07/13/2016 P&Z Packet - Laserfiche WebLink

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Ms. Katie Larsen July 7, 2016 Page 4 SANITARY SEWER SYSTEM The sanitary sewer is less than 7 feet deep at SAN MH 8 and the City's standard is 7.5 feet deep. The applicant shall provide justification for not meeting standard. Associated watermain lowering shall be shown on the plans. Once additional information is provided we will review for conformance. 2. Sanitary sewer services need to be shown on the plans. Sanitary sewer services for Lots 3-7 Block 1 are of concern due to excessive length. These may require cleanouts or extending the main further into the loop providing more standard lengths. STORM SEWER SYSTEM 1. Please provide storm sewer calculations and drainage area maps with your construction plan submittal to verify the size of pipes and spacing of catch basins. 2. Several storm sewer pipe lengths do not currently meet the minimum 3 fps requirement. (CBMH 301-FES 300; FES 108-CBMH 107; FES 104-CBMH 103; CB 113-CBMH 112; CBMH 112-(ST/CB)MH 111; CB 204-(CB)MH 2O5; (CB)MH 205-CBMH 2O2; (ST/CB)MH 201-FES 200. 3. The storm sewer pipe between CBMH 301 and FES 300 shall be adjusted such that future maintenance would not encroach upon the adjacent private property. 4. Several structures are shown at or below minimum cover (CBMH 101; CBMH 114; CBMH 115; CB 204; CBMH 301; CBMH 302). Verify with the final construction plan submittal that all storm sewer pipe has a minimum 2 feet cover which includes the pipe thickness. TRANSPORTATION 1. A Traffic Study was prepared by SRF Consulting Group, dated May 9, 2016 and revised on June 23, 2016 addressing following comments: The analysis documented an issue with the backup of traffic southbound on Hodgson Road turning left onto Birch Street. It is indicated that this backup is more than 400 feet which will impact the southbound through traffic creating a potential safety concern with stopped traffic in the through lane. The Revised Study addressed the existing crash data. The Revised Study also discussed what effect signal timing improvements would have on intersection operations now and in the future with the proposed site traffic. The City should consider working with the applicant and Anoka County to review the options for the sign timing of this signal. In the "Neighborhood Impacts" section the traffic volume increases were updated using the actual estimates. The traffic volume figures were updated to show actual estimates; however, the anticipated change in the AM and PM peak hour volumes was not provided. This shall be included. S:\CommwityDevelopmmt\Projeas\Plwning Cases\St. Clair Estates\Staff Reports\20160713 PZ (continued Pl3)\2 20160707 Engineering Review No 2 St Clair