09-25-2013 Council Agenda - Laserfiche WebLink

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• Construct boulevard rain gardens to reduce the amount of runoff and improve it's quality prior to discharge. 3.47 Drainage Area 8 — 1.80 Acres Drainage Area 8 represents the portions of Sunrise Drive near its intersection with Edgerton Street. Runoff in this area will continue to flow east through a series of existing pipes along Edgerton Street, ultimately discharging into the pond at the northeast corner of Edgerton Street and County Road B. The following improvements are proposed within Drainage area 8. • Close off access to Edgerton Street at Sunrise Drive and remove connecting paved areas. Removing this pavement and replacing it with turf grass will reduce the amount of runoff. • Extend storm sewer piping and catch basins to low -point on Sunrise Drive to maintain drainage. • Construct boulevard rain gardens and bio- filtration basins to reduce the amount of runoff and improve it's quality prior to discharge. 3.5 Watermain At this time, Saint Paul Regional Water Services (SPRWS) has identified approximately 9,700 feet of watermain replacement. Likewise, approximately 1,000 lineal feet of watermain extension is proposed along Burr Street and Highway Drive to provide service to the 14 properties currently on wells. These properties include 2203, 2209, 2214, 2221, 2222, 2225, 2228, 2231, 2238, 2239, 2244, 2245, 2250 Burr Street as well as 480 Highway Drive. It is proposed that these properties on Burr Street and Highway Drive be assessed at the 2013 rates for a water service with new main as well as the water service cash connection charge. Assessing properties for these fees allows for them to be paid for over time versus a lump sum payment. Property owners will have the option to defer this watermain assessment until they connect to the new service. The watermain work discussed above would be done under the proposed project contract and the cost associated with this work would be reimbursed to the city by SPRWS. Maplewood will only be responsible for water system expenses that are directly the result of the street construction. 3.6 Sanitary Sewer Information included in the report is based on televising and manhole inspection performed by the City's sanitary sewer division. Based on the information available about the system a significant amount of root intrusion is present in the project area. This root intrusion has resulted in a large amount of cracked and broken pipes. Approximately 4,100 feet of sewer main is in need of lining to improve the structural capability of the pipe walls and to discourage future root intrusion. Along with the lining improvements, a number of sanitary manholes have deteriorated and are in need of reconstruction. These improvements have been included in the estimate in this report. Residents have been asked, as part of the survey questionnaire, if they have experienced any sanitary sewer service problems. Residents who provided information on sewer problems will be contacted to determine if there is pipe damage or blockage and where that problem lies with respect to the road right -of -way. Any damaged sanitary sewer main and services within the road right -of -way will be repaired as part of the street reconstruction. This work would be performed as part of the overall project with repair costs recovered by the sewer utility fund. Staff has estimated based on past projects and interest in this sewer service program the amount of anticipated sewer service repairs. 18 28