINDINGS: While a single family home is consistent with the zoning district. Staff finds that the complete demolition and reconstruction of a larger home and desire for a deck when an existing legal nonconforming home is already on site does not meet the practical difficulties requirement. Practical Difficulties are not met. REDUCED SEPTIC SETBACK FINDINGS: The current system is failing and the applicant has had a septic designer review the property for a feasible septic location. Staff finds that the applicant has proven practical difficulties since a septic is needed given the current failing system and there is no other feasible area on site. Practical Difficulties are met. 2) Unique Circumstances. The plight of the landowner must be due to circumstances unique to the property not created by the landowner. IMPERVIOUS SURFACE FINDINGS: The applicant argues that they need the main level garage and hammerhead driveway exactly as they proposed for safe access which would cause the impervious surface to increase. Staff finds that the reasoning for the garage and hammerhead driveway insufficient; the residence is at the end of a road where ample or fast moving traffic does not appear to be an impending safety concern. The applicant has the opportunity to refurbish the existing home, garage, and driveway footprint without the need for a variance. By completely redesigning the garage and driveway the applicant is creating the plight which they are requesting flexibility from. Unique Circumstances are not met. REDUCED STRUCTURE SETBACK FINDINGS: The applicant argues that the setbacks are excessively large on this property, and a portion of the property is below the ordinary high water level, leaving a small buildable area for a new home. Staff finds that these requirements are in place to protect the waterbody and prevent damage to structures. Many properties have land that fluctuates over or under the ordinary high water level based on environmental factors, these areas may be subject to flooding or act as a wetland buffer. The ordinary high water level setbacks apply to all properties on the designated water body and not unique to this lot. Given that the applicant is proposing to demolish the existing legal nonconforming home and is then requesting flexibility to move the structure closer they are creating the plight they are requesting flexibility from. Unique Circumstances are not met. REDUCED SEPTIC SETBACK FINDINGS: The applicant is proposing to replace the septic in roughly the same area of the property as the existing system. Again due to the fact this is a failing system, and the only location for a septic on the property Unique Circumstances are met. 3) Character of Locality. The proposed variance must not alter the essential character of the locality in which the property in question is located. IMPERVIOUS SURFACE FINDINGS: The applicant argues that the neighboring homes also exceed the imperious surface requirement and the single level house would be more accommodating to neighboring view sheds. Staff finds that many of the surrounding homes were build many years ago when different impervious surface and ordinary high water level regulations may have been in place. The request, if approved, would alter character of 4 locality by deviating from the City and DNR requirements put in place to protect the waterbody and structures built around them. Character of Locality is not met. REDUCED STRUCTURE SETBACK FINDINGS: The applicant argues that that many of the neighboring homes are within the required structure setback from the ordinary high water level. Staff finds that many of the surrounding homes were build many years ago and different setback and ordinary high water level regulations may have been in place. The City’s shoreland ordinance (105.12.1260(12)(c)) has exception for legal nonconforming buildings, where if structures exist on the adjoining lots on both sides of a proposed building site, structure setbacks may be altered without a variance to conform to the adjoining setbacks from the ordinary high water level. The existing home is already closer to the ordinary high water level than the adjacent structure to the west and the east side does not have a structure. The request, if approved, would alter character of locality by deviating from the City and DNR requirements put in place to protect the waterbody and the structures built around them. Character of Locality is not met. REDUCED SEPTIC SETBACK FINDINGS: Given this area does not have access to City Sewer and all adjacent properties are on private systems; Staff finds that approval of this request would not alter essential character of the neighborhood. Character of Locality is met. 4) Adjacent Properties and Traffic. The proposed variance must not impair an adequate supply of light and air to properties adjacent to the property in question or substantially increase the congestion of the public streets or substantially diminish or impair property values within the neighborhood. IMPERVIOUS SURFACE FINDINGS: The impervious surface increase should not increase congestion on a public street or negatively impair adjacent properties. Adjacent properties and Traffic is met. REDUCED STRUCTURE SETBACK FINDINGS: The reduced structure setback should not increase congestion on a public street or negatively impair adjacent properties. Adjacent properties and Traffic is met. REDUCED SEPTIC SETBACK FINDINGS: The proposed septic location should not increase congestion on a public street or negatively impair adjacent properties. Adjacent properties and Traffic is met. CITY AGENCY REVIEW: This request was distributed to several departments and agencies for review on June 12th 2023. The following departments provided comments on the variance request. • City Engineer Email (6/20/2023) provided no additional comments. • Fire Department Email (6/22/2023) provided comments regarding the address numbers of the home. This condition would be applied if the structure related variances are approved. 5 •Valley Branch Watershed District (6/26/2023) provided comments scrutinizing therequest. The applicants would need to raise the low floor elevation to be at least 2 feet higher than the OHWL. A minimum 35‐foot‐wide buffer strip measured perpendicular tothe OHWL extending 35 feet inland is required. A mowed access path and shoreline areallowed but must not exceed 30% of the landowner’s shoreline width or 30 feet,whichever is less. The watershed encourages stormwater management although it is notrequired. Lastly, they are requiring temporary erosion controls to be in place. These conditions related to the structure would be applied if the structure related variances areapproved. The 35 foot buffer strip would be applied if any of the variances are approved. •MN DNR Email (6/30/2023) provided commentary scrutinizing the proposal. The DNR was concerned regarding tree removal since the trees act as screening buffer and habitat for wildlife. The DNR was also concerned regarding the request for an increase inimpervious surface and recommended the driveway remain as-is. (This recommendationwould support staff’s findings listed above on the impervious surface request). The treereplacement condition would be applied if the structure related variances are approved. PUBLIC COMMENT: A hearing notice was sent to surrounding properties on July 12th 2023. A hearing notice was published in the local newspaper on July 14th 2023. Public comment received is attached to the report. FISCAL IMPACT: None RECOMMENDED CONDITIONS OF APPROVAL – SEPTIC REQUEST ONLY 1. The applicant must obtain all other necessary City, State, and other governing bodypermits and approvals prior to construction.2.A minimum 35‐foot‐wide buffer strip measured perpendicular to the OHWL extending 35 feet inland must be provided. A mowed access path and shoreline are allowed butmust not exceed 30% of the landowner’s shoreline width or 30 feet, whichever is less.3. This variance approval is only for a reduced septic setback from the ordinary high waterlevel to 38.3 feet.4. If approved, this variance shall expire if work does not commence within 12 months of the date of granting the variance. OPTIONS: The Planning Commission may: •Recommend approval of the variances, citing recommended findings of fact for approval. •Recommend approval of the variances with conditions citing recommended findings offact for approval. •Recommend denial of the variances, citing recommended findings of fact for denial. RECOMMENDATIONS: Staff recommends that the Planning Commission recommend denial of the structure setback and impervious surface variance request since they do not meet all four of the required criteria outlined above, and based upon agency review comments. Staff also recommends that the Planning 6 Commission recommend approval of the septic setbacks variance request since it does meet all four of the required criterial outlined above. “Move to recommend denial of the request from Jeff and Judy Otto for a variance to allow an impervious surface coverage of 21.8% for the property located at 8286 Hidden Bay Court based on the findings listed in the staff report.” “Move to recommend denial of the request from Jeff and Judy Otto for a variance to allow a reduced structure setback of 36.9 feet from the ordinary high water level for the property located at 8286 Hidden Bay Court based on the findings listed in the staff report.” “Move to recommend approval of the request, with conditions listed in the staff report, from Jeff and Judy Otto for a variance to allow a reduced septic system setback of 38.3 feet from the ordinary high water level for the property located at 8286 Hidden Bay Court based on the findings listed in the staff report.” ATTACHMENTS: 1)Location Map2)Land Use Application3)Certificate of Survey4)Written Statement5)Septic Design6)City Engineer Email (6/20/2023)7)Fire Department Email (6/22/2023)8)VBWD Email (6/26/2023)9)DNR Email (6/30/2023)10)Public Comment plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com Otto Residence Variance Application - Written Statements 8286 Hidden Bay CourtLake Elmo, Minnesota Lake Olson Lake Demontreville plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com TABLE OF CONTENTS Project Description Project Team Project Data Variance Request Summary Figure A | Proposed Architectural Site Plan Figure B | Proposed New Septic Site Plan and Design Variance Request Detailed Analysis Figure C | Existing Conditions and Existing Septic Figure D | Existing Conditions and New Septic Design Requirements Existing Photos and Proposed Renderings Figure E | Existing and Proposed View From Entry Drive Figure F | Existing and Proposed View From Rear Yard Figure G | Existing and Proposed View From Septic Field Propsed Certificate of Survey Figure H | Proposed Certificate of Survey plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com PROJECT DESCRIPTION June 9, 2023 Dear City of Lake Elmo Planning Department: Thank you for the opportunity to submit our application to you that includes a series of variance requests for a new proposed home at 8286 Hidden Bay Court in Lake Elmo for Jeff and Judy Otto. The parcel is located on the narrows separating Lake Demontreville and Olson Lake. A non-conforming home built in 1958 and non-compliant septic system from 1984 are currently on the property. Under LEC 105.04.690(b)(3) the septic system is non-compliant and is required to be updated. In designing the new home, the architecture team took great care to respect the boundaries of the existing footprint of the home, respect the necessary (and only viable) location of the new septic system (as detailed further below) and to the greatest extent possible mimic natural grade toward the lake. The proposed new home satisfies the required side yard and front yard setbacks. The existing split-level home with a tuck-under garage is quite dated, does not maximize the potential value of the lot and does not serve the owner’s desire to age-in-place with single-level primary living spaces. The owner and design team desired to respect neighboring viewsheds as much as possible. Therefore, instead of building up an additional level on the home (up to the permitted 35’ height limitation), the design team instead suggested a slight expansion of the existing footprint, as described within this application. Except for an uncovered deck, the proposed expansion of the new home was directed entirely away from the lake. Finally, A new soil treatment area is required due to the non-compliant drainfield north of the existing house. We sincerely thank you for your time and consideration and look forward to answering any additional questions that you may have. You may reach me directly at 651.336.1393 or at matt@plaadoffice.com. Sincerely, Matthew M. Byers, AIA plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com PROJECT TEAM Owner: Jeff and Judy Otto 8286 Hidden Bay Court Lake Elmo, Minnesota Architect: PLAAD, LLC Matthew Byers, AIA Ryan Andrews, Assoc. AIA 1229 Tyler Street NE, Suite 202 Minneapolis, MN 55413 651.336.1393 matt@plaadoffice.com ryan@plaadoffice.com Surveyor E.G. Rud & Sons, Inc. Professional Land Surveyors Jason Rud 6776 Lake Drive NE, Suite 110 Lino Lakes, MN 55014 651.361.8200 Septic Designer Kloeppner Services and Designs, LLC MPCA License # 4043 763.843.4114 connect@ksd-mn.com plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com PROJECT DATA Owner: Jeff and Judy Otto 8286 Hidden Bay Court Lake Elmo, Minnesota Site Data Legal Description: That part of Tract A lying Southerly and Westerly of a line described as beginning at the point of intersection of the Southeasterly line of Tract A and the most Westerly corner of Tract C; thence Northwesterly along the extension of the Southwesterly line of Tract C, a distance of 2.92 feet; thence North parallel with the East line of Tract A and its extension a distance of 63.29 feet; thence Northwesterly, deflecting to the left 46 degrees 30 minutes, a distance of 50 feet; thence Northwesterly, deflecting to the left 4 degrees, to the Westerly line of Tract A; all in Registered Land Survey no. 46. Parcel Identification #: 09.029.21.23.0013 Parcel Size (acres): 0.6 acres Parcel Size (square feet): 25,910sfAbove OHWM Existing Use: Single family residence Zoning: RS - Rural Single Family and Shoreland Managent Overlay District Lake Elmo City Code LEC 105.12.1260 (c)(3) Table 17-3 (for structure setbacks)provisions for which LEC 105.12.1260 (c)(3) Table 17-3 (for septic setbacks)variance is sought: LEC 105.12.1260 (c)(3) Table 17-3 (for lot coverage) Required Structure Side Yard: 10’Setbacks Rear Yard: 30’ OHWM: 100’ Required setbacks to 75’ from OHWMSewage Tank and SoilTreatment and DispersalArea plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com VARIANCE REQUEST SUMMARY We are applying for a total of three variances. The variance numbers are indicated with a red circle and number, which correspond to the variance locations on Figures A and B in the following pages. Variance for a reduced setback from the OHWM to the building structureThe first request is simply a request to rebuild a new home to the extents of the existing home footprint. Because the existing home is non-conforming, rebuilding a new home the same distance from the OHWM requires a variance. In addition, we are requesting for an uncovered deck to encroach further into the existing structure setback and continue across the back face of the home. This deck would extend no further than the existing extents of the existing screen porch, but due to the relationship of the geometry of the existing house to the OHWM, it would decrease the setback from the OHWM to the primary structure, for the deck only. Therefore, we are requesting a reduced structure setback from the OHWM of 36.9’. This allows the north corner of the new home to come as close to the OHWM as the north corner of the existing home. Again, we are respecting the existing footprint as much as possible. As indicated in Figure A, the small, dashed line that overlays the new proposed home shows the extents of the existing home and driveway. In summary:LEC 105.12.1260(c)(3) Table 17-3 requires a setback of 100’ from OHWM to building structure.The setback of the existing home is 47.3’ from OHWM to building structure.We are requesting a setback of 47.3’ to the new home and 36.9’ to the new uncovered deck from OHWM. Variance for a slightly increased impervious surface coverageThe second variance request is to allow an increase of our impervious surface coverage from 18.3% to 21.8% primarily to allow for a hammerhead portion of the driveway design. The design team and owner feel this is necessary in order to provide safe egress access to the road adjoining their property. The existing home already violates the lot coverage maximum of 15%. In summary:LEC 105.12.1260(c)(3) Table 17-3 stipulates maximum impervious surface of 15% lot area.Existing impervious surface is 18.3% of lot area.Proposed impervious surface is 21.8% of lot area. Variance for a reduced setback from the OHWM for the soil treatment area (STA) of the septic system.The third variance request is to permit the new designed septic system (SSTS) to encroach to 38.3’ from the OHWM. The existing septic system is not compliant and must be updated to meet current standards for site and soil conditions. The existing septic system already substantially violates the minimum setback requirements from the OHWM and sits in roughly the same location as the proposed new system. Minimum setbacks to primary structure are not met either, mandating the septic system to be reorientated. In summary:LEC 105.12.1260(c)(3) Table 17-3 requires a setback of 75’ from OHWM to STA.The existing setback is 51.3’ from OHWM to STA.We are requesting a setback of 38.3’ from OHWM to STA. 11 XX 22 33 Shed SHED30'FRONTSETBACK10'SIDE SETBACK10'SIDE SETBACK47.33' EXISTING SETBACK TO STRUCTURE36.9' PROPOSED SETBACK TO STRUCTURER 50' DASHED RED LINE INDICATES EXISTING HOUSE DASHED RED LINE INDICATES EXISTING DRIVEWAY PROPOSED HOUSE EXISTING GRADE PROPOSED ROOF ABOVE SEE PROPOSED CERTIFICATE OF SURVEY FOR GRADING PROPOSED WELLHEAD LOCATION OHWM 929.3' PROPOSED SEPTIC SYSTEMPROPOSED SEPTIC SYSTEM EXISING STRUCTURE SETBACK LOWER LEVEL WALKOUT PATIO BELOW REQUESTED STRUCTURE SETBACK 938' 938' 940' 936' 940' 936' 934' 932' 930' 932' 934' SCREENED PORCH 100 YEAR FLOOD ELEVATION = 931' 944' 942' 940' 934' 938' 941.5 936' 934' 940' 934' PROPOSED GARAGE COVERED ENTRY TERRACE OHWM 929.3' PROPOSED ELEVATIONS: T/ MAIN LEVEL SUBFLOOR = 944' = 100'-0" T/ FOUNDATION, TYPICAL = 943'-6 3/4" = 99'-6 3/4" T/ GARAGE SLAB = 941' = 97'-0" T/ LOWER LEVEL SLAB = 933'-0 3/4" = 89'-0 3/4" PROPOSED DECK AT MAIN LEVEL ELEV.NSCALE: 1" = 20' plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com Figure A | Proposed Architectural Site Plan11 22 Shed SHED30'FRONT SETBACK10'SIDESETBACK10' SIDE SETBACK 38.33' PROP O S E D S E P TI C S E T B A C K R 50' PROPOSED WELLHEAD LOCATION OHWM 929.3'OHWM 929.3' PROPOSED BOULDER WALL < 6' HEIGHT 938' 938' 940' 936' 940' 936' 934' 932' 930' 932' 934' 100 YEAR FLOOD ELEVATION = 931' 944' 942' 940' 934' 938' 941.5 936' 934' 940' 934' PROPOSED GARAGE PROPOSED HOUSE 942'NSCALE: 1" = 20' 12% slope 10'-0" 4'-0"Rockbed10' x 45'Absorption Area26' x 45'SB2 SB1 SP1 SB3 933.4' 935.6' 4% slope GROUND - 936.5'TOP OF MOUND - 941.5' Berm cannot extend beyond property line. 28'-3 3/4" w North edge top of Grade of Berm ~ 942.0'1st Tank - Max Bury depth of 3.5 feet - Inlet Invert @ 4.5 feet - 937.5' ~ New Sewer - OutletInvert & Location - TBD 20'-1/4" 10'-0" North edge top of Grade of Berm ~ 942.0'Pump Tank - Max Bury depth of 4.0 feet - Inlet Invert @ 5.0 feet - 937.0' NOTES:1. Minimum Volumes for New Tanks: 1st Tank 1,000-gallons; 2nd Tank 1,000-gallons; PumpTank 1,000-gallons.2. The location for the sewage tanks is only proposed. Discuss options with LicensedInstaller.3. The new tanks must be placed with no more than 4' of cover if possible.4. The existing tanks and mound will be removed and abandoned. The mound will beremoved to an elevation of 936.5' to build the new mound. Scratch the entire soil absorptionarea.5. Carefully remove trees in the soil treatment area.6. A retaining wall may be necessary to allow the Eastern edge of the mound to be reducedfrom 941.5' to 933.4' at the edge of the property to the East.7. All berm slopes are calculated using 3:1 slope ratio. Berm slopes cannot extend beyondthe edge of property. Additional can be used to grade the berms if desired.8. According to the survey data available from E.G. Rud, this plan will require a variance of 36'8" to the OHWM of 929.3' along the Lake Shore and Channel. The City of Lake Elmo mustgrant this variance. MOUND GROUNDELEVATIONS:NW - 933.4'NE - 935.6' SW - 936.5' SE - 937.1' LATERALS3 - Laterals @ 43' of 1-1/2" SCH40Spacing - 3' - Drilled Holes - 3/16" Kloeppner Services & Designs, LLC Lic # 4043 Approved by: Jesse Kloeppner Date - 6/7/23 LEGEND: W = WellSB = Soil BoringSP = Soil Pit = Benchmark NORTH MOUND DIMENSIONSRockbed - 10' x 45'Absorption Bed - 26' x 45'Total Mound - 49.0' x 81.2' Upslope Elev. - 936.5'Min: Sand Height - 36" @ 939.5'Top of Rockbed Elev. - 940.5'Height @ Crown Elev. - 941.5' SOIL OBSERVATIONS:SB1 - 936.2'SB2 - 936.0'SB3 - 936.0'SP1 -937.0' - THIS IS ONLY A SITE PLAN- ALL SEPTIC LOCATIONS AND MEASUREMENTS ARE ONLY ESTIMATES- AS-BUILT WILL NEED TO BE PROVIDED BY INSTALLER AFTER CONSTRUCTION TOP OF MOUND - 941.5' TOP OF MOUND - 941.5' GROUND - 936.5'TOP OF MOUND - 941.5' 8286 Hidden Bay Ct N, Lake Elmo plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com Figure B | Proposed New Septic Site Plan and DesignTHIS DRAWING NTS 33 Red dashed line indicates existing mound area plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com VARIANCE REQUEST DETAILED ANALYSIS In order for action by the board of adjustment to approve or deny a variance request, four findings must be made in accordance with LEC 105.12.320(f). Below, we have detailed our response to each of these required findings for each of the variances sought. Variance for a reduced setback from the OHWM to the building structure LEC 105.12.320(f)(1) Practical difficulties. a) A variance to the provision of this chapter may be granted by the board of adjustment upon the application by the owner of the affected property where the strict enforcement of this chapter would cause practical difficulties because of circumstances unique to the individual property under consideration and then only when it is demonstrated that such actions will be in keeping with the spirit and intent of this chapter. b) Definition of practical difficulties. The term “practical difficulties,” as used in connection with the granting of a variance, means that the property owner proposes to use the property in a reasonable manner not permitted by an official control. As graphically communicated in Figure C on the following page, if the currently mandated setbacks are strictly applied to a new home proposal, the resulting buildable area, shown in the diagram as a hatched red area, provides for an unbuildable site. Given that the owner wishes to construct a modestly sized new home on the property, the strict application of the required structure setbacks alone creates the necessary practical difficulty. Furthermore, as discussed in more detail under the variance request for the Sewage Tank & Soil Treatment and Dispersal Area, Figure D shows the only viable location for the required new Sewage Tank & Soil Treatment and Dispersal Area on the property, as determined by the septic designer engaged on the project. This adds another level of practical difficulty on top of the structure setbacks, preventing the reasonable use of the property. While a deck facing the lake is a desirable and reasonable feature in lakeshore properties, the location needed for the new septic system precludes locating a deck on the north side of the home. Therefore, the remaining location for the deck is the location proposed on the site plan. LEC 105.12.320(f)(2) Unique circumstances. The problem for the landowner/applicant which the proposed variance is intended to correct must be due to circumstances that are unique to the property in question and that were not created by the landowner/applicant. Generally, in this locale, the OHWM roughly follows the shoreline to within a few feet. As graphically communicated in Figure C, unique to this parcel is an OHWM elevation that encroaches well over 25’ into the lot. With an east/west lot depth of 175’, this represents a defacto 15% reduction in the lot depth, before any setbacks are applied. The application of the OHWM setback of 100’ to any structure represents a total setback from the water’s edge of approximately 125’, or over 70% of the total lot depth. Add on the required front yard setback of 30’, and the required setbacks consume nearly 89% of the lot depth. Again, the resultant buildable area is shown as a red hatched area in Figure C and Figure D. 11 SHED10'SIDE SETBACK30'FRONTSETBACK10'SIDE SETBACK47.33' EXISTING SETBACK TO STRUCTURE49.33'EXISTING SETBACK TO THREE SEASONS PORCH938' 938' 936' 940' 936' 934' 932' 930' 932' 934' 934' 934' EXISTING HOUSE 940' THREE SEASONS PORCH GARAGE EXISTING DRIVEWAY OHWM 929.3'75' SEPTIC SETBACKFROM CLO SEST OHW M 100' STR U CTURE SETBACKFROM CLO SEST OHW MOHWM 929.3' 20' BUILDABLE AREA EXISTING SEPTIC SYTEM REQUIRED SEPTIC SETBACK TO HOUSE NSCALE: 1" = 20' plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com Figure C | Existing Conditions and Existing Septic SHED10'SIDE SETBACK30'FRONTSETBACK10'SIDE SETBACK47.33' EXISTING SETBACK TO STRUCTURE49.33'EXISTING SETBACK TO THREE SEASONS PORCH20' PROPOSED SEPTIC SYSTEMPROPOSED SEPTIC SYSTEM 938' 938' 936' 940' 936' 934' 932' 930' 932' 934' 934' 934' EXISTING HOUSE 940' THREE SEASONS PORCH GARAGE EXISTING DRIVEWAY REQUIRED SEPTIC SETBACK TO HOUSE OHWM 929.3'75' SEPTIC SETBACKFROM CLO SEST OHW M 100' STR U CTURE SETBACKFROM CLO SEST OHW MOHWM 929.3' BUILDABLE AREA NSCALE: 1" = 20' plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com Figure D | Existing Conditions and New Septic Design Requirements plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com LEC 105.12.320(f)(3) Character of locality. a) The proposed variance will not alter the essential character of the locality in which the property in question is located. b) Definition of locality. For the purposes of this subsection, the term “locality” shall be defined as all that property within 350 feet of the property proposed for the variance; however, in all events, it shall include all parcels abutting the affected parcel, including those immediately across a public street, alley of other public property. Within 350’ of the property, there are multiple properties with distances between the OHWM and the house structure of less than 100’. There are even a few properties that come to within 25’ of the OHWM. Given these immediately adjacent and nearby examples of non-conformity, it is reasonable to assume that our request to reduce the setback from the OHWM will not dictate a new precedent nor adversely impact neighboring properties’ views and access to the lake, therefore the proposed design is consistent with respect to character of locality, LEC 105.12.320(f)(4) Adjacent properties and traffic. The proposed variance will not impair an adequate supply of light and air to property adjacent to the property in question or substantially increase the congestion of the public streets or substantially diminish or impair property values within the neighborhood. As noted previously, the desire to expand the footprint on the main level away from the lake permits the design to remain a one level structure from the street side, instead of a more imposing two-story structure. The resulting structure therefore protects the viewsheds and access to light and air of the surrounding properties. Finally, a new home will substantially increase the property values of the neighborhood instead of remaining as an older non-conforming home with a non-compliant septic system. The home will remain a single-family residence, and therefore, no new anticipated traffic or congestion is projected beyond the existing conditions. Variance for a slightly increased impervious surface coverage LEC 105.12.320(f)(1) Practical difficulties. a) A variance to the provision of this chapter may be granted by the board of adjustment upon the application by the owner of the affected property where the strict enforcement of this chapter would cause practical difficulties because of circumstances unique to the individual property under consideration and then only when it is demonstrated that such actions will be in keeping with the spirit and intent of this chapter. b) Definition of practical difficulties. The term “practical difficulties,” as used in connection with the granting of a variance, means that the property owner proposes to use the property in a reasonable manner not permitted by an official control. 