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Home My WebLink About2016-08-24 Browns Creek Watershed Approval Permit 16-11 memo (T)651.770.8448 / (F)651.770.2552 www.eorinc.com Date I August 24, 2016 To I Karen Kill, BCWD Administrator CC I Sherri Schueller, Minnwest Bank MV; Paul Schroeder, Westwood Professional Services From I Ryan Fleming, PE Regarding I Permit 16-11: Oak Park Heights Furniture Warehouse Engineers Report The following review of the above mentioned project located within the legal jurisdiction of the Brown's Creek Watershed District (BCWD) was conducted to determine compliance with the BCWD rules pursuant to the Board's permit issuance determination for this project. Applicant: Sherri Shueller Permit Submittal Date: August 11, 2016 Completeness Determination: Complete:August 18, 2016 Board Action Required By: Not Applicable—Administrative Permit Approval Review based on BCWD Rules effective May 1, 2007 Recommendation: Approval with recommended conditions Submitted Materials: Civil Site Plan Set Hard Copy& Electronic; Signed 08/12/2016 by Shari S. Ahrens Previous Surveys—ALTA and Topo SWPPP Binder Report—Dated 08/10/2016 GENERAL COMMENTS This review was conducted for a proposed building and parking lot for Oak Park Heights Furniture Warehouse, located in the Second Addition of Oak Park Station, City of Oak Park Heights. The proposed construction includes clearing and grubbing of the existing site, construction of a new retail warehouse building and parking lot as well as installation of site utilities and stormwater management. Overall, the project will disturb 2.8 acres of land. All drainage from the building and parking lot is to be directed to drainage swales that convey water to the Kern Center Pond. The proposed project includes 1.32 acres of impervious area. The Kern Center Cooperative Agreement allows a maximum of 74.4 acres of hard surface within the Kern Center Commercial Area to which the City has allocated Pond capacity. Prior to this permit application, 23.29 acres of impervious surface is allowed for future development within the Kern Center Pond drainage area. EOR is an Equal Opportunity Affirmative Action Employer Emmons&Olivier Resources, Inc. 651 Hale Avenue North Oakdale, Minnesota 55128 N memo Cont. (T)651.770.8448 (F)651.770.2552 www.eorinc.com Rule 2.0—STORMWATER MANAGEMENT E The project maintains drainage to the southbound ditch along Minnesota State Trunk Highway No. 5 and to the drainage swale running down the center of the Kern Center commercial area. Both of these conveyances drain to the Kern Center Pond. • Stormwater management for the site is covered by the Kern Center Pond and Rule 2.0 was satisfied for the site as described in the Kern Center Pond Cooperative Agreement. • The site proposes 1.32 acres of new impervious surface. An additional 0.27 acres of imperious is shown as a Future Expansion area in the submitted plans. This additional impervious area is not considered under this permit. With completion of this project, the total remaining impervious surface allowed for future development within the Kern Center Pond drainage area is 21.97 acres. Rule 3.0—EROSION CONTROL According to BCWD rule 3.2, All persons undertaking any grading, filling, or other land disturbing activities which involve movement of more than fifty (50) cubic yards of earth or removal of vegetative cover on five thousand (5,000) square feet or more of land shall submit an erosion control plan to the District,and secure a permit from the District approving the erosion control plan. n Rule Requirements Met With Conditions The project proposes rock spillways and sod to prevent erosion from disturbed areas. Sediment will be controlled by use of rock check dams in the swales, Rain Guardian Storm Inlets devices at curb cuts and a rock construction pad at the entrances to the site. Discussion: • The plan indicates the use of sod in all disturbed areas surrounding the building and parking lot. Landscaping (sod installation) is not proposed to be conducted until April of 2017 (SWPPP Binder Report — Table 6; p6); in which case temporary means of stabilization in the swale bottoms is necessary during construction. Similarly, inlets to the swales will have Rain Guardian Storm Inlets as the final sediment control BMP, however runoff will need to be controlled and filtered during construction. Conditions: 1. Include the following on the Grading, Drainage and Erosion Control Plan: a) Temporary erosion control measures for swales appropriate for areas of concentrated • flow b) Temporary inlet protection on swale inlets from parking area and on culverts c) Location of stockpiles including method of sediment control d) Location of designated concrete washout area 2. Revise the inspection schedule (SWPPP Binder Report— Table 15;p15)pursuant to BCWD Rule 3.3.2—the permittee shall, at a minimum, inspect, maintain and repair all disturbed surfaces and 2 Emmons&Olivier Resources, Inc. 651 Hale Avenue North Oakdale,Minnesota 55128 memo cont. (T)651.770.8448 (F)651.770.2552 www.eorinc.com all erosion and sediment control facilities and soil stabilization measures every day work is performed on the site, and at least weekly. 