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MOUNDS Vi -V of Mounds View Staff Item No: 09H Meeting Date: August 14, 2017 Type of Business: Council Business Administrator Review: To: Honorable Mayor and City Council From: Don Peterson, Interim Public Works Director Michael Richie, Public Works Project Coordinator Item Title/Subject: Resolution 8809, Approving Additional Funding for the 2017 Sewer Rehabilitation Project Background: On June 12, 2017, the City Council approved Resolution 8764, approving a construction contract with Insituform Technologies USA, LLC., ("Insituform") for the 2017 Sewer Rehabilitation Project. The project will line approximately 4,189 feet of sanitary sewer and 133 feet of storm sewer throughout Mounds View. Discussion: Public Works staff completed additional investigation of sanitary sewer pipe while the 2017 Sewer Rehabilitation Project was in the process of going out for bid. During the additional investigation and cleaning, Public Works staff observed a break in the sanitary sewer pipe under Greenfield Avenue between Woodale Drive and O'Connell Drive as well as under Silver Lake Road between Woodcrest and County Road H. Staff also observed excessive infiltration into the sanitary sewer under Sherwood Road between Groveland Drive and Red Oak Drive. As a result, and after the project was awarded to Insituform, staff discussed the possibility of adding these sections of sanitary main to the 2017 sewer rehabilitation project. Doing so would reduce the potential for future emergency repairs and groundwater infiltration. Since Insituform has not started the project, they agreed to the additional sewer lining. They also stated they would maintain their unit prices for the additional 1,078 feet of 8" liner and 326 feet of 10" liner. The awarded unit price for this work is $26.20 per linear foot of 8" liner and $30.80 per linear foot of 10" liner. This would result in an additional cost of $43,293.00. The current contract amount is $128,943.30. The 2017 Sanitary Sewer Fund (730-4823-7050) includes $150,000 for sewer lining and $25,000 in the Storm Sewer Enterprise Fund (745-4415-5150) for this work. The existing contingency of $12,900 (20%) will be reduced to $2,760 (2.1%). The table below details the changes proposed by the additional work. 2017 Sewer Rehabilitation Project Amount 2017 Budget Sanitary Sewer Fund Budget 150,000.00 Storm Sewer Fund Budget 25,000.00 Original Contract Amount 128,943.30 $ 175,000.00 Revised Contingency (2.1%) 1 $ 2,760.00 Additional Sewer Lining 43,293.00 New Total Amount 174,996.00