22 plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com The current home exists on a lot that is 27,591 square feet in size. Roughly 1,700 sf of that is unusable due to the location of the OHWM encroaching into the lot, resulting in a lot that contains 25,910 sf of area above the OHWM. Per LEC 105.12.1260 (c)(3) Table 17-3 the minimum lot size for new unsewered riparian lots is 40,000 square feet. Under the same zoning ordinance, the maximum impervious surface for a new build with a 40,000 minimum lot size is 6,000 sf (15% of lot area). This typically allows for the reasonable use of the property, permitting modestly sized homes with the expected garages, driveways, patios, decks, etc. that one would normally expect to be able to build on a lake lot. At a lot size of 25,910 square feet, our lot is 35% smaller than the minimum lot size required for a new unsewered riparian lot on the lake. Imposing the same 15% impervious surface limit on a parcel that is already 35% smaller than required creates a practical difficulty to use the property in a reasonable manner. LEC 105.12.320(f)(2) Unique circumstances. The problem for the landowner/applicant which the proposed variance is intended to correct must be due to circumstances that are unique to the property in question and that were not created by the landowner/applicant. Due to the required location of the septic design and the desire to age-in-place on the property with a main level garage, the site topography dictates the garage be placed where shown on the new site plan. A hammerhead in the driveway access is needed to allow for safe forward-facing egress from the driveway to the public road. Likewise, the driveway needed to be lengthened in order to provide a safe slope of approach into the garage from the edge of the property line and adjacent property. Again, under the current zoning ordinances, the minimum property size is 40,000 sf. The 15% impervious surface limit would then allow 6,000 sf of impervious surface. This would normally permit these types of site improvements to occur without a variance needed. However, given that this lot is 35% smaller than the minimum lot size required by the ordinance, this property imposes unique constraints upon the project. LEC 105.12.320(f)(3) Character of locality. a) The proposed variance will not alter the essential character of the locality in which the property in question is located. b) Definition of locality. For the purposes of this subsection, the term “locality” shall be defined as all that property within 350 feet of the property proposed for the variance; however, in all events, it shall include all parcels abutting the affected parcel, including those immediately across a public street, alley of other public property. The lot under consideration is 30% smaller than average size of the closest 18 adjacent lots on Hidden Bay Trail North, most of which have impervious surface coverage well in excess of the required 15% limit - some egregiously so. Most properties on Hill Trail North (just across the channel) are also well in excess of the 15% limit. In a desire to limit the height of the home and respect neighboring views and avoid a three-story home from the lakeside, a second level was omitted, necessitating the need for additional main level impervious surface. While we acknowledge that the new site plan does exceed the allowable impervious surface coverage percentage, we argue that the resulting structure is far more respectful of the neighboring properties’ views and the visual impact on the lake than a three level home. Therefore, we argue that the essential character of the locality is maintained, if not improved. LEC 105.12.320(f)(4) Adjacent properties and traffic. The proposed variance will not impair an adequate supply of light and air to property adjacent to the property in question or substantially increase the congestion of the public streets or substantially diminish or impair property plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com values within the neighborhood. Again, while we acknowledge that the new site plan does exceed the allowable impervious surface coverage percentage, we argue that the resulting structure is far more respectful of the neighboring properties’ views and the visual impact on the lake than a three level home. Therefore, we argue that the essential character of the locality is maintained, if not improved. We are replacing a single-family residence with a new single-family residence. There is no expected increase in congestion to the public streets. Variance for a reduced setback from the OHWM to the Sewage Tank & Soil Treatment and Dispersal Area LEC 105.12.320(f)(1) Practical difficulties. a) A variance to the provision of this chapter may be granted by the board of adjustment upon the application by the owner of the affected property where the strict enforcement of this chapter would cause practical difficulties because of circumstances unique to the individual property under consideration and then only when it is demonstrated that such actions will be in keeping with the spirit and intent of this chapter. b) Definition of practical difficulties. The term “practical difficulties,” as used in connection with the granting of a variance, means that the property owner proposes to use the property in a reasonable manner not permitted by an official control. The only location for a new soil treatment area (STA) for a 3-bedroom house on this lot is in the location designed by Kloeppner Services & Design, LLC. The setback from the well, the house, the property boundaries, the Ordinary High-Water Level along Lake Olson and connecting waterway, and disturbed areas create a practical difficulty for the proposed STA and no reasonable alternate soil treatment area can be built for this lot. The proposed location is generally shown in Figure D and more precisely articulated in Figure B. LEC 105.12.320(f)(2) Unique circumstances. The problem for the landowner/applicant which the proposed variance is intended to correct must be due to circumstances that are unique to the property in question and that were not created by the landowner/applicant. The setback from the well, the house, the property boundaries, the Ordinary High-Water Level along Olson Lake and connecting waterway, and disturbed areas create a unique circumstance for the proposed STA and no reasonable alternate soil treatment area can be built for this lot. LEC 105.12.320(f)(3) Character of locality. a) The proposed variance will not alter the essential character of the locality in which the property in question is located. b) Definition of locality. For the purposes of this subsection, the term “locality” shall be defined as all that property within 350 feet of the property proposed for the variance; however, in all events, it shall include all parcels abutting the affected parcel, including those immediately across a public street, alley of other public property. Provided that the new sewage tank & soil treatment and dispersal area is substantially in the same location as the existing non-compliant system, there are no impacts to character of locality. LEC 105.12.320(f)(4) Adjacent properties and traffic. The proposed variance will not impair an adequate supply of light and air to property adjacent to the property in question or substantially increase the congestion of the public streets or substantially diminish or impair property values within the neighborhood. Provided that the new sewage tank & soil treatment and dispersal area is substantially in the same location as the existing non-compliant system, no new impacts to adjacent properties and traffic are expected. 33 plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com EXISTING PHOTOS AND PROPOSED RENDERINGS plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com Figure E | Existing and Proposed View From Entry Drive Existing view to the northwest from entry drive Proposed view to the northwest from entry drive plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com Figure F | Existing and Proposed View From Rear YardExisting view to the southeast from rear yard Proposed view to the southeast from rear yard plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com Figure G | Existing and Proposed View From Septic FieldExisting view to the southwest from septic field Proposed view to the southwest from septic field this version is NTS to scale to fit to 11x17. plaadPLAAD, LLC | 1229 Tyler Street NE, Suite 202, Minneapolis, MN 55413 | www.plaadoffice.com Figure H | Proposed Certificate of Survey 6/7/2023 SSTS Design 8286 Hidden Bay Court North Lake Elmo, MN 55042 PID # 09.029.21.23.0013 Version 1.2 Kloeppner Services & Designs, LLC MPCA LICENSE # 4043 763.843.4114 CONNECT@KSD-MN.COM Prepared by KSD @ 2023 www.ksd-mn.com SSTS Design Summary Report 6/7/23 On May 23rd, 2023, a site evaluation was conducted at 8286 Hidden Bay Court North, Lake Elmo, MN 55042 to identify a location for a replacement Subsurface Sewage Treatment System (SSTS) for a new 3- bedroom home. The PID number is 09.029.21.23.0013. Prior to submitting for permit from Washington County, please review and sign all pages which require a signature. Wastewater Sources & Peak Flow Rate The expected waste strength is Residential Wastewater with a Peak flow of 450 gallons per day (GPD) for a 3-bedroom house. The Actual Daily Flow should be less than 70% of the Peak Flow (315 GPD). Type III - Mound The dispersal area will be a Type III Mound. The Mound Soil Absorption Area required 1,117-sqft (26’ x 45’). The site was evaluated for a Type I system with or without the need for a variance. Due to the location of the house, a new well, and existing soil, no suitable area is available for a Type I system with soil with > 12” to a limiting condition or slope < 12%. The minimum required materials for the sewer line, distribution network, pumps, supply line, sand, rock, fill and cover are detailed in the design worksheets included with this design. Actual values may change slightly and will need to be field verified for correctness. Design Notes 1.Minimum Volumes for New Tanks: 1st Tank 1,000-gallons; 2nd Tank 1,000-gallons; Pump Tank 1,000- gallons. 2.The location for the sewage tanks is only proposed. Discuss options with Licensed Installer. 3.The new tanks must be placed with no more than 4' of cover if possible. 4.The existing tanks and mound will be removed and abandoned. The mound will be removed to an elevation of 936.5' to build the new mound. Scratch the entire soil absorption area. 5.Carefully remove trees in the soil treatment area. 6.A retaining wall may be necessary to allow the Eastern edge of the mound to be reduced from 941.5' to 933.4' at the edge of the property to the East. 7.All berm slopes are calculated using 3:1 slope ratio. Berm slopes cannot extend beyond the edge of property. Additional can be used to grade the berms if desired. 8.According to the survey data available from E.G. Rud, this plan will require a variance of 36' 8" to the OHWM of 929.3' along the Lake Shore and Channel. The City of Lake Elmo must grant this variance. Construction Notes Building Permit requirements No construction shall be allowed by any local unit of government until the permit required for the subsurface sewage treatment system has been issued. Site Protection Prior to and during construction or lot improvements, the proposed initial and replacement soil treatment and dispersal areas shall be protected from disturbance, compaction, or other damage by use of stakes and silt fence or snow fence. MR 7080.2100, Subpart 1. F Electrical installations must comply with applicable laws and ordinances including the most current codes, rules, and regulations of public authorities having jurisdiction and with part 1315.0200, which incorporates the National Electrical Code. As-Built Drawing The Licensed Installer must provide an As-Built of the final location of all components. The attached Site Plan is only for reference and should not be considered as final survey or location of system components. Protection from Freezing for Supply Line Prepared by KSD @ 2023 www.ksd-mn.com The Mound supply line must drain back and empty pipe after each dose. To avoid potential freezing, additional depth or insulation may be necessary to keep line from freezing if buried too shallow. Soil Erosion & Protection from Freezing The dispersal area must have seed and grass established throughout the excavated areas to maintain proper protection from soil erosion and freezing. ShedShedSHED30'FRONTSETBACK10' SIDE SETBACK 10'SIDE SETBACK38.33'PROPOSED SEPTIC SETBACKR 50'PROPOSED WELLHEADLOCATIONOHWM 929.3'OHWM 929.3'PROPOSED BOULDER WALL< 6' HEIGHT938'938'940'936'940'936'934'932'930'932'934'100 YEAR FLOODELEVATION = 931'944'942'940'934'938'941.5936'934'940'934'PROPOSEDGARAGEPROPOSEDHOUSE30'3030FRONTTSETBACKK942'NSCALE: 1" = 20'12% slope10'-0"4'-0"Rockbed 10' x 45' Absorption Area 26' x 45'SB2SB1SP1SB3933.4'935.6'4% slopeGROUND - 936.5'TOP OF MOUND - 941.5'Berm cannot extend beyond property line.28'-3 3/4"wNorth edge top of Grade of Berm ~ 942.0'1st Tank - Max Bury depth of 3.5 feet - Inlet Invert @ 4.5 feet - 937.5'~ New Sewer - OutletInvert & Location - TBD20'-1/4"10'-0"North edge top of Grade of Berm ~ 942.0'Pump Tank - Max Bury depth of 4.0 feet - Inlet Invert @ 5.0 feet - 937.0'NOTES:1. Minimum Volumes for New Tanks: 1st Tank 1,000-gallons; 2nd Tank 1,000-gallons; PumpTank 1,000-gallons.2. The location for the sewage tanks is only proposed. Discuss options with LicensedInstaller.3. The new tanks must be placed with no more than 4' of cover if possible.4. The existing tanks and mound will be removed and abandoned. The mound will beremoved to an elevation of 936.5' to build the new mound. Scratch the entire soil absorptionarea.5. Carefully remove trees in the soil treatment area.6. A retaining wall may be necessary to allow the Eastern edge of the mound to be reducedfrom 941.5' to 933.4' at the edge of the property to the East.7. All berm slopes are calculated using 3:1 slope ratio. Berm slopes cannot extend beyondthe edge of property. Additional can be used to grade the berms if desired.8. According to the survey data available from E.G. Rud, this plan will require a variance of 36'8" to the OHWM of 929.3' along the Lake Shore and Channel. The City of Lake Elmo mustgrant this variance.MOUND GROUNDELEVATIONS:NW - 933.4'NE - 935.6' SW - 936.5' SE - 937.1'LATERALS3 - Laterals @ 43' of 1-1/2" SCH40Spacing - 3' - Drilled Holes - 3/16"Kloeppner Services & Designs, LLCLic # 4043Approved by: Jesse KloeppnerDate - 6/7/23LEGEND:W = WellSB = Soil BoringSP = Soil Pit = BenchmarkNORTHMOUND DIMENSIONSRockbed - 10' x 45'Absorption Bed - 26' x 45'Total Mound - 49.0' x 81.2'Upslope Elev. - 936.5'Min: Sand Height - 36" @ 939.5'Top of Rockbed Elev. - 940.5'Height @ Crown Elev. - 941.5'SOIL OBSERVATIONS:SB1 - 936.2'SB2 - 936.0'SB3 - 936.0'SP1-937.0'- THIS IS ONLY A SITE PLAN- ALL SEPTIC LOCATIONS AND MEASUREMENTS ARE ONLY ESTIMATES- AS-BUILT WILL NEED TO BE PROVIDED BY INSTALLER AFTER CONSTRUCTIONTOP OF MOUND - 941.5'TOP OF MOUND - 941.5'GROUND - 936.5'TOP OF MOUND - 941.5' NEW MOUND - 26' X 45' TANKS NEW MOUND - 26' X 45' TANKS SOUTHEAST CORNER OF STA SOUTHEAST CORNER OF STA SOUTHWEST