06/10/2020 P&Z Packet - Laserfiche WebLink

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Ms. Katie Larsen 06/03/2020 Page 4 The Stormwater Report shows the orifice outlet for OCS 1 as 4.8" and the plan shows 5". The OCS 1 detail on C2.14 of the final plat submittal does not match the HydroCAD model or the plan sheet for the orifice, top weir, or rim elevation. Please confirm the correct orifice diameter and the elevation of all three devices. The Water Reuse system will be supplemented by municipal water in low conditions: a. The applicant shall provide calculations demonstrating the amount of infiltration provided. Standard Rice Creek watershed district water reuse calculations nave been provided. The location of the re -use system pump and connection to city water shall be shown on the utility plan with backflow prevention. The mechanical engineer has been recently hired by the owner and this will be addressed as soon as possible. (AJA 2020-05.08) b. Provide an elevation (below the NWL) that the irrigation system will need to switch to City water during dry periods. The elevation has been labeled on the plan The applicant shall submit their allowable pump down elevation. Please identify where on the plan this is included. If a pond liner is being proposed please include information on the grading plan or other. Pond Liner information can be found on detail 11 on sheet C2.11. (AJA 2020- 05.08) Confirm the allowable pump down elevation. The stormwater reuse system design and details shall be submitted by June 19, 2020 for review prior to final plat approval. C. With the final design additional detail will be required and reviewed. This is noted The plan set shall show the storm sewer plan view and easement lines on the same page. This will allow the City to verify all storm and utility easements are correct. The plan sheets hare been modified Easements will be reviewed with the final design submittal. Noted. (AJA 2020-05.08) The applicant shall verify the manhole sizes/storm sewer layout for: a. CB 037, tight angle, consider storm sewer realignment. b. CB 004, tight angle, larger structure needed. C. CB 001, tight angle, larger structure needed. d. CB 101, tight angle, larger structure needed. e. CB 011, tight angle, larger structure needed. f. CB 013, tight angle, consider storm sewer realignment. g. CB 008, tight angle, larger structure needed. h. Additional CB's required between CB 1 & 2 at the road bend. Catch basin structures have been re -verified Storm sewer systems and catch basins will be reviewed with the final design submittal. Additional CB's will be required to maintain the storm sewer pipe within 2 feet from the road. Noted. (AJA 2020-05.08) Storm sewer shall have 15 feet of separation from a structure and include a 20' easement. The applicant should consider a utility and trail corridor between the private road and main road. (between Lots 10-11, Lots 11-12) Noted. (AJA 2020-05.08) Our review is based on the assumption that the senior living complex has a finished floor elevation of 910.5 and a 12 foot parking garage below. The ground water in this Lyngblomsten Preliminary Plat Engineering Review