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Item No. 07B Meeting Date: February 22, 2016 Type of Business: Council Business City Administrator Review: ______ City of Mounds View Staff Report To: Honorable Mayor and City Council From: Brian Erickson, P.E., Director of Public Works /City Engineer Item Title/Subject: Resolution 8525, Approving Change Order with Hydro-Klean, LLC for Sanitary Sewer Lining Introduction On May 26, 2015, City Council approved a contract with Hydro-Klean, LLC for slip lining approximately 6,200 linear feet of various diameter sewer lines. By lining these sections of sewer, their remaining lifespan can be increased since the liner not only eliminates any ground water infiltration but adds structural strength to the lines. Resolution 8421 awarded the contract in the amount of $240,030.81 with a 4% construction contingency of $9,600.00 for a total amount not to exceed $249,630.81. Discussion During the course of construction, Hydro-Klean discovered a difficult area for lining on Pleasant View Drive due to a large area with ground water infiltration. The amount of ground water, if not addressed, would prevent the liner from curing properly and could have resulted in a failure similar to what occurred along Ardan Avenue and Groveland Road in 2015. As a result Change Order 1 (CO 1), in the amount of $5,930.00 was approved on September 24, 2015 for grouting five joints that were leaking. During the work approved in CO 1 four additional leaking joints were identified and requiring grouting. Because the work was in progress these joints were authorized to be added to the work. This resulted in an additional cost of $3,880.00 to the project. Ultimately, because of the ground water pressure in this area and the number of leaking joints, staff redirected Hydro-Klean to install the liner along the sanitary main on County Road I. Prior to installation, Hydro-Klean was required to clean, prepare and video the County Road I line. As they had already performed this work on Pleasant View, this resulted in an additional cost of $3,997.48 for the project. As a result, there is a need for Change Order 2 (CO 2) in the amount of $7,877.48. Currently, funding for this project is from the Sanitary Sewer Fund, 730-4823-7050. The amount authorized under Resolution 8421 was $249,630.81. This leaves a shortfall of $4,257.48, which would also come from the Sanitary Sewer Fund, 730-4823-7050. There is currently sufficient funding in the budget to cover this cost. The table on the following page summarizes the project costs and funding.