CORNER OF STA NORTHWEST CORNER OF STA NORTHEAST CORNER OF STA Preliminary Evaluation Worksheet 1. Contact Information v 03.15.2023 Property Owner/Client: Site Address: Legal Description: Parcel ID: SEC: TWP: RNG: A. Client-Provided Information Project Type: Project Use: Residential use:# Bedrooms: Dwelling sq.ft.: Unfinished sq.ft.: # Adults: # Children: # Teenagers: In-home business (Y/N): If yes, describe: * Clear water source - should not go into system Additional current or future uses: Anticipated non-domestic waste: The above is complete & accurate: B. Designer-determined Flow and Anticipated Waste Strength Information Attach additional information as necessary. Design Flow:GPD Anticipated Waste Type: Maximum Concentration BOD:mg/L TSS mg/L Oil & Grease mg/L 3. Preliminary Site Information A. Water Supply Wells 1 2 3 4 #DescriptionMn. ID# Well Depth (ft.) Casing Depth (ft.) 8286 Hidden Bay Ct N ?? >50 Additional Well Information: 8286 Hidden Bay Ct N, Lake Elmo, MN 55402 LOT A SUBDIVISIONCD 37672 SUBDIVISIONNAME RLS #46 THAT PART OF TRACT A LYING SOUTHERLY AND WESTERLY OF A LINE DESCRIBED AS BEGINNING AT THE POINT OF INTERSECTION OF THE SOUTHEASTERLY LINE OF TRACT A AND THE MOST WESTERLY CORNER OF TRACT C; THENCE NORTHWESTERLY ALONG THE EXTENSION OF THE SOUTHWESTERLY LINE OF TRACT C, A DISTANCE OF 2.92 FEET; THENCE NORTH PARALLEL WITH THE EAST LINE OF TRACT A AND ITS EXTENSION A DISTANCE OF 63.29 FEET; THENCE NORTHWESTERLY, DEFLECTING TO THE LEFT 46 DEGREES 30 MINUTES, A DISTANCE OF 50 FEET; THENCE NORTHWESTERLY, DEFLECTING TO THE LEFT 4 DEGREES, TO THE WESTERLY LINE OF TRACT A; ALL IN REGISTERED LAND SURVEY NO. 46. Otto Date Completed: No Water-using devices: (check all that apply) 4/25/2023 2. Flow and General System Information 09.029.21.23.0013 3 Project ID: 29 2109 Client signature & date 450 2560170 Confining Layer STA Setback 50 Source New Well Residential All SSTS components must be >50' from non-sensitive wells. >50 New Construction Replacement Residential Other Establishment: Garbage Disposal/Grinder Large Bathtub >40 gallons Self-Cleaning Humidifier* Water Softener*Sump Pump* High Eff. Furnace* Hot Tub* Iron Filter* Repair Clothes Washing Machine Sewage pump in basement Other: Dishwasher Expansion Preliminary Evaluation Worksheet Site within 200' of noncommunity transient well (Y/N)Yes, source: Site within a drinking water supply management area (Y/N)Yes, source: Site in Well Head Protection inner wellhead management zone (Y/N)Yes, source: Buried water supply pipes within 50 ft of proposed system (Y/N) B. Site located in a shoreland district/area?Yes, name: Elevation of ordinary high water level:ft Source: Classification:Tank Setback:ft. C. Site located in a floodplain?Yes, Type(s): Floodplain designation/elevation (10 Year):ft Source: Floodplain designation/elevation (100 Year):ft Source: D. Property Line Id / Source: E. ID distance of relevant setbacks on map: Map Units:Slope Range:% List landforms: Landform position(s): Parent materials: Depth to Bedrock/Restrictive Feature:in Depth to Watertable:in Septic Tank Absorption Field- At-grade: Septic Tank Absorption Field- Mound: Septic Tank Absorption Field- Trench: Name of LGU: LGU Contact: LGU-specific setbacks: LGU-specific design requirements: LGU-specific installation requirements: Notes: 5. Local Government Unit Information 75' from Recreational Lake Sewage Tanks: 3-bedroom = 1,000-gal & 1,000-gal >80 Shorelines Plain Lacustrine Not rated Not rated Map Unit Ratings Washington County Public Health & Environment - 651-430-6655 >80 Not rated N/A N/A No No No No Lake- Recreational 4. Preliminary Soil Profile Information From Web Soil Survey (attach map & description) 7575 No N/A N/A N/A 1033; Udifluvents Yes Lake Olson 929 County GIS ft. STA Setback: Survey Plat Map Property Lines Other:OHWL EasementsWater Well(s) Building(s) Owner County GIS Other: Date Completed: Elevations in feet Benchmark: ft BM Location - System Corners: Soil Observation:Bury Depth NW:ft SB1:ft Existing Tanks - Inlet Invert 932.8 ft ft NE:ft SB2:ft New Tanks SW:ft SB3:ft 1st Tank - Ground ft SE:ft SP1:ft ft ft 2nd Tank - Ground ft Rockbed -ft ft ft Rockbed -ft Pump Tank - Ground ft - Inlet Invert ft ft Pump Intake ft Mapping Checklist Locate Easements Setbacks Elevations Comments: Property Address:8286 Hidden Bay Ct N, Lake Elmo, MN 55402 933.4 936.2 935.8 Top of Existing Pump Tank Manhole Cover Proposed Design Map Project ID: 6/1/2023 935.6 936.0 936.5 936.0 937.1 936.0 - Inlet Invert - Inlet Invert Elevation Difference: Pump Intake (BURY DEPTH OF 4 FEET FROM 942.0') 933.5' to 940.0' = 6.5' Benchmark Borings Perc Tests Horizontal and Vertical Reference Points Other: Building All water wells within 100 feet Pressure Pipe Water Suction Streams, Lakes Floodway and Fringe Other: Other: Phone Electric Gas Other: Other: Lot Dimensions/Property Lines Dwellings and Other Improvements Existing or Proposed System(s) Replacement Area Unsuitable Area(s) Public Water Supply Wells Pumping Access Inner Wellhead Zone Other: Other: Field Evaluation Worksheet 1. Project Information Site Address: Utility Locations Identified Locate and Verify (see Site Evaluation map ) Landscape position: Percent slope: % Slope shape: Slope direction: Describe the flooding or run-on potential of site: Describe the need for Type III or Type IV system: Note: Proposed soil treatment area protected? (Y/N): If yes, describe: If yes, describe: Soil observations were conducted in the proposed system location (Y/N): A soil observation in the most limiting area of the proposed system (Y/N): Number of soil observations: Soil observation logs attached (Y/N): Percolation tests performed & attached (Y/N): in ft *Most Restrictive Depth Identified from List Below Periodically saturated soil:in ft Soil Texture: Standing water:in ft Percolation Rate:min/inch Bedrock:in ft Soil Hyd Loading Rate:gpd/sq.ft Benchmark Elevation:ft Elevations and Benchmark on map? (Y/N): Benchmark Elevation Location: Differences between soil survey and field evaluation: Site evaluation issues / comments: Anticipated construction issues: v 03.15.2023 Yes Yes northwest Yes Date Completed: 6/1/20238286 Hidden Bay Ct N, Lake Elmo, MN 55402 Property Owner/Client:Otto The mound will be placed in footprint of existing system. Clay Loam Yes 4 No Yes 5. Phase I. Reporting Information Elevation 936.5 Depth 0 Limiting Condition*: Project ID: Vegetation type(s):Lawn Back/ Side Slope Convex, Convex 2. Utility and Structure Information 3. Site Information 12 The new tanks must be placed with no more than 4' of cover if possible. Stakes The new system will be built after removing existing mound to grade 936.5' Filled, Compacted, Disturbed areas (Y/N): The soil treatment area will be located in place of existing mounds after removed. 4. General Soils Information Clay Loam was observed at within 12" of surface at SB1 Top of Existing Pump Tank Manhole Cover 0.45 935.8 Yes 0 936.5 Gopher State One Call #Any Private Utilities: Existing Buildings Improvements Easements Setbacks Project ID:Client:Soil parent material(s): (Check all that apply)Slope %: 12.0 Slope shape: NoVegetation:936.2935.2Shape Grade10YR 3/2 NoneNone None10YR 3/4 NoneNone None7.5YR 4/3 NoneNone None7.5YR 4/4 10YR 5/2 Depletions S25YR 4/6 Concentrations S15YR 4/4 10YR 6/2 Depletions S25YR 5/6 Concentrations S1I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws.L4043(License #)(Cert #)Flooding/Run-On potential:SunnySurface Elevation-Relative to benchmark:1033; UdifluventsConvex, ConvexSoil Observation Log v 03.15.2023OttoLocation / Address: 8286 Hidden Bay Ct N, Lake Elmo, MN 55402LawnSoil survey map units:Limiting Layer Elevation:ShoulderLandscape Position:Date/Time of Day/Weather Conditions: 5/23/20231:20 PMObservation #/Location:SB1Southwest end of Mound Upslope Observation Type:AugerIndicator(s)I-------- Structure-----------IConsistence0-6Fine Sandy Loam5Granular WeakFriableDepth (in) TextureRock Frag. %Matrix Color(s) Mottle Color(s) Redox Kind(s)6-10 Silt Loam 5Granular Moderate Friable13-20 Clay Loam 10Blocky Strong Extremely Firm10-13 Clay Loam 10Blocky Strong Firm20-30 Clay Loam 5Blocky Strong Extremely Firm(LGU/Designer/Inspector) (Signature)(Date)Comments: Limiting Layer - 13" soil creditJesse Kloeppner5/23/2023(Designer/Inspector)(Signature)(Date)Optional Verification: I hereby certify that this soil observation was verified according to Minn. R. 7082.0500 subp. 3 A. The signature below represents an infield verification of the periodically saturated soil or bedrock at the proposed soil treatment and dispersal site.OutwashLacustrineLoessTillAlluviumBedrockOrganic MatterDisturbed/Fill Project ID:Client:Soil parent material(s): (Check all that apply)Slope %: 12.0 Slope shape: NoVegetation:936.0936.0Shape Grade10YR 3/2 NoneNone None10YR 3/4 NoneNone None7.5YR 4/4 10YR 5/2 Depletions S27.5YR 4/6 10YR 6/2 Depletions S27.5YR 4/6 Concentrations S15YR 4/4 10YR 6/2 Depletions S25YR 5/6 Concentrations S1I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws.L4043(License #)(Cert #)Optional Verification: I hereby certify that this soil observation was verified according to Minn. R. 7082.0500 subp. 3 A. The signature below represents an infield verification of the periodically saturated soil or bedrock at the proposed soil treatment and dispersal site.(LGU/Designer/Inspector)(Signature)(Date)(Designer/Inspector)(Signature)(Date)Comments: Limiting Layer - 0" soil credit.Jesse Kloeppner20-30 Clay Loam 0Blocky StrongExtremely Firm13-20 Clay Loam 0Blocky StrongExtremely Firm10-13 Clay Loam 5Blocky StrongFirm6-10 Silt Loam 0Blocky ModerateFriableIndicator(s)I-------- Structure-----------IConsistence0-6Fine Sandy Loam0Granular WeakFriableDepth (in) TextureRock Frag. %Matrix Color(s) Mottle Color(s) Redox Kind(s)Date/Time of Day/Weather Conditions: 5/23/2023 1:50 PM Sunny Limiting Layer Elevation:Observation #/Location:SB2Northwest end of Mound STAObservation Type:AugerLandscape Position: ShoulderConvex, Convex Flooding/Run-On potential:LawnSoil survey map units: 1033; Udifluvents Surface Elevation-Relative to benchmark:Soil Observation Log v 03.15.2023OttoLocation / Address: 8286 Hidden Bay Ct N, Lake Elmo, MN 55402OutwashLacustrineLoessTillAlluviumBedrockOrganic MatterDisturbed/Fill Project ID:Client:Soil parent material(s): (Check all that apply)Slope %: 4.0 Slope shape: NoVegetation:936.0936.0Shape Grade10YR 3/2 NoneNone None10YR 3/4 NoneNone None10YR 4/3 NoneNone None10YR 5/3 NoneNone None10YR 3/3 10YR 4/6 Concentrations S110YR 3/2 10YR 5/2 Depletions S2I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws.L4043(License #)(Cert #)Optional Verification: I hereby certify that this soil observation was verified according to Minn. R. 7082.0500 subp. 3 A. The signature below represents an infield verification of the periodically saturated soil or bedrock at the proposed soil treatment and dispersal site.(LGU/Designer/Inspector)(Signature)(Date)(Designer/Inspector)(Signature)(Date)Comments: Limiting Layer - 0" soil credit.Jesse Kloeppner5/23/202330-46Fine Sandy Loam0Granular WeakFriable20-30 Medium Sand 0Single grain StructurelessLoose10-20 Medium Sand 0Single grain StructurelessLoose6-10 Loam 0Granular WeakFriableIndicator(s)I-------- Structure-----------IConsistence0-6 Loam 5Granular WeakFriableDepth (in) TextureRock Frag. %Matrix Color(s) Mottle Color(s) Redox Kind(s)Date/Time of Day/Weather Conditions: 5/23/2023 2:05 PM Sunny Limiting Layer Elevation:Observation #/Location:SB3Northeast end of Mound STAObservation Type:AugerLandscape Position: ShoulderConvex, Convex Flooding/Run-On potential:LawnSoil survey map units: 1033; Udifluvents Surface Elevation-Relative to benchmark:Soil Observation Log v 03.15.2023OttoLocation / Address: 8286 Hidden Bay Ct N, Lake Elmo, MN 55402OutwashLacustrineLoessTillAlluviumBedrockOrganic MatterDisturbed/Fill Project ID:Client:Soil parent material(s): (Check all that apply)Slope %: 4.0 Slope shape: NoVegetation:937.0937.0Shape Grade10YR 3/2 NoneNone None10YR 3/4 NoneNone None10YR 4/3 NoneNone None10YR 5/3 NoneNone None10YR 4/2 10YR 6/2 Depletions S210YR 3/2 10YR 5/6 Concentrations S1I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws.L4043(License #)(Cert #)Optional Verification: I hereby certify that this soil observation was verified according to Minn. R. 7082.0500 subp. 3 A. The signature below represents an infield verification of the periodically saturated soil or bedrock at the proposed soil treatment and dispersal site.(LGU/Designer/Inspector)(Signature)(Date)(Designer/Inspector)(Signature)(Date)Comments: Limiting Layer - 0" soil credit - The boring is the side of the Existing Mound. Remove soil to 936.5' to build new mound. Cut soil to 936.5'.Jesse Kloeppner5/23/202333-45Loamy Fine Sand5Granular WeakFriable19-33 Medium Sand 10Single grain StructurelessLoose12-19 Coarse Sand >50Single grain StructurelessLoose6-12 Loam 5Granular WeakFriableIndicator(s)I-------- Structure-----------IConsistence0-6Fine Sandy Loam5Granular WeakFriableDepth (in) TextureRock Frag. %Matrix Color(s) Mottle Color(s) Redox Kind(s)Date/Time of Day/Weather Conditions: 5/23/2023 1:35 PM Sunny Limiting Layer Elevation:Observation #/Location:SP1Southeast Corner of Mound Upslope Observation Type:PitLandscape Position: ShoulderConvex, Convex Flooding/Run-On potential:LawnSoil survey map units: 1033; Udifluvents Surface Elevation-Relative to benchmark:Soil Observation Log v 03.15.2023OttoLocation / Address: 8286 Hidden Bay Ct N, Lake Elmo, MN 55402OutwashLacustrineLoessTillAlluviumBedrockOrganic MatterDisturbed/Fill Textures:CClayCoSiC Silty ClayMSC Sandy ClayFCL Clay LoamVFSiCL Silty Clay LoamSCL Sandy Clay LoamSi SiltSiL Silt LoamLLoamS1. Depleted matrix (value >/=4 and chroma </=2)SL Sandy Loam*S2. Distinct gray or red redox features (any Matrix Hue)LS Loamy Sand*S3. Matrix Hue of 5Y with a chroma </= 3SSand*S4. Matrix Hue of 7.5 YR or redder with faint redox concentrations or redox depletionsShape:Grade:Poorly formed, indistinct peds, barely observable in placeNo observable aggregates, or no orderly arrangement of natural lines of weaknessConsistence:RigidFoot pressureStrongDurable peds that are quite evident in un-displaced soil, adhere weakly to one another, withstand displacement, and become separated when soil is disturbedMassiveLooseIntact specimen not availableFirmModerate force between fingersFriableSlight force between fingersExtremely FirmModerate force between hands or slight foot pressureSingle GrainThe structure found in a sandy soil. The individual particles are not held together.PrismaticFlat or slightly rounded vertical faces bound the individual peds. Peds are distinctly longer vertically, and faces are typically casts or molds of adjoining peds. Prismatic structure is commonly found in the lower subsoil.WeakModerateWell formed, distinct peds, moderately durable and evident, but not distinct in undisturbed soilLooseNo peds, sandy soilGranularThe peds are approximately spherical or polyhedral and are commonly found in topsoil. These are the small, rounded peds that hang onto roots when soil is turned over.BlockyThe peds are block-like or polyhedral, and are bounded by flat or slightly rounded surface that are castings of the faces of surrounding peds. Blocky structure is commonly found in the lower topsoil and subsoil.PlatyThe peds are flat and plate like. They are oriented horizontally and are usually overlapping. Platy structure is commonly found in forested areas just below the leaf litter or shallow topsoil.