6A, 2011 PMP - Public Hearing and Resolution 2010-080

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+ Arden View Drive EntlExii, from Hamline Avenue to Arden View Court, • Colleen Court, from Colleen Avenne io cul-de-sac, • Dellwood Street, froxn Nursery Hill Court to Ambie Road, • Janet Court, fram La�ce Valentine Road to cul-de-sac, • Niirsery Hill Caurt, from Nursery Hill Lane to cul-de-sac, • Nursery Hil1 Lane, from Hamline Avenue to Nursery Hill Court, • Wyncrest Court, from Hamline Avenue to cul-de-sac, • Wyncrest Lane, from Wyncrest Co�art to Wynridge Drive, • Wynridge Drive, from Wyncrest Court to cul-de-sac. Storm Draina�e and Stor�n Water Qualitv Improvements: The storm drainage system improvements are relatively minor and include maintenance on selected stonn sewer manholes and catch basins. At the September 23, 2010 neighborhood meeting, residents adjacent to Karth Lake asked if improvements to the existing storm drainage system could be made in conjunction with the overall project that wiIl help improve the quali#y of the water entering Karth Lake. City stafi discussed the possibility of installing grit chambers and iniiltration facilities (rain gardens) that r�vould im.prove water quality. In between 1255 and 1261 Nursery Hill Lane, the City's storm sewer syste� discharges into Karth Lake. During final design, the City wiIl evaluate alternatives to the existing storm sewer system that would result in an improvement to the water quality in this area. Water System Improvements: The water system improvements include removing and replacing selected gate valves and hydrants that are in poar condition. Since the Arden View neighborhood has experienced a number of watermain breaks, the existing watermain system within ihe City's roadways are proposed to be removed and replaced. Water system improvements in the Arden View neighborhood will include all associated valves and hydrants near the roadway areas. Sanitar Sewer S stern Im roverrients: The sanitary sewer system improvements are relativeIy minor and incl�de rnaintenance on selected manholes. However, wiihin the 7anet Court cul-de-sac, City staff is proposing that a segment of the existing sanitary sewer pipe be removed and repIaced to eliminate a sagging pipe. Financial Imnlications The estimaied total project cost far the improvements is $1,703,740 which includes aIl overhead costs. Consistent with the City's Assessment Policy, 37% overhead costs for the street improvements has been included, which was used to calculate preliminary assessment rates. The overhead is bralcen down as follows: City Administration 2.5°/o Design Engineering 10.0% Construction Engineering 10.0% City Council Meeting 11Metro-inet.uslardenhil�slPR&PWIEngineeringlCouncil Actions120I0112-13-lOMemo_2011PMP_PH OrderPlansSpecs.doc Page 2 of 4