12/10/2025 PZ Combined Packet - Laserfiche WebLink

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Ms. Katie Larsen 12/03/2025 Page 6 27. WSB (12/3/2025) Drainage Area 2.1S should be routed to the trunk storm sewer and included in the gate closed HWL analysis to maximize area included in the CSMP system. A grate inlet at STM-103 may allow storage to be shared with Pond 1 for additional flexibility. Runoff from 20S can be routed around using a ditch into the dual culvert crossing of Street G. 28. WSB (12/3/2025) Wetland 4 outlet should be rerouted south into Pond 1 and included in the gate closed HWL analysis to maximize area included in the CSMP system. Connecting into STM-136 appears feasible with some minor adjustments to storm sewer inverts. The overflow to the north can remain as-is. 29. WSB (12/3/2025) How will Wetland 14 culverts work? The 1’ pipe is only 0.6’ below the trail elevation. Will the trail be paved or otherwise stabilized at overflow to prevent erosion? 30. WSB (12/3/2025) The outlet pipe for Pond 1 should be set at 887 or lower to ensure it can still function as a skimmer when the pond is drawn down to 889 for irrigation reuse. 31. WSB (12/3/2025) The outlet grate for Wetland 5 should be modeled at 900.5 to match the OLE stated on the plans. 32. WSB (12/3/2025) Provide vertical separation between STM-302 to STM-301 pipe and sanitary sewer below it. 33. WSB (12/3/2025) Recommend routing STM-101 to STM-121 to consolidate pond outfalls, if feasible. • Water Supply The City’s water supply system well firm capacity should meet or exceed its maximum day demand. This criteria is currently constrained by poor water quality in some wells, the White Bear Lake court orders and ongoing litigation, and annual variability in water use due to drought and other factors. The City’s existing firm capacity (excluding Well No. 2 due to poor water quality) is 4.38 million gallons per day (MGD). The City’s maximum day demand from 2015 to 2024 was 3.87 MGD. Near-term development within the City is projected to increase the maximum day demand by 0.42 MGD, bringing it to 4.29 MGD. The City is actively pursuing Well No. 7 to increase firm capacity, but it will likely not be in service until the fall of 2026. Based on the wide annual variability in maximum day demand and its susceptibility to drought conditions, the City will continue to monitor water demands and reserves the right to impose water restrictions and to reevaluate water supply capacity prior to Peltier Phases 3 and 4. The City has begun conversations with the Minnesota Department of Natural Resources (DNR) about permitting Well No. 7 and is awaiting confirmation whether it can be constructed at this time given the ongoing White Bear Lake litigation. Applicant to verify water pressure is adequate for all locations within the development. The watermain will need to be looped through the site and will need to include a 12-inch diameter trunk watermain stubbed to the north as identified in the Comprehensive Plan. All proposed units are required to be on the municipal water supply. Peltier Ponds Development - Engineering Review