*Sand Modifiers: Topsoil Indicator(s) of Saturation:Coarse T1. Wetland VegetationMedium T2. Depressional LandscapeSlope Shape:Slope shape is described in two directions: up and down slope (perpendicular to the contour), and across slope (along the horizontal contour); e.g. Linear, Convex or LV'. Fine T3. Organic texture or organic modifiersVery Fine T4. N 2.5/ 0 colorT5. Redox features in topsoilT6. Hydraulic indicatorsSubsoil Indicator(s) of Saturation: Design Summary Page 1. PROJECT INFORMATION v 03.15.2023 Property Owner/Client: Project ID: Site Address: Date: Email Address: Phone: 2. DESIGN FLOW & WASTE STRENGTH Attach waste strength data/estimated strength for Other Establishments Design Flow:GPD Anticipated Waste Type: BOD:mg/L TSS:mg/L Oil & Grease:mg/L Treatment Level: Select Treatment Level C for residential septic tank effluent 3. HOLDING TANK SIZING Code Minimum Holding Tank Capacity: Gallons with Tanks or Compartments Recommended Holding Tank Capacity: Gallons with Tanks or Compartments Type of High Level Alarm: (Set @ 75% tank capacity) Comments: 4. SEPTIC TANK SIZING A. Residential dwellings: Number of Bedrooms (Residential): Code Minimum Septic Tank Capacity: Gallons with Tanks or Compartments Recommended Septic Tank Capacity:Gallons with Tanks or Compartments Effluent Screen & Alarm (Y/N):Model/Type: B. Other Establishments: Waste received by:Days Hyd. Retention Time Code Minimum Septic Tank Capacity:Gallons with Tanks or Compartments Recommended Septic Tank Capacity:Gallons with Tanks or Compartments Effluent Screen & Alarm (Y/N):Model/Type: 5. PUMP TANK SIZING Pump Tank Capacity (Minimum):Gal Pump Tank Capacity (Minimum):Gal Pump Tank Capacity (Recommended):Gal Pump Tank Capacity (Recommended):Gal Pump Req:GPM Total Head ft Pump Req:GPM Total Head ft Supply Pipe Dia. 2.00 in Dose Vol:gal in Dose Vol:Gal * Flow measurement device must be incorporated for any system with a pump: Elapsed Time Meter and/or Event Counter * 11.7 60 25 C GPD x 1000 2 Yes PolyLok 525 110.0 170 1000 19.0 Supply Pipe Dia. 2000 2 Minimum Capacity: Residential =1000 gal or 400 gal/bedroom, Other Establishment = Design Flow x 5.0, Minimum size 1000 gallons 06/01/238286 Hidden Bay Ct N, Lake Elmo, MN 55402 Otto 3 2000 Soil Treatment Dosing Tank Other Component Dosing Tank: * Other Establishments Require Department of Labor and Industry Approval and Inspection for Building Sewer * 450 Residential Design Summary Page 6. SYSTEM AND DISTRIBUTION TYPE Soil Treatment Type: Distribution Type: Elevation Benchmark: ft Benchmark Location: MPCA System Type: Distribution Media: Type III/IV/V Details: 7. SITE EVALUATION SUMMARY: Describe Limiting Condition: Layers with >35% Rock Fragments? (yes/no) No Note: Depth Elevation of Limiting Condition Limiting Condition: inches 0.0 ft ft Critical for system compliance Minimum Req'd Separation: inches 3.0 ft Code Max System Depth*: inches -3.0 ft ft *This is the maximum depth to the bottom of the distribution media for required separation. Negative Depth (ft) requires a mound. ft Minimum Sand Depth:inches A. Soil Texture:lbs/sq.ft/day 0 C. Soil Hyd. Loading Rate:GPD/ft2 D: Percolation Rate:MPI E. Contour Loading Rate:Note: F. Measured Land Slope:% Note: Comments: 8. Trench: Dispersal Area sq.ft Sidewall Depth in Trench Width ft Total Lineal Feet ft No. of Trenches in Contour Loading Rate ft Minimum Length ft in Bed: Dispersal Area sq.ft Sidewall Depth in Maximum Bed Depth in Bed Width ft Bed Length ft Designed Bed Depth in Mound: Dispersal Area sq.ft Bed Length ft Bed Width ft Absorption Width ft Clean Sand Lift ft Berm Width (0-1%)ft Upslope Berm Width ft Downslope Berm ft Endslope Berm Width ft Total System Length ft System Width ft Contour Loading Rate gal/ft 18.6 Project ID: 36.0 Distribution Elevation >Code Max Depth 12.0 0.45 SOIL TREATMENT AREA DESIGN SUMMARY Rock Mound Designed Trench Depth Code Max. Trench Depth 26.0 29.111.1 Depth 0 936.50 Pressure Distribution-Level Top of Existing Pump Tank Manho If yes, describe below: % rock and layer thickness, amount of soil credit and any additional information for addressing the rock fragments in this design. See Soil Boring Logs Mound will use 36" of sand 935.8 Elevation Redoximorphic Features/Saturated Soils 36 Mound 82.2 10.050.1 3.0 10.0 Clay Loam 939.5Designed Distribution Elevation: B. Organic Loading Rate (optional): Elevation OK 450.0 45.0 Type III 939.50 10 Design Summary Page At-Grade: Dispersal Area sq.ft Bed Length ft Bed Width ft Upslope Berm ft Downslope Berm ft Finished Height ft System Length ft Endslope Berm ft System Width ft Level & Equal Pressure Distribution Soil Treatment Area in Lateral Spacing ft Perforation Spacing ft Perforation Diameter gal gal gal 9. Organic Loading to Soil Treatment A.Starting BOD Concentration = Design Flow X 0.7 X Starting BOD (mg/L) X 8.35 ÷ 1,000,000 lbs. BOD/day (Organic Loading Design) B.Organic Loading to Soil Treatment Area: (enter loading value in 7B) mg/L X sq.ft =lbs./day/sqft A.Starting BOD Concentration = Design Flow X Starting BOD (mg/L) X 8.35 ÷ 1,000,000 =lbs. BOD/day (HSW Technology Design) B.Target BOD Concentration = Design Flow X Target BOD (mg/L) X 8.35 ÷ 1,000,000 = lbs. BOD/day (HSW Technology Design) Lbs. BOD To Be Removed:lbs. BOD/day (HSW Technology Design) Pretreatment Technology:*Must Meet or Exceed Target Disinfection Technology:*Required for Levels A & B 10. Comments/Special Design Considerations: I hereby certify that I have completed this work in accordance with all applicable ordinances, rules and laws. Min Dose Volume Lateral Diameter 57 Project ID: No. of Laterals Total Dosing Volume 3 2in Drainback Volume gal Max Dose Volume 31.50 3 112 3/16 113 (Designer)(Signature) Jesse Kloeppner L4043 06/01/23 gpd X mg/L X 8.35 ÷ 1,000,000 (License #) 1. Minimum Volumes for New Tanks: 1st Tank 1,000-gallons; 2nd Tank 1,000-gallons; Pump Tank 1,000-gallons. 2. The location for the sewage tanks is only proposed. Discuss options with Licensed Installer. 3. The new tanks must be placed with no more than 4' of cover if possible. 4. The existing tanks and mound will be removed and abandoned. The mound will be removed to an elevation of 936.5' to build the new mound. Scratch the entire soil absorption area. 5. Carefully remove trees in the soil treatment area. 6. A retaining wall may be necessary to allow the Eastern edge of the mound to be reduced from 941.5' to 933.4' at the edge of the property to the East. 7. All berm slopes are calculated using 3:1 slope ratio. Berm slopes cannot extend beyond the edge of property. Additional can be used to grade the berms if desired. 8. According to the survey data available from E.G. Rud, this plan will require a variance of 36' 8" to the OHWM of 929.3' along the Lake Shore and Channel. The City of Lake Elmo must grant this variance. (Date) gpd X mg/L X 8.35 ÷ 1,000,000 HSW Technology Strength Reduction gpd X 0.7 X 8.35 ÷ 1,000,000 ÷ Organic Loading and Additional Info for At-Risk, HSW or Type IV Design mg/L X 8.35 ÷ 1,000,000 =gpd X 1. SYSTEM SIZING:v 03.15.2023 A.Design Flow:GPD B.Soil Loading Rate:GPD/sqft C.ft D.Percent Land Slope:% E.Media (Sand) Loading Rate:GPD/sqft F.Mound Absorption Ratio: 2. DISPERSAL MEDIA SIZING A.Hydraulic Absorption Required Bottom Area: Design Flow (1A) ÷ Design Media Loading Rate(1E) GPD/sqft =sq.ft Organic Sizing (OPTIONAL) B.Organic Absorption Bed Area = Organic Loading (Summary 9A) ÷ Organic Soil Loading Rate (Summary 7B) sq.ft C.Required Bed Area = Greater of Hydraulic (1D) or Organic Bed Area (1E) sq.ft D.sq.ft B.Enter Dispersal Bed Width: ft Can not exceed 10 feet C.Calculate Contour Loading Rate: Bed Width(2B) X Design Media Loading Rate(1E) ft X GPD/sqft =gal/ft Can not exceed Table 1 D.Calculate Minimum Dispersal Bed Length: Dispersal Bed Area(2A) ÷ Bed Width(2B) sqft ÷ ft =ft ft 3. ABSORPTION AREA SIZING A.Calculate Absorption Width: Bed Width(2B) X Mound Absorption Ratio(1F) ft X =ft B.For slopes >1%, the Absorption Width is measured downhill from the upslope edge of the Bed. Calculate Downslope Absorption Width: Absorption Width(1F) - Bed Width(2B) ft -ft =ft 2.6 lbs BOD ÷ 450 0.0 1.0 10.0 450 10.0 10 26.010.0 26.0 10.0 Project ID: *Systems with these values are not Type I systems. Contour Loading Rate (linear loading rate) is a recommended value. 1.0 450 450 2.60 1.0 12.0 0.45 Mound Design Worksheet ≥1% Slope Depth to Limiting Condition If a larger dispersal media Length is desired, enter size: GPD ÷ 45.0 10.0 16.0 lbs BOD/sq.ft = 450 Designed Dispersal Media Area: 450 Optional upsizing of area to be larger than 2C 4. DISTRIBUTION MEDIA: Select Dispersal Media:Enter Either 4A or 4B A. in B.Registered Media in Specific Media Comments: 5. MOUND SIZING A.Clean Sand Lift: Required Separation - Depth to Limiting Condition = Clean Sand Lift (1 ft minimum) 3.0 ft -ft =ft Design Sand Lift (optional):ft B.Upslope Height: Clean Sand Lift(6A) + Depth of Media(4AorB) +Depth to Cover Pipe+ Depth of Cover (1 ft) ft +ft +ft +ft =ft C.Select Upslope Berm Multiplier (based on land slope): D.Calculate Upslope Berm Width: Multiplier (5C) X Upslope Mound Height (5B) Xft =ft E.Calculate Drop in Elevation Under Bed: Bed Width(2B) X Land Slope(1D) ÷ 100 = Drop (ft) ft X ft F.Calculate Downslope Mound Height: Upslope Height(5B) + Drop in Elevation(5E) ft +ft =ft G.Select Downslope Berm Multiplier (based on land slope): H.Calculate Downslope Berm Width: Downslope Multiplier(5G) X Downslope Height (5F) xft =ft I.Calculate Minimum Berm to Cover Absorption Area: Downslope Absorption Width(3A) + 4 feet ft +ft =ft J.Design Downslope Berm = greater of 5H and 5I:ft K.Select Endslope Berm Multiplier:(usually 3.0 or 4.0) L.Calculate Endslope Berm Width = Endslope Berm Multiplier(5K) X Downslope Mound Height(5F) X ft =ft M.Calculate Mound Width: Upslope Berm Width(5D) + Bed Width(2B) + Downslope Berm Width(5J) ft +ft +ft =ft N.Calculate Mound Length: Endslope Berm Width (5L) + Bed Length(2D) + Endslope Berm Width(5L) ft +ft +ft =ft 6.2 5.0 2.21 1.0 16.0 1.205.0 6.2 3.0 10.0 12.0 2.21 5.0 11.1 50.129.1 82.2 6.2 18.6 10.0 20.0 29.14.69 18.6 4.69 3.0 45.0 % ÷ 100 = 0.50.50 Rock Depth Below Distribution Pipe 6 1.20 Rock Project ID: Check registered product information for specific application details and design 29.1 18.6 3.00 11.1 3.00 4 Registered Media Depth Project ID: 6. MOUND DIMENSIONS (Feet) 450 Required Separation: (in)ft ft (in)ft ft 1.50 (in)ft Perforation Size: 3/16 (in) 36.0 (in) If Split and Non-Level Pressure Distribution Used: See Non-Level Pressure Distribution Form Comments: Lateral Pipe Diameter: Media Depth: 36 Elevation to Benchmark Elevation required Separation: Elevation Limiting Layer: All berm slopes calculated using 3:1 slope ratio. Perforation Spacing: Distribution Media: Manifold Connection: 6.0 End Project ID: Elevation Top of Media(min): Elevation Top of System(min): 936.5 939.5 939.5 940.5 941.5 Rock Elevation Distribution Media Bottom:Total Mound WidthUpslope Downslope Clean SandClean Sand Endslope EndslopeDispersal Bed: X Total Mound Length Distribution Area 450 sq.ft v 03.15.2023 A.Rock Volume : (Rock Below Pipe + Rock to cover pipe (pipe outside dia + ~2 inch)) X Bed Length X Bed Width = Volume (in + 2.0 ft X ft =cu.ft Divide cu.ft by 27 cu.ft/cu.yd to calculate cubic yards:=cu.yd Add 30% for constructability:=cu.yd B.Calculate Clean Sand Volume: Volume Under Rock bed : Average Sand Depth x Media Width x Media Length = cubic feet ft X ft X ft = cu.ft For a Mound on a slope from 0-1% Volume from Length = ((Upslope Mound Height - 1) X Absorption Width Beyond Bed X Media Bed Length) ft - 1)X Xft= Volume from Width = ((Upslope Mound Height - 1) X Absorption Width Beyond Bed X Media Bed Width) ft - 1)X Xft= Total Clean Sand Volume : Volume from Length + Volume from Width + Volume Under Media cu.ft +cu.ft +cu.ft =cu.ft For a Mound on a slope greater than 1% Upslope Volume : ((Upslope Mound Height - 1 ) x 3 x Bed Length ) ÷ 2 = cubic feet (( ft - 1) X ) ÷ 2 = cu.ft Downslope Volume : ((Downslope Height - 1) x Downslope Absorption Width x Media Length) ÷ 2 = cubic feet (( ft - 1) X ft X ) ÷ 2 = cu.ft Endslope Volume: (Downslope Mound Height - 1) x 3 x Media Width = cubic feet ( ft - 1 ) X ft = cu.ft Total Clean Sand Volume : Upslope Volume + Downslope Volume + Endslope Volume + Volume Under Media cu.ft +cu.ft +cu.ft +cu.ft =cu.ft Divide cu.ft by 27 cu.ft/cu.yd to calculate cubic yards: = cu.yd Add 30% for constructability: = cu.yd C.Calculate Sandy Berm Volume: Total Berm Volume (approx.): ((Avg. Mound Height - 0.5 ft topsoil) x Mound Width x Mound Length) ÷ 2 (-)ft X ft X ) ÷ 2 = cu.ft Total Mound Volume - Clean Sand volume -Rock Volume = cubic feet cu.ft - cu.ft - cu.ft = cu.ft Divide cu.ft by 27 cu.ft/cu.yd to calculate cubic yards: = cu.yd Add 30% for constructability: yd3 x 1.3 = cu.yd D.Calculate Topsoil Material Volume: Total Mound Width X Total Mound Length X .5 ft ft X ft X 0.5 ft = cu.ft Divide cu.ft by 27 cu.ft/cu.yd to calculate cubic yards: = cu.yd Add 30% for constructability: = cu.yd cu.ft ÷ 27 cu.yd X 1.3 cu.ft ÷ 27 cu.yd X 1.3 cu.ft ÷ 27 Mound Materials Worksheet 6.2 6 5.0 3.0 ft X Project ID: 45.0 cu.yd X 1.3 5.6 0.5 50.1 6.2 3.0 ft X 270.0 1872.0 156.0 6289.3 232.9 232.9 302.8 300.0 300.0 11.1 3.6 10.0 11.1 10.045.0 45 1620 in ) ÷ 12 X cu.ft ÷ 27 50.1 82.2 2060.3 14.4 45.0 1872.0 3918.0 3918.0 145.1 145.1 156.0 10507.3 3918.0 82.2 76.3 99.2 188.6 300.0 270.0 6289.3 1620.0 16.0 2060.3 76.3 10507.3 10.0 v 03.15.2023 1. Media Bed Width:ft 2. Minimum Number of Laterals in system/zone = Rounded up number of [(Media Bed Width - 4) ÷ 3] + 1. [(laterals 3. Designer Selected Number of Laterals:laterals Cannot be less than line 2 (Except in at-grades) 4. Select Perforation Spacing :ft 5. Select Perforation Diameter Size:in 0.1875 6.Length of Laterals = Media Bed Length(1.) - 2 Feet. -2ft=ftPerforation can not be closer then 1 foot from edge. 7. Number of Perforation Spaces = ft ÷ ft =Spaces 8. Spaces + 1 =Perfs. Per Lateral Perf Per Lateral:Perf Per Lateral Equal Split:8 |7 OPTIONAL Perf Per Lateral Non-Equal Split*:| * must not exceed maximum number perfs per lateral in table 9. Perf. Per Lat. X Number of Perf. Lat. = Total Number of Perf. 10.ft 11. Select Type of Manifold Connection (End or Center): 12.Select Lateral Diameter (See Table):in 15 1.50 If Center Manifold Connection the max number of perfs per lateral in the table can be doubled. END Connection CENTER Connection 3 Pressure Distribution Design Worksheet 10 3.0 Does not apply to at-grades Perforations Per Lateral = 3.00 Project ID: 3 3/16 10 45.0 43.0 15 Total Number of Perforations equals the Number of Perforations per Lateral (8.) multiplied by the Number of Perforated Laterals.