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Name: Corrin Wendell Date: November 19, 2022 Page: 2 H:\LTCANADA_CI_MN\0N1126113\1_Corres\B_From Others\Edgerton Development\2022-09-21 Preliminary Plans\Review Memo.docx • Included “Reviewed and Approved for Construction” signature line for City Engineer to memorialize the plans as approved. • Under Storm Sewer Notes: RCP is the only approved storm sewer material. • Under Watermain Notes: Copper Type K is the only approved water service material. Grading, Drainage, and ESC Plan (C1.1) • Grading and construction within Ramsey County right-of-way will require a Ramsey County right-of-way permit. Update these plans with any County requirements (retaining wall removal, guard rail removal, etc.) • Temporary and final stabilization methods are tabulated in the SWPPP on sheet C4.2 but are not depicted visually in sheet C1.1. Define the temporary and permanent erosion control and final stabilization methods. o Steep slopes 3:1 or greater should be vegetated with a low or no maintenance plant types. o The filtration basin detail and notes on sheet C3.6 have good information are a little open ended. • Provide silt fence at all downgradient locations around the development to prevent erosion from leaving the site (this pertains to the majority of the development perimeter) • Show individual tree locations along western plat boundary. Include notes in the grading plan to protect existing trees. • All retaining walls 4’ or greater in height will require a building permit and must be designed by a registered MN Professional Engineer. The retaining wall within Outlot A will be owned by the City – provide basic information in the final plans: (product type, approximate lateral reinforcement, a standard detail for wall construction showing free draining backfill, etc.). o Select a material/supplier from MnDOT’s prequalified list of Prefabricated Modular Block Wall (PMBW) suppliers. https://www.dot.state.mn.us/products/walls/pmbw.html ▪ Shop drawing and product submittals shall be reviewed and approved by the City Engineer. • The retaining wall along the proposal roadway will require a guardrail for vehicle fall-protection. The engineer certifying the retaining wall should include analysis for any loads received by the guardrail and possible negative effects to the retaining wall. • Retaining wall foundation will be subject to standing or frozen water in winter conditions. Include discussion in engineering review. ▪ Watermain and sanitary sewer will not be allowed within the retaining wall geogrid or reinforcement zone. o Retaining walls over 30” in height will require railings or fencing