#08 - At Home Apartments Premin Plat & PUD

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PAGE 4 of 5 9. The storm sewer system shall be designed to maintain the city standard minimum pipe cover of 3.0 feet under all pavement surfaces, unless approved by the City Engineer. Drain tile is required as part of the city standard street section at all localized low points in the street. Drain tile considerations may impact the storm sewer design and depth requirements at low points. Drain tile inverts must be shown at all catch basin connection points. 10. The maximum curb run prior to a catch basin is 350 feet. 11. Storm sewer pipe located outside of the public right‐of‐way must maintain minimum 30‐ft easements centered over the pipe/structure without encroachments from buildings, footings, retaining walls, trees, or other permanent structures.  The site plans must be revised to remove all drainage and utility easement encroachments from the patios for Units 13‐18.  Additional easement area is required over CBMH 302A. 12. The street profiles must be revised to create low points on Street A and Street B immediately adjacent to Wildflower Drive to better facilitate the intersection drainage. The proposed valley gutters must be removed and the existing catch basins along Wildflower Drive relocated. An additional catch basin is required on Street A, between CBMH 302A and CBMH 302, to accommodate required drainage low point. 13. An additional catch basin is required in the cul‐de‐sac of Street B to improve the cul‐de‐sac drainage. 14. Revise all sump manholes to minimum 4‐foot depth per city and VBWD design standards. Label all sump manholes in profile view. 15. Remove all drain tile service stubs to each building. Drain til e service stubs are not permitted for connection to the street subdrainage system. 16. Offsite Topsoil Stockpile plan to be approved by Lake Elmo Public Works and Washington County. 17. The Grading and Erosion Control Plans must be prepared meeting all city design standards and plan format requirements, including the use of city standard plan notes, details and specifications. MUNICIPAL WATER SUPPLY 1. Municipal drinking water is available to the site with a connection to an existing 8‐inch watermain stub located along 39th Street North. 2. The developer will be responsible to extend municipal water into the development at the developer’s sole cost with the extension of an 8‐inch DIP watermain. 3. The watermain alignment must be revised at the intersection with Wildflower Drive to remove the proposed offset. The existing storm sewer and catch basins must be relocated to allow the watermain alignment to be adjusted accordingly. 4. No watermain oversizing is applicable for this development and the watermain does not need to be extended to serve adjacent properties or looped to connect at 39th Street. 5. The developer will be responsible to place hydrants and water system valves internal to the site as determined by the Lake Elmo Public Works Director and Fire Department. At a minimum, an additional gate valve must be installed along the easterly watermain extension to maintain the maximum number of services for isolation at 20 units. 6. The plans must be revised such that all water/sewer services are installed perpendicular to the main with no bends. When the use of bends is unavoidable, they must be located outside of the paved street. 7. The watermain construction Plans must be prepared meeting all city design standards and plan format requirements, including the use of city standard plan notes, details and specifications. MUNICIPAL SANITARY SEWER 1. The proposed site is located in the Old Village MUSA area in the city’s Comprehensive Plan and will discharge to the MCES Cottage Grove Ravine Interceptor. 2. Sanitary sewer service is available to the site with a connection to an existing 8‐inch sanitary sewer stub located along 39th Street North. 3. The developer will be responsible to extend sanitary sewer service into the development at the developer’s sole cost with the extension of an 8‐inch PVC sanitary sewer main.