(3.) 3- 4 ) ÷ 3] + 1 = Determine the Number of Perforation Spaces. Divide the Length of Laterals(6.) by the Perforation Spacing (4.) and round down to the nearest whole number. 14 15 45 143.0 End 43.0 Number of Perforations per Lateral is equal to 1.0 plus the Number of Perforation Spaces(7.). Check table below to verify the number of perforations per lateral guarantees less than a 10% discharge variation. The value is double with a center manifold. Spacing of laterals; Must be greater than 1 foot and no more than 3 feet: Pressure Distribution Design Worksheet 13.Calculate the Square Feet per Perforation. Recommended value is 4-11 ft2 per perforation, Does not apply to At-Grades a. Bed Area = Bed Width (ft) X Bed Length (ft) ft X ft = 450 sq.ft b.Square Foot per Perforation = Bed Area ÷ by the Total Number of Perfs sqft ÷ perf = sq.ft/perf 14. Select Minimum Average Head :ft 15. Select Perforation Discharge based on Table: GPM per Perf 16. Perfs X GPM per Perforation = GPM 17.Volume of Liquid Per Foot of Distribution Piping (Table II): Gallons/ft 18.Volume of Distribution Piping = X ft X gal/ft =Gallons 19. Minimum Delivered Volume = Volume of Distribution Piping X 4 Gallons 20. Maximum Delivered Volume = Design flow x 25% Gallons 21. Minimum Delivered vs Maximum Delivered evaluation: Comments/Special Design Considerations: 1.0 Number of Perforated Laterals(3.) X Length of Laterals(6.) X Volume of Liquid Per Foot of Distribution Piping (17.) 0.110 450 45 0.41 19 Flow Rate = Total Number of Perfs(9.) X Perforation Discharge(15.) 0.41 10.045 gals X 4 =14.2 3 56.8 43 0.110 14.2 450.0 gpd X 25% = 112.5 Volume ratio correct 10 45 1. PUMP CAPACITY v 03.15.2023 A.If pumping to gravity enter the gallon per minute of the pump:GPM (10 - 45 gpm) B.GPM C.Enter pump description: A.ft B.ft C. D.in ft E. Friction Loss = F. ft X 1.25 =ft G. ft per 100ft X ft ÷ 100 =ft H. ft +ft +ft +ft = ft GPM with at least feet of total head. Determine Equivalent Pipe Length from pump discharge to soil dispersal area discharge point. Estimate by adding 25% to supply pipe length for fitting loss. Supply Pipe Length X 1.25 = Equivalent Pipe Length 3. PUMP SELECTION A pump must be selected to deliver at least 19.0 11.7 Goulds Pump PE41 Pump Curve: 51 GPM @ 11.7 TDH Elevation Difference: Pump Intake (BURY DEPTH OF 4 FEET FROM 942.0') 933.5' to 940.0' = 6.5' Comments: 6.5 5.0 11.70.2 Elevation Difference 6.5 1.02 16.3 ft (due to special equipment, etc.)Additional Head Loss*: 0.2 Friction Loss in Plastic Pipe per 100ft from Table I: 1.02 ft per 100ft of pipe 13 16.3 Calculate Supply Friction Loss by multiplying Friction Loss Per 100ft(E.) by the Equivalent Pipe Length(F.) and divide by 100. Supply Friction Loss = between pump and point of discharge: Distribution Head Loss:5 1. Supply Pipe Diameter: 2. Supply Pipe Length: Total Head requirement is the sum of the Elevation Difference(2A) + Distribution Head Loss(2B) + Additional Head Loss(2C) + Supply Friction Loss(2G) * Common additional head loss: gate valve = 1 ft each, globe valve = 1.5 ft each, splitter valve = see manufacturers details 2.0 13 Basic STA Pump Selection Design Worksheet If pumping to a pressurized distribution system: 2. HEAD REQUIREMENTS Project ID: Pumping to Gravity or Pressure Distribution: 19.0 Pressure Demand Dosing v 03.15.2023 1. A.Design Flow (Design Sum.1A):GPD C. Tank Use: B. Min. required pump tank capacity: Gal D. Recommended pump tank capacity: Gal 2. A. Tank Manufacturer: B. Tank Model: C. Capacity from manufacturer: Gallons D. Gallons per inch from manufacturer: Gallons per inch E. Liquid depth of tank from manufacturer: inches 3. (Pump and block height + 2 inches) X Gallons Per Inch(2D) (in +2 inches) X Gallons Per Inch =Gallons 4. -Item 19 of the Pressure Distribution STA or Item 11 of Non-level STA Gallons (Minimum dose)inches/dose 5. Calculate Maximum Pumpout Volume (25% of Design Flow(1A)) Design Flow: GPD X 0.25 =Gallons (Maximum dose)inches/dose 6.Gallons 7.Calculate Doses Per Day = Design Flow(1A) ÷ Delivered Volume(6.) Doses* * Doses need to be equal to or greater than 4 8. Calculate Drainback: A.Diameter of Supply Pipe= inches B. Length of Supply Pipe = feet C.Volume of Liquid Per Lineal Foot of Pipe = Gallons/ft D.Drainback = Length of Supply Pipe(8B) X Volume of Liquid Per Lineal Foot of Pipe(8C) ft X gal/ft =Gallons 9.Total Dosing Volume = Delivered Volume(6.) + Drainback (8D) gal +gal = Gallons 10. Minimum Alarm Volume = Depth of alarm (2 or 3 inches) X gallons per inch of tank(2D) in X gal/in = Gallons 11. Reserve Capacity Volume = [Tank Liquid Depth(2E) - Alarm Float Depth(10.)] x gallons per inch of tank(2D) [in -in ] X Gallons DEMAND DOSE FLOAT SETTINGS Alarm and Pump are to be wired on separate circuits and inspected by the electrical inspector 12. Calculate Float Separation Distance using Dosing Volume . Total Dosing Volume(9.) ÷ Gallons Per Inch(2D) inches 13. Measuring from bottom of tank: A.Distance to set Pump Off Float = Pump + block height + 2 inches Inches for Dose: 4.5 in inches Alarm Depth 19.5 in 512.8 Gal B.Distance to set Pump On Float=Distance to Set Pump-Off Float(13A) + Float Separation Distance(12.) Pump On 16.5 in 75.0 Gal in +in =inches Pump Off 12.0 in 112 Gal C.Distance to set Alarm Float = Distance to set Pump-On Float(13B) + Alarm Depth (2-3 inches)(10.)300 Gal in +in =inches 40.0 25.0 512.8 gal/in = 19.5 10 13 2.2 2 110 450 25.0 2.3 4.5 Select a pumpout volume that meets both Minimum and Maximum: 12 gal/in =gal ÷ 16 10 12 25.0 Calculate Volume to Cover Pump (The inlet of the pump must be at least 4-inches from the bottom of the pump tank & 2 inches of water covering the pump is recommended) 57 4.5 3.0 112 1000 25.0 300 gpd ÷ gal = 1916 4.5 75.025.0 112 110 113 13 3 in + 2 in = 1000 0.170 DETERMINE DOSING VOLUME 450 1000 Wieser Concrete W1000-R Note: Design calculations are based on this specific tank. Substituting a different tank model will change the pump float or timer settings. Contact designer if changes are necessary. 40.0 2.2 4.09 110 0.170 Minimum Delivered Volume = 4 X Volume of Distribution Piping: STA Dosing Pump Tank Design Worksheet (Demand Dose) Project ID: DETERMINE TANK CAPACITY AND DIMENSIONS 450 Dosing - 1 - Septic System Management Plan for Above Grade Systems The goal of a septic system is to protect human health and the environment by properly treating wastewater before returning it to the environment. Your septic system is designed to kill harmful organisms and remove pollutants before the water is recycled back into our lakes, streams and groundwater. This management plan will identify the operation and maintenance activities necessary to ensure long- term performance of your septic system. Some of these activities must be performed by you, the homeowner. Other tasks must be performed by a licensed septic maintainer or service provider. However, it is YOUR responsibility to make sure all tasks get accomplished in a timely manner. The University of Minnesota’s Septic System Owner’s Guide contains additional tips and recommendations designed to extend the effective life of your system and save you money over time. Proper septic system design, installation, operation and maintenance means safe and clean water! Property Owner Email Property Address Property ID System Designer Contact Info System Installer Contact Info Service Provider/Maintainer Contact Info Permitting Authority Contact Info Permit # Date Inspected Keep this Management Plan with your Septic System Owner’s Guide. The Septic System Owner’s Guide includes a folder to hold maintenance records including pumping, inspection and evaluation reports. Ask your septic professional to also: •Attach permit information, designer drawings and as-built of your system, if they are available. •Keep copies of all pumping records and other maintenance and repair invoices with this document. •Review this document with your maintenance professional at each visit; discuss any changes in product use, activities, or water-use appliances. For a copy of the Septic System Owner’s Guide, visit www.bookstores.umn.edu and search for the word “septic” or call 800-322-8642. For more information see http://septic.umn.edu Version: August 2015 Septic System Management Plan for Above Grade Systems - 2 - Your Septic System Septic System Specifics System Type: I II III IV* V* (Based on MN Rules Chapter 7080.2200 – 2400) *Additional Management Plan required System is subject to operating permit* System uses UV disinfection unit* Type of advanced treatment unit ______________ Dwelling Type Well Construction Number of bedrooms: ______________________ System capacity/ design flow (gpd): __________ Anticipated average daily flow (gpd): __________ Comments________________________________ Business? : Y N What type? _______________ Well depth (ft): __________________________ Cased well Casing depth: ___________ Other (specify): ___________________ Distance from septic (ft):____________________ Is the well on the design drawing? Y N Septic Tank First tank Tank volume: ________ gallons Does tank have two compartments? Y N Second tank Tank volume: ________ gallons Tank is constructed of __________________ Effluent screen: Y N Alarm Y N Pump Tank _________ gallons Effluent Pump make/model:_______________ Pump capacity ___________ GPM TDH _________ Feet of head Alarm location _________________________ Soil Treatment Area (STA) Mound/At-Grade area (width x length):____ ft x ____ ft Rock bed size (width x length): _____ ft x _____ ft Location of additional STA: _______________________ Type of distribution media: _______________________ Inspection ports Cleanouts Surface water diversions Additional STA not available Septic System Management Plan for Above Grade Systems - 3 - Homeowner Management Tasks These operation and maintenance activities are your responsibility. Chart on page 6 can help track your activities. Your toilet is not a garbage can. Do not flush anything besides human waste and toilet paper. No wet wipes, cigarette butts, disposal diapers, used medicine, feminine products or other trash! The system and septic tanks needs to be checked every _____ months Your service provider or pumper/maintainer should evaluate if your tank needs to be pumped more or less often. Seasonally or several times per year • Leaks. Check (listen, look) for leaks in toilets and dripping faucets. Repair leaks promptly. • Soil treatment area. Regularly check for wet or spongy soil around your soil treatment area. If surfaced sewage or strong odors are not corrected by pumping the tank or fixing broken caps and leaks, call your service professional. Untreated sewage may make humans and animals sick. Keep bikes, snowmobiles and other traffic off and control borrowing animals. • Alarms. Alarms signal when there is a problem; contact your service professional any time the alarm signals. • Lint filter. If you have a lint filter, check for lint buildup and clean when necessary. If you do not have one, consider adding one after washing machine. • Effluent screen. If you do not have one, consider having one installed the next time the tank is cleaned along with an alarm. Annually • Water usage rate. A water meter or another device can be used to monitor your average daily water use. Compare your water usage rate to the design flow of your system (listed on the next page). Contact your septic professional if your average daily flow over the course of a month exceeds 70% of the design flow for your system. • Caps. Make sure that all caps and lids are intact and in place. Inspect for damaged caps at least every fall. Fix or replace damaged caps before winter to help prevent freezing issues. • Water conditioning devices. See Page 5 for a list of devices. When possible, program the recharge frequency based on water demand (gallons) rather than time (days). Recharging too frequently may negatively impact your septic system. Consider updating to demand operation if your system currently uses time, • Review your water usage rate. Review the Water Use Appliance chart on Page 5. Discuss any major changes with your service provider or pumper/maintainer. During each visit by a service provider or pumper/maintainer • Make sure that your service professional services the tank through the manhole. (NOT though a 4” or 6” diameter inspection port.) • Ask how full your tank was with sludge and scum to determine if your service interval is appropriate. • Ask your pumper/maintainer to accomplish the tasks listed on the Professional Tasks on Page 4. Septic System Management Plan for Above Grade Systems - 4 - Professional Management Tasks These are the operation and maintenance activities that a pumper/maintainer performs to help ensure long-term performance of your system. At each visit a written report/record must be provided to homeowner. Plumbing/Source of Wastewater •Review the Water Use Appliance Chart on Page 5 with homeowner. Discuss any changes in water use and the impact those changes may have on the septic system. •Review water usage rates (if available) with homeowner. Septic Tank/Pump Tanks •Manhole lid. A riser is recommended if the lid is not accessible from the ground surface. Insulate the riser cover for frost protection. •Liquid level. Check to make sure the tank is not leaking. The liquid level should be level with the bottom of the outlet pipe. (If the water level is below the bottom of the outlet pipe, the tank may not be watertight. If the water level is higher than the bottom of the outlet pipe of the tank, the effluent screen may need cleaning, or there may be ponding in the soil treatment area.) •Inspection pipes. Replace damaged or missing pipes and caps. •Baffles. Check to make sure they are in place and attached, and that inlet/outlet baffles are clear of buildup or obstructions. •Effluent screen. Check to make sure it is in place; clean per manufacturer recommendation. Recommend retrofitted installation if one is not present. •Alarm. Verify that the alarm works. •Scum and sludge. Measure scum and sludge in each compartment of each septic and pump tank, pump if needed. Pump •Pump and controls. Check to make sure the pump and controls are operating correctly. •Pump