06/14/2004 Council Packet - Laserfiche WebLink

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2.7.3 Alternatives Eliminating the use of underground storm water chambers for infiltration and increasing pond sizes to offset the loss of infiltration was considered. This approach was rejected because it would not meet infiltration criteria required by Rice Creek Watershed District and would result in a significant reduction of land available for development. Installation of a single system to serve the entire development was considered. This approach was rejected because infiltration would become more difficult, pipe sizes and corresponding costs would increase significantly, and staging of development for the entire site would be virtually eliminated. The use of multiple drainage systems will allow overall development to be divided into smaller, more manageable phases. 2.8 Sanitary Sewer 2.8.1 Existing Conditions Sanitary sewer was extended in Town Center Parkway and Village Drive when Phases I and II of the Village development was constructed in 1997 and 1998. A 12 -inch PVC gravity sewer exists in Town Center Parkway from Lake Drive to the end of the existing roadway. A 12 -inch PVC gravity sewer also exists in Village Drive from Town Center Parkway to the end of the existing roadway. Both sewer mains are in very good condition. 2.8.2 Proposed Improvements A 10 -inch PVC gravity sewer will be extended northerly in Town Center Parkway from the end of the existing 12 -inch main to the southeast corner of the new City park. This run of sewer is approximately 400 feet in length. An 8 -inch stub will be provided to serve Block 1 of the proposed development. A 10 -inch PVC gravity sewer will be extended northerly in Village Drive from the end of the existing main to Woods Edge Boulevard on the north side of the City park, then easterly in Woods Edge Boulevard to the proposed roundabout. A 10 -inch main will be extended easterly from this point to the entrance to the YMCA facility. The length of this sewer run is approximately 1200 feet. An 8 -inch PVC gravity sewer will be extended northeasterly in Town Center Parkway from the roundabout to the intersection with Woods Edge Boulevard. The length of this run of sewer is approximately 950 feet. An 8 -inch PVC gravity sewer will be extended easterly in Woods Edge Boulevard from the YMCA entrance to the southeasterly corner of Outlot A and then northerly into Outlot A. A second 8 -inch PVC gravity main will also be extended into Outlot A. Total length of these two sewer runs is approximately 1000 feet. Eight -inch sewer stubs will be installed at multiple locations for Blocks 1, 2, and 3. Some of these stubs will be connected to existing sewers in Town Center Parkway and Village Drive. Existing and proposed sanitary sewers are shown in Figure 10. Feasibility Report A- LINOL0305.02 City of Lino Lakes Page 9