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Page 1 of 2 <br /> <br />DATE: December 14, 2015 <br /> <br />TO: Honorable Mayor and City Councilmembers <br />Sue Iverson, Acting City Administrator <br /> <br />FROM: John Anderson, Acting Public Works Director <br /> <br />SUBJECT: Lift Station 11 Rehabilitation <br /> <br />Requested Action <br /> <br />Accept proposal from Bolton & Menk dated December 11, 2015, in the amount of $44,500 for <br />design and engineering construction services for the rehabilitation of Lift Station 11. <br /> <br />Background <br /> <br />The Public Works Department has been working to make our sanitary sewer lift station <br />operations more efficient and more reliable. Lift Station 11 is the last installation with a dry well <br />/ wet well design. This design has a wet well, where sewage is collected and a dry well where <br />pumps are located underground. Maintenance of the equipment requires staff to enter the dry <br />well and climb down to the elevation of the pump. Modern lift stations as installed though out <br />the rest of Arden Hills have a wet well with a submersible pump that is lifted to the surface for <br />maintenance. <br /> <br />Discussion <br /> <br />Lift Station 11 was built in 1970 and serves the Arden Manor manufactured home park, Scherer <br />Brothers Lumber and the northern portion of Round Lake Road. Rehabilitation of this lift station <br />has been a priority for Public Works for some time due to the high maintenance this station <br />requires. There is enough grade to eliminate the lift station with a very flat pipe running from <br />the lift station to the south end of Round Lake Road. An attempt was made along with the <br />County Road 96 construction in 2013 to lay the first segment of this gravity pipe. Unfortunately, <br />the soil conditions made it cost prohibitive to lay a pipe outlet for this lift station. The forcemain <br />which connects this lift station with the gravity sewer on Lakeshore Place was replaced with the <br />2013 reconstruction of County Road 96. <br /> <br />CONSENT ITEM – 6I <br /> <br /> <br />MEMORANDUM <br />