vault. Check to make sure it is in place; clean per manufacturer recommendations. •Alarm. Verify that the alarm works. •Drainback. Check to make sure it is draining properly. •Event counter or elapsed time meter. Check to see if there is an event counter or elapsed time meter for the pump. If there is one or both, calculate the water usage rate and compare to the anticipated use listed on Design and Page 2. Dose Volume: __________ gallons: Pump run time: _________ Minutes Soil Treatment Area •Inspection pipes. Check to make sure they are properly capped. Replace caps and pipes that are damaged. •Surfacing of effluent. Check for surfacing effluent or other signs of problems. •Lateral flushing. Check lateral distribution; if cleanouts exist, flush and clean at recommended frequency. •Vegetation - Check to see that a good growth of vegetation is covering the system. All other components – evaluate as listed here: Septic System Management Plan for Above Grade Systems - 5 - Water-Use Appliances and Equipment in the Home Appliance Impacts on System Management Tips Garbage disposal •Uses additional water. •Adds solids to the tank. •Finely-ground solids may not settle. Unsettled solids can exit the tank and enter the soil treatment area. •Use of a garbage disposal is not recommended. •Minimize garbage disposal use. Compost instead. •To prevent solids from exiting the tank, have your tank pumped more frequently. •Add an effluent screen to your tank. Washing machine •Washing several loads on one day uses a lot of water and may overload your system. •Overloading your system may prevent solids from settling out in the tank. Unsettled solids can exit the tank and enter the soil treatment area. •Choose a front-loader or water-saving top-loader, these units use less water than older models. •Limit the addition of extra solids to your tank by using liquid or easily biodegradable detergents. Limit use of bleach-based detergents and fabric softeners. •Install a lint filter after the washer and an effluent screen to your tank •Wash only full loads and think even – spread your laundry loads throughout the week. Dishwasher •Powdered and/or high-phosphorus detergents can negatively impact the performance of your tank and soil treatment area. •New models promote “no scraping”. They have a garbage disposal inside. •Use gel detergents. Powdered detergents may add solids to the tank. •Use detergents that are low or no-phosphorus. •Wash only full loads. •Scrape your dishes anyways to keep undigested solids out of your septic system. Grinder pump (in home) •Finely-ground solids may not settle. Unsettled solids can exit the tank and enter the soil treatment area. •Expand septic tank capacity by a factor of 1.5. •Include pump monitoring in your maintenance schedule to ensure that it is working properly. •Add an effluent screen. Large bathtub (whirlpool) •Large volume of water may overload your system. •Heavy use of bath oils and soaps can impact biological activity in your tank and soil treatment area. •Avoid using other water-use appliances at the same time. For example, don’t wash clothes and take a bath at the same time. •Use oils, soaps, and cleaners in the bath or shower sparingly. Clean Water Uses Impacts on System Management Tips High-efficiency furnace •Drip may result in frozen pipes during cold weather. •Re-route water directly out of the house. Do not route furnace discharge to your septic system. Water softener Iron filter Reverse osmosis •Salt in recharge water may affect system performance. •Recharge water may hydraulically overload the system. •These sources produce water that is not sewage and should not go into your septic system. •Reroute water from these sources to another outlet, such as a dry well, draintile or old drainfield. •When replacing, consider using a demand-based recharge vs. a time-based recharge. •Check valves to ensure proper operation; have unit serviced per manufacturer directions Surface drainage Footing drains •Water from these sources will overload the system and is prohibited from entering septic system. Septic System Management Plan for Above Grade Systems - 6 - Homeowner Maintenance Log Track maintenance activities here for easy reference. See list of management tasks on pages 3 and 4. Activity Date accomplished Check frequently: Leaks: check for plumbing leaks* Soil treatment area check for surfacing** Lint filter: check, clean if needed* Effluent screen (if owner-maintained)*** Alarm** Check annually: Water usage rate (maximum gpd _____) Caps: inspect, replace if needed Water use appliances – review use Other: *Monthly **Quarterly ***Bi-Annually Notes: “As the owner of this SSTS, I understand it is my responsibility to properly operate and maintain the sewage treatment system on this property, utilizing the Management Plan. If requirements in this Management Plan are not met, I will promptly notify the permitting authority and take necessary corrective actions. If I have a new system, I agree to adequately protect the reserve area for future use as a soil treatment system.” Property Owner Signature: Date Management Plan Prepared By: Certification # Permitting Authority: ©2015 Regents of the University of Minnesota. All rights reserved. The University of Minnesota is an equal opportunity educator and employer. This material is available in alternative formats upon request. Contact the Water Resources Center, 612-624-9282. The Onsite Sewage Treatment Program is delivered by the University of Minnesota Extension Service and the University of Minnesota Water Resources Center. HIGH LEVEL ALARM - 3" ABOVE PUMP ON - _____"3.0 in12.0 inDEMAND ON/OFF - DOSE - _____"- PUMP OFF - 12.0 "- PUMP ON - _____" PL-525 Filter The PL-525 Filter is rated for 10,000 GPD (gallons per day) making it one of the largest filters in its class. It has 525 linear feet of 1/16” filtration slots. Like the Polylok PL-122, the Polylok PL-525 has an automatic shut-off ball installed with every filter. When the filter is removed for cleaning, the ball will float up and temporarily shut off the system so the effluent won’t leave the tank. Features: • Rated for 10,000 GPD (gallons per day). • 525 linear feet of 1/16” filtration. • Accepts 4’’ and 6’’ SCHD 40 pipe. • Built in gas deflector. • Automatic shut-off ball when filter is removed. • Alarm accessibility. • Accepts PVC extension handle. PL-525 Installation: Ideal for residential and commercial waste flows up to 10,000 gallons per day (GPD). 1. Locate the outlet of the septic tank. 2. Remove the tank cover and pump tank if necessary. 3. Glue the filter housing to the 4” or 6” outlet pipe. If the filter is not centered under the access opening use a Polylok Extend & Lok or piece of pipe to center filter. 4. Insert the PL-525 filter into its housing. 5. Replace and secure the septic tank cover. PL-525 Maintenance: The PL-525 Effluent Filters will operate efficiently for several years under normal conditions before requiring cleaning. It is recommended that the filter be cleaned every time the tank is pumped, or at least every three years. If the installed filter contains an optional alarm, the owner will be notified by an alarm when the filter needs servicing. Servicing should be done by a certified septic tank pumper or installer. 1. Locate the outlet of the septic tank. 2. Remove tank cover and pump tank if necessary. 3. Do not use plumbing when filter is removed. 4. Pull PL-525 cartridge out of the housing. 5. Hose off filter over the septic tank. Make sure all solids fall back into septic tank. 6. Insert the filter cartridge back into the housing making sure the filter is properly aligned and completely inserted. 7. Replace and secure septic tank cover. PL-525 Effluent Filter Accepts 4” & 6” SCHD 40 pipe 10,000 GPD 1/16” Filtration Slots p p & 6” ipe 00 GPD00 GPD ltration Slots Accepts 1” PVC Extension Handle Alarm Switch (Optional) Rated for 10,000 GPD Gas Deflector Automatic Shut-Off Ball 525 Linear Ft. of 1/16” Filtration Slots Outdoor SmartFilter® Alarm Polylok, Zabel & Best filters accept the SmartFilter® switch and alarm. Extend & Lok™ Easily installs into existing tanks. Ed&Lk™ Polylok, Inc. 3 Fairfield Blvd. Wallingford, CT 06492 Toll Free: 877.765.9565 Fax: 203.284.8514 www.polylok.com TECHNICAL BROCHURE BPE R2 PE SUBMERSIBLE EFFLUENT PUMP PAGE 2 Wastewater Goulds Water Technology FEATURES • Corrosion resistant construction • Cast iron body • Thermoplastic impeller and cover • Upper sleeve and lower heavy duty ball bearing construction • Motor is permanently lubricated for extended service life • Powered for continuous operation • All ratings are within the working limits of the motor • Quick disconnect power cord, 20' standard length, heavy duty 16/3 SJTW with 115 or 230 volt grounding plug • Complete unit is heavy duty, portable and compact • Mechanical seal is carbon, ceramic, BUNA and stainless steel • Stainless steel fasteners APPLICATIONS Specially designed for the following uses: • Mound Systems • Effluent/Dosing Systems • Low Pressure Pipe Systems • Basement Draining • Heavy Duty Sump/Dewatering SPECIFICATIONS Pump – General: • Discharge: 11⁄2" NPT • Temperature: 104ºF (40ºC) maximum, continuous when fully submerged. • Solids handling: 1⁄2" maximum sphere. • Automatic models include a float switch. • Manual models available. • Pumping range: see performance chart or curve. PE31 Pump: • Maximum capacity: 53 GPM • Maximum head: 25’ TDH PE41 Pump: • Maximum capacity: 61 GPM • Maximum head: 29' TDH PE51 Pump: • Maximum capacity: 70 GPM • Maximum head: 37' TDH MOTOR General: • Single phase, 60 Hz, 115 and 230 volts • Built-in thermal overload protection with automatic reset • Class B insulation • Oil-filled design • High strength carbon steel shaft PE31 Motor: • .33 HP, 3000 RPM • 115 volts • Shaded pole design PE41 Motor: • .40 HP, 3400 RPM • 115 and 230 volts • PSC design PE51 Motor: • .50 HP, 3400 RPM • 115 and 230 volts • PSC design AGENCY LISTINGS USC ® Tested to UL 778 and CSA 22.2 108 Standards By Canadian Standards Association File #LR38549 PAGE 3 Wastewater Goulds Water Technology 0 0102030 5 10 15 20 25 FEET TOTAL DYNAMIC HEADCAPACITY GPM 30 70 m3/h METERS 0 10 0510 MODELS: PE31, PE41, PE51 HP: .33, .40, .5035 40 40 50 60 80 15 PE31 PE41 1 FT 2 GPM PE51 PUMP INFORMATION Order No.HP Volts Amps Minimum Circuit Breaker Phase Float Switch Style Cord Length Discharge Connection Minimum Basin Diameter Maximum Solids Size Shipping Weight lbs/kg PE31M 0.33 115 12 20 1 Manual / No Switch 20'1.5"18".5"31 / 14.1 PE31P1 Piggyback Float Switch PE41M 0.4 7.5 15 Manual / No Switch PE41P1 Piggyback Float Switch PE42P1 230 3.7 10 Piggyback Float Switch PE51M 0.5 115 9.5 20 Manual / No Switch PE51P1 Piggyback Float Switch PE52M 230 4.7 10 Manual / No Switch PE52P1 Piggyback Float Switch 9.6 2.2 6.46.4 9.6 2.2 12.1 12.0 .6 3.1 11⁄2” NPT DISCHARGE 3.1 12.1 12.0 .6 1½" NPT DISCHARGE DIMENSIONS (All dimensions are in inches. Do not use for construction purposes.) Goulds is a registered trademark of Goulds Pumps, Inc. and is used under license. © 2020 Xylem Inc. BPE R2 March 2020 Xylem Inc. 2881 East Bayard Street Ext., Suite A Seneca Falls, NY 13148 Phone: (866) 325-4210 Fax: (888) 322-5877 www.xylem.com/goulds PERFORMANCE RATINGS PE31 Total Head (feet of water)GPM 5 52 10 42 15 29 20 16 25 0 PE41 Total Head (feet of water)GPM 8 61 10 57 15 46 20 33 25 16 PE51 Total Head (feet of water)GPM 10 67 15 59 20 50 25 39 30 26 35 8 SITE RESEARCH SCHEMATIC DESIGNBASIS OF DESIGNOTTO RESIDENCE 6 Custom Soil Resource ReportSoil Map 49846304984640498465049846604984670498468049846904984700498471049847204984630498464049846504984660498467049846804984690498470049847104984720504710 504720 504730 504740 504750 504760 504770 504710 504720 504730 504740 504750 504760 504770 45° 0' 57'' N 92° 56' 25'' W45° 0' 57'' N92° 56' 21'' W45° 0' 54'' N 92° 56' 25'' W45° 0' 54'' N 92° 56' 21'' WN Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 15N WGS84 0 20 40 80 120Feet 0 5 10 20 30Meters Map Scale: 1:485 if printed on A portrait (8.5" x 11") sheet. Soil Map may not be valid at this scale. Map Unit Legend Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 12D Emmert gravelly loamy coarse sand, 15 to 25 percent slopes 0.2 20.3% 1033 Udifluvents 0.6 79.7% Totals for Area of Interest 0.8 100.0% Map Unit Descriptions The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit. A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class. Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils. Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, Custom Soil Resource Report 8 Washington County, Minnesota 12D—Emmert gravelly loamy coarse sand, 15 to 25 percent slopes Map Unit Setting National map unit symbol: 1t939 Elevation: 700 to 1,600 feet Mean annual precipitation: 28 to 36 inches Mean annual air temperature: 39 to 48 degrees F Frost-free period: 120 to 170 days Farmland classification: Not prime farmland Map Unit Composition Emmert and similar soils:90 percent Minor components:10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Emmert Setting Landform:Pitted outwash plains Landform position (two-dimensional):Shoulder Down-slope shape:Convex Across-slope shape:Convex Parent material:Outwash Typical profile Ap - 0 to 6 inches: loamy coarse sand Bw,C - 6 to 60 inches: extremely gravelly coarse sand Properties and qualities Slope:15 to 25 percent Depth to restrictive feature:More than 80 inches Drainage class:Excessively drained Capacity of the most limiting layer to transmit water (Ksat):Very high (19.98 in/hr) Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Available water supply, 0 to 60 inches: Very low (about 2.1 inches) Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 7s Hydrologic Soil Group: A Ecological site: F090AY019WI - Dry Sandy Uplands Forage suitability group: Sandy (G090XN022MN) Other vegetative classification: Sandy (G090XN022MN) Hydric soil rating: No Minor Components Kingsley Percent of map unit:5 percent Hydric soil rating: No Custom Soil Resource Report 10 Chetek Percent of map unit:5 percent Hydric soil rating: No 1033—Udifluvents Map Unit Setting National map unit symbol: 1t96x Elevation: 670 to 1,070 feet Mean annual precipitation: 28 to 36 inches Mean annual air temperature: 39 to 48 degrees F Frost-free period: 120 to 170 days Farmland classification: Not prime farmland Map Unit Composition Udifluvents and similar soils:90 percent Minor components:10 percent Estimates are based on observations, descriptions, and transects of the mapunit. Description of Udifluvents Setting Landform:Shorelines Down-slope shape:Linear Across-slope shape:Linear Parent material:Sandy beach sediments Properties and qualities Slope:0 to 6 percent Depth to restrictive feature:More than 80 inches Drainage class:Somewhat poorly drained Depth to water