3. The project drains to Long Lake, an impaired waterbody for excess nutrients. The fertilizer specified for the project must meet the criteria ofMnDOT Metro District Design guidance to limit phosphate and using slow release Type 3fertilizer. Rule 4.0—LAKE, STREAM, AND WETLAND BUFFER REQUIREMENTS Buffer zone widths are dictated by the presence of a stream or tributary of Brown's Creek and by the quality of lakes or wetlands on the development site. o Rule Not Applicable to Permit Rule 5.0—SHORELINE AND STREAMBANK ALTERATIONS According to BCWD rule 5.0, no person shall construct or install a shoreline or streambank improvement below the ordinary high water mark of a waterbody,without first obtaining a District permit. ❑ Rule Not Applicable to Permit Rule 6.0—WATERCOURSE AND BASIN CROSSINGS According to Rule 6.2, no person shall use the beds of any waterbody within the District for the placement of roads,highways and utilities without first securing a permit from the District. ❑ Rule Not Applicable to Permit Rule 7.0—FLOODPLAIN AND DRAINAGE ALTERATIONS According to BCWD Rule 7.2, no person shall alter or fill land below the 100-year flood elevation of any waterbody, wetland, or stormwater management basin, or place fill in a landlocked basin, without first obtaining a permit from the District. No person shall alter stormwater flows at a property boundary by changing land contours, diverting or obstructing surface or channel flow, or creating a basin outlet, without first obtaining a permit from the District. ❑ Rule Requirements Met The project proposes open stormwater conveyances and a commercial building(Rule 7.3.2). The general drainage directions are to Memorial Avenue North and to the drainage swale running down the center of the Kern Center commercial area are maintained. The lowest proposed floor elevation is 941.0 feet. This allows greater than 2.0 feet of separation between the floor and 100-year high water elevation of Kern Pond(937.9 feet). 3 Emmons&Olivier Resources, Inc. 651 Hale Avenue North Oakdale,Minnesota 55128 memo cont. (T)651.770.8448 (Ft 651.770.2552 www.eorinc.com Rule 8.0—FEES Fees for this project as outlined below: 1. Erosion control fee for grading or alteration of 1.0—4.99 acres $1,250 2. Floodplain and drainage alterations fee $500 TOTAL FEES $1,750 Rule 9.0—SURETIES Sureties for this project are as outlined below: 1. Grading or Alteration (—3 acres) $7,500 ■ TOTAL SURITIES ($5,000 Minimum Performance Surety) $7,500 RECOMMENDED CONDITIONS OF THE PERMIT: The permit application is recommended for approval with the following conditions. All of the conditions must be fully met prior to issuance of the permit. 1. Include the following on the Grading,Drainage and Erosion Control Plan: a) Temporary erosion control measures for swales appropriate for areas of concentrated flow b) Temporary inlet protection on swale inlets from parking area and on culverts c) Location of stockpiles including method of sediment control d) Location of designated concrete washout area 2. Revise the inspection schedule(SWPPP Binder Report—Table 15; p15)pursuant to BCWD Rule 3.3.2—the permittee shall, at a minimum, inspect, maintain and repair all disturbed surfaces and all erosion and sediment control facilities and soil stabilization measures every day work is performed on the site,and at least weekly. 3. The project drains to Long Lake, an impaired waterbody for excess nutrients. The fertilizer specified for the project must meet the criteria of MnDOT Metro District Design guidance to limit phosphate and using slow release Type 3 fertilizer. 4. Replenish the permit fee deposit(BCWD Rule 8.0 and Board Policy): a) Erosion Control fee($1,250) b) Floodplain and Drainage Alteration fee($500) 4 Emmons&Olivier Resources, Inc. 651 Hale Avenue North Oakdale, Minnesota 55128 memo cont. Cr,651.770.8448 (F 651.770.2552 www.eorinc.com If the permit fee deposit is not replenished within 60 days of receiving notice that such deposit is due,the permit application or permit shall be deemed abandoned and all prior approvals shall be revoked and collection proceedings shall begin on unpaid balances. 5. Provide the following required sureties(BCWD Rule 9.0): a) Total grading or alteration surety($7,500) STIPULATIONS OF APPROVAL: 1. Note that the permit, when issued, will require that the applicant notify the District in writing at least three business days prior to commencing land disturbance. (BCWD Rule 3.3.1) 2. Provide the District with As-built record drawings showing that the completed grading conforms to the grading plan. 5 Emmons&Olivier Resources, Inc. 651 Hale Avenue North Oakdale, Minnesota 55128