09-14-2020 Council Packet - Laserfiche WebLink

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Preliminary Plat Application Shoreline Estates Page 2 H:\ORNO\C13120357\z_Shoreline Estates\ShorelineEstates_PrePlatReview_2020-08-13.docx 2. Storm sewer sizing calculations must be submitted with correspond drainage area map to verify adequate sizing. 3. Final Plans must include the following: a. Grading, Drainage, and Erosion Control Plan b. Street Construction Plan c. Utility Plan d. Landscape and Restoration Plan (including invasive species removal) e. SWPPP meeting NPDES requirements 4. The applicant will be required to obtain Minnehaha Creek Watershed District (MCWD) approval and permitting. Per recent correspondence with MCWD, they will require all stormwater runoff management facilities to be installed with initial development. A copy of any approvals or permits required must be submitted prior to Final Plat approval. 5. The applicant will be required to obtain a General Construction Permit (NPDES) to discharge stormwater associated with construction activity since more than 1 acre will be disturbed. A copy of the permit must be submitted prior to any land disturbing activity. 6. The applicant will be required to obtain Hennepin County approval and permitting for connection to CSAH 15. A copy of any approvals or permits required must be submitted prior to Final Plat approval. 7. The applicant will be required to submit a Maintenance Agreement for all stormwater management structures and facilities. The agreement must define maintenance responsibilities following completion of project, specify types and frequencies of inspection and maintenance activities, designate who will conduct inspection and maintenance activities, and outline reporting requirements. 8. Drainage and Utility Easements msut be provided as follows: a. Over all sanitary forcemain. b. Over all stormwater management facilities used to meet regulatory requirements. c. Over all wetland and buffers. d. All swales and piping providing drainage for multiple properties. e. 5’ along all side lot lines, unless adjacent to Development boundary. f. 10’ along all front lot lines, rear lot lines, and adjacent to Development boundary. 9. Well locations must be indicated on the site plan to confirm adequate separation distance to septic facilities. 10. The 15” CMP under the entrance road must be replaced with a 15” RCP and existing drainage patterns maintained. 11. To better facilitate drainage, a rural street section should be considered at the entrance south of the storm sewer to the rain garden. Ditches do not need to be included. Due to the existing wetland on the west side and an existing culvert on the east, runoff will naturally drain away from the road. Otherwise, a curb cut must be installed at the low point with riprap to dissipate energy.