table:More than 80 inches Frequency of flooding:None Frequency of ponding:None Interpretive groups Land capability classification (irrigated): None specified Land capability classification (nonirrigated): 4w Ecological site: F090AY009WI - Moist Sandy Lowland Forage suitability group: Sloping Upland, Low AWC, Acid (G090XN008MN) Other vegetative classification: Sloping Upland, Low AWC, Acid (G090XN008MN) Hydric soil rating: No Minor Components Aquolls, ponded Percent of map unit:10 percent Landform:Depressions on moraines Down-slope shape:Concave Across-slope shape:Concave Custom Soil Resource Report 11 Ecological site:F090AY006WI - Wet Loamy Lowland Other vegetative classification:Not Suited (G090XN024MN) Hydric soil rating: Yes Custom Soil Resource Report 12 Septic Tank Absorption Fields (MN)–Washington County, Minnesota Map symbol and soil name Pct. of map unit Septic Tank Absorption Fields - At-Grade Septic Tank Absorption Fields - Mound Septic Tank Absorption Fields - Trench Rating class and limiting features Value Rating class and limiting features Value Rating class and limiting features Value 12D—Emmert gravelly loamy coarse sand, 15 to 25 percent slopes Emmert 90 Very limited Extremely limited Very limited >= 35% Rock Frags 0.90 Slope 1.00 >= 35% Rock Frags 0.90 Slope 0.73 >= 35% Rock Frags 0.90 Slope 0.73 Excessive percolation 0.32 1033—Udifluvents Udifluvents 90 Not rated Not rated Not rated Custom Soil Resource Report 15 4/25/23, 5:01 PM Minnesota Well Index https://mnwellindex.web.health.state.mn.us/#1/1 8286 Hidden Bay Ct N, Lake Elmo, Minnesota, 55042 UTM: 505465 (x), 4984666 (y) Latitude/Longitude: 45.01542 / -92.93064Township: 29 North, Range: 21 West, Section: 9, City/Township: Lake Elmo MN Department of Health | Minnesota Department of Health, Environmental Health Division, Drink… + – 0 0.2 0.4mi Layer Name Layer Label Legend Wells Selected Wells Public Wells Domestic Wells Irrigation Wells Monitor Wells Other Wells Sealed Wells Unverified Wells Township RangeSection DWSMA SWBCA Zoom to see wells, TRS, DWSMA and SWBCA DWSMA: The area managed by a public watersupplier to protect their source water SWBCA: Special Well and Boring ConstructionArea layer ⇗ Minnesota Department of Health Minnesota Well Index Search by Zoom to Tools Base Maps Other Links Help 8286 Hidden Bay Ct N, Lake Elmo, MN, 5504 Version 2.0.85, 11/19/21 3:34PM 4/25/23, 4:59 PM Minnesota Well Index https://mnwellindex.web.health.state.mn.us/#1/1 UTM: 504836 (x), 4984775 (y) Latitude/Longitude: 45.01641 / -92.93862Click map to get township, range and section MN Department of Health | Minnesota Geological Survey, University of Minnesota and the Minneso… + – 0 150 300ft Layer Name Layer Label Legend Wells Selected Wells Public Wells Domestic Wells Irrigation Wells Monitor Wells Other Wells Sealed Wells Unverified Wells Township RangeSection DWSMA SWBCA Zoom to see wells, TRS, DWSMA and SWBCA DWSMA: The area managed by a public watersupplier to protect their source water SWBCA: Special Well and Boring ConstructionArea layer ⇗ Minnesota Department of Health Minnesota Well Index Search by Zoom to Tools Base Maps Other Links Help 8286 Hidden Bay Ct N, Lake Elmo, MN, 5504 Version 2.0.85, 11/19/21 3:34PM 1 Sophia Jensen From:Jack Griffin <Jack.Griffin@focusengineeringinc.com> Sent:Tuesday, June 20, 2023 6:36 PM To:Sophia Jensen Cc:Chad Isakson Subject:8286 Hidden Bay Trail Caution: This email originated outside our organization; please use caution. Sophia, Engineering does not have any comments related to the 4 variance requests at 8286 Hidden Bay Trail. It appears the requested variances are essentially a continuation of existing non conforming conditions. The septic system design will need to meet the approvals of Washington County. Thanks ~Jack John (Jack) W. Griffin, P.E. Principal / Sr. Municipal Engineer FOCUS ENGINEERING, INC. 651.300.4264 jack.griffin@focusengineeringinc.com 1 Sophia Jensen From:Dustin Kalis Sent:Thursday, June 22, 2023 1:41 PM To:Sophia Jensen Subject:RE: Lake Elmo Land Use Review - 8286 Hidden Bay Trl The Lake Elmo Fire Department has the following comments: 8286 Hidden Bay Trl Variance: Building address numbers shall be plainly visible from the street fronting the property and shall contrasting color from the background. Addresses may be required to be posted adjacent to driveways or other access ways. Dustin Kalis | Fire Chief Lake Elmo Fire Department Fire Station #1 - 3510 Laverne Ave N. | Lake Elmo, MN | 55042 651-747-3933 office | www.lakeelmo.org 1 Sophia Jensen From:John P. Hanson <JHanson@barr.com> Sent:Monday, June 26, 2023 8:39 AM To:Sophia Jensen Cc:Scollan, Daniel (DNR) Subject:RE: Lake Elmo Land Use Review - June 1st Batch Caution: This email originated outside our organization; please use caution. Sophia‐ The proposed home at 8286 Hidden Bay Court North needs to be raised. The VBWD‐established 100‐year flood level of Olson Lake is 931.8 (NAVD88) and the lowest floor needs to be at least 2 feet higher. Less than 6,000 square feet of new and fully reconstructed impervious surface is proposed so permanent stormwater management isn’t required, but it’s still encouraged. A minimum 35‐foot‐wide buffer strip measured perpendicular to the OHW extending 35 feet inland shall be provided. A mowed access path and shoreline are allowed but must not exceed 30% of the landowner’s shoreline width or 30 feet, whichever is less. For shorelines less than 20 feet wide, a 6‐foot‐wide access path is allowed. Access paths shall not be located where concentrated runoff will flow to the lake. Buffer vegetation shall not be cultivated, cropped, pastured, mowed, fertilized, subject to the placement of mulch, yard waste, or snow piles, or otherwise disturbed, except for periodic cutting or burning that promotes the health of the buffer, actions to address disease or invasive species, mowing for purposes of public safety, temporary disturbance for placement or repair of buried utilities, or other actions to maintain or improve buffer quality, each as approved by the VBWD or when implemented pursuant to a written agreement executed with the VBWD. No new structure or impervious surface shall be placed within a buffer. Temporary erosion controls need to be installed and maintained between the proposed grading and the lake. John John P. Hanson, PE Valley Branch Watershed District Engineer Barr Engineering Co. | 4300 MarketPointe Drive | Bloomington, MN 55435 office: 952.832.2622 | cell: 612.590.1785 JHanson@barr.com | www.barr.com | www.vbwd.org 1 Sophia Jensen From:Scollan, Daniel (DNR) <daniel.scollan@state.mn.us> Sent:Friday, June 30, 2023 10:25 AM To:Sophia Jensen Cc:John P. Hanson Subject:RE: Lake Elmo Land Use Review - June 1st Batch Caution: This email originated outside our organization; please use caution. Hello Sophia: The application proposes removal of numerous trees located between the principal structure and Lake Olson. These trees provide important shoreland habitat and provide screening of structures as viewed from the water. If the City determines that the variance criteria have been met, DNR recommends the city require a tree replacement plan as a condition of approval. The proposed increase of impervious surface from existing conditions, 4,754 SF (18.3%) to proposed conditions, 5,649 SF (21.8%), should be carefully scrutinized. The application, for example, does not explain why the driveway area needs to be expanded from the existing condition of 1775 SF to 1941 SF to provide for adequate ingress/egress. We recommend requiring the applicant to maintain the existing footprint of the driveway. Best Regards, Dan Scollan East Metro Area Hydrologist – Ramsey and Washington Counties Division of Ecological and Water Resources Minnesota Department of Natural Resources 1200 Warner Road St. Paul, MN 55106 Phone: 651‐259‐5732 Fax: 651‐772‐7977 Email: daniel.scollan@state.mn.us mndnr.gov From: Sophia Jensen <SJensen@lakeelmo.org> Sent: Thursday, June 29, 2023 7:24 AM To: Scollan, Daniel (DNR) <daniel.scollan@state.mn.us> Subject: RE: Lake Elmo Land Use Review ‐ June 1st Batch Link Lavey 8510 Hidden Bay Trl N Lake Elmo, MN 55042 July 11th, 2023 Sophia Jensen City Planner City of Lake Elmo 3800 Laverne Ave N Lake Elmo, MN 55042 Dear Sophia Jensen: Thank you for taking the time to meet with me today. As mentioned in our conversation I have been the President of the Lake Demontreville and Olson Association (LDO) for the past six years, and am also member of the VBWD Citizen Advisory Committee. The LDO is focused on the health of lakes Demontreville and Olson. We spend approximately $40,000 annually fighting invasive species and controlling algae. Additionally, we take water samples for the Met Council, sponsor educational programs, lake clean up days and work with other local partners. These efforts are so everyone can enjoy these great resources we have here in Lake Elmo. The variance requests for the property located at 8286 Hidden Bay CT are very concerning. The property is already noncompliant with existing building codes in its current location. Any variances could have a further negative impact on surface and subsurface (septic) drainage into the lakes. Either of these would add additional unwanted nutrients into the lakes and upset the balance we are working very hard to manage. I do realize that not all properties are able to meet all city building codes. However, I do ask that any deviation from current codes please consider the potential environmental impact to a recreational resource shared and enjoyed by many. Sincerely, Link Lavey 1 Sophia Jensen From:Charles Cadenhead Sent:Tuesday, July 11, 2023 10:01 AM To:Sophia Jensen Cc:kyle.risner@gmail.com Subject:8286 Hidden Bay Ct - Variance Request Sophia, I need to pass along some information that came from a resident, but they wish to not be named. They would like to be assured that the committee is aware of the DNR and the VBWSD comments. They are opposed to Variance 1: "They are requesting to be 10.4 feet closer to the OHWM. Part of the LDO (Lake Demontreville/Olson) management program is to maintain and protect these precious natural resources and this cannot be done if we continue to encroach on the OHWM. They are opposed to Variance 2: They do not believe in increasing impervious surface coverage for one self, and then put it in writing as to a "safe egress for adjoining their property". They believe that it is jus for a fancy driveway entrance and that it would be out of character for the neighborhood. They say, "City code is 15%, stick to it. They just want a bigger footprint." They are opposed to Variance 3: "They may not have done their homework nor due diligence when they bought this property and bought it as is. That does not give them an excuse to put a septic system dangerously closer to the water, there are other pump out options. They are requesting it to be 13 feet closer than the existing one. We as neighbors are most concerned about our lakes. Building a home and septic system closer to the lake doesn't make sense. Increasing impervious surfaces, ignoring proper drainage, catch basins and removing large established trees all adds to the degradation of our lakes. We believe that the Otto's current application should not be recommended as presented and our concerns must be addressed in any future plans. Thank you for any and all consideration to this matter." That's their letter in a nutshell. Please let me know if you have any questions. Charles Cadenhead, Jr. City of Lake Elmo, Mayor phone: 651.300.9641 July 13, 2023 Dawn Goracki 2620 5th Ave E North St Paul, MN 55109 Sophia Jensen City Planner City of Lake Elmo 3800 Laverne Ave N Lake Elmo, MN 55042 Dear Sophia Jensen, In response to the Notice of Public Hearing regarding the property at 8286 Hidden Bay Ct., I’d like to make the following comments: Variance 1 – Reduced structure setback from ordinary high-water level. I have no comment regarding this variance. Variance 2 – Reduced septic setback from ordinary high-water level. As a lake property owner, one of the biggest issues we’ve been dealing with is the weeds/algae growth on our lakes. Therefore, I am concerned that by moving a septic system closer to the water will exacerbate the weed/algae situation. In this regard, I believe this decision should be based on recommendations by the experts at VBWSD & the DNR. Variance 3 – Increase in impervious surface for unsewered shoreland lots. The proposed re-landscaping on the NW side of the property creates a slope going toward the neighboring property which is also slightly higher at that point, forming a channel that I presume will funnel any run off right into the lake. Based on the drawing, it appears that area will be all grass, which will require maintenance that will almost certainly cause nutrients to flow freely into the lake. The proposed removal of many established trees is another factor in more run off to the lake. Thank you for considering our concerns. Sincerely, Dawn Goracki 1 Sophia Jensen From:Douglas Huntley <dahuntley1@gmail.com> Sent:Friday, July 21, 2023 9:03 PM To:Sophia Jensen Subject:written input for proposed variances related to 8286 Hidden Bay Ct N Caution: This email originated outside our organization; please use caution. Sophia, My wife and I are next door neighbors to the Ottos as we have lived at 8290 Hidden Bay Court North for the last 7 years. Jeff and Judy kindly showed the plans for their new home to us and we voiced two concerns with them that they stated they would address with their architect. As we have not seen any plan changes, we wish to also reach out to you in order to follow the prescribed process to provide input. The first concern has to do with the elevation change needed to build up what currently is their basement garage into a first floor entrance. We believe that this elevated and sloped road surface would magnify the amount of rainwater and runoff that naturally occurs today into the back NW part of our property, especially if the road surface is impervious. Today there is an area that collects with water during heavy rains but it drains after a reasonable time. We believe this could become a much bigger issue if the current plan is allowed to proceed. Our second concern is that there appears to be no clear way to handle snow in the current design. We want to make sure that excess snow is not simply moved onto our property and that there is a plan in place to manage. We very much appreciate having the Ottos as neighbors and hope that you will be able to work with them to come to a reasonable solution while still respecting the precedence that will be set with any variances. Kind regards, Doug and Pam Huntley (651) 334-0524 You don't often get email from dahuntley1@gmail.com. Learn why this is important