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�� <br />�R�N�HILLS <br />MEMORANDUM <br />DATE: January 30, 2012 <br />TO: Honorable Mayor and City Councilmembers <br />Patrick Klaers, City Administrator <br />FROM: Kristine Giga, Civil Engineer /�� <br />SUBJECT: 2011 Sanitary Sewer Lining Project- Payment #2 and Final <br />Back�round <br />The City of Arden Hills awarded Insituform Technologies, USA, Inc. of Chesterfield, <br />Missouri, the 2011 Sanitary Sewer Lining Project on March 28, 2011, for a total contract <br />amount of $399,444.50. <br />The project has been completed in accordance with the plans and specifications. <br />Financial Implications <br />The final contract amount, $386,730.20, is $12,714.30 less than the awarded amount of <br />$399,444.50. This represents a decrease in the contract of 3.2%. The cost decrease is the <br />result of the actual quantities being lower than estimated quantities. There are a few <br />factors that resulted in these decreased quantities: <br />• One segment of pipe on New Brighton Road was not lined, because the upstream <br />manhole is not a full sized manhole that allowed adequate access. There is only <br />one service off of this line, therefore the Public Works crews felt this line could <br />be monitored and addressed at a future time if needed. <br />• The configuration of the sanitary sewer and manhole locations on the Land O' <br />Lakes property is different than what is shown on original construction plans, and <br />some of the pipe sizes are smaller than records indicated. <br />• Throughout the project area, some of the pipe segments were different lengths <br />than records indicated. Overall, the total pipe length was shorter than estimated. <br />The City's records will be updated to reflect the corrected information gathered in the <br />field with this project. <br />City Council Meeting <br />\�1VIetro-inet.us\ardenhills�PR&PW\Engineering\Council Actions�2012\1-30-12Memo_2011SewerLiningPayment2-Final.doc <br />Page 1 of 2 <br />