R2013-74 ACCEPTING THE BID AND AUTHORIZING CONTRACT FOR LAKE DECATUR DAM REPAIRS

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Public Works Memorandum NO. 2013-36 DATE: July 8, 2013 TO: Honorable Mayor McElroy and City Council Members FROM: Ryan P. McCrady, City Manager Richard G. Marley, P.E., Public Works Director Keith D.Alexander, Director of Water Management SUBJECT: Resolution Accepting the Bid and Authorizing the Execution of a Contract for Lake Decatur Dam Repairs Project- Phase II, City Project 2012-25 SUMMARY RECOMMENDATION: It is recommended by staff that the City Council approve the attached resolution accepting the bid and awarding the contract for the Lake Decatur Dam Repairs Project—Phase 11, City Project 2012-25,to Engineering & Construction Innovations, Inc., as the lowest responsible bidder in the amount of $4,159,573.00, and that the Mayor be authorized to execute the contract, and the City Clerk to attest. PRIOR COUNCIL ACTION: See Appendix A for Prior Council Action BACKGROUND: Summary of the Major Construction History of Lake Decatur Dam Appendix B provides a brief summary of past improvements to the Lake Decatur Dam. Phase I of the Lake Decatur Dam Repairs Phase I of the Lake Decatur Dam Repairs project began in June 2010 and was completed in 2011. The project included the following work: 1. Concrete repairs to the upstream face of the dam 2. Rehabilitation of the mechanical systems that raise and lower the sluice gates on the north side of the dam. 3. Replacing the seal systems for the bascule gates and sluice gates. 4. Removal of gate heaters along the bascule gates. 5. Installation of a concrete test patch on the downstream spillway of the dam to help determine a repair approach for Phase 11 work. 6. Replacement of all eight cylinders operating the bascule gates of the dam. Phase II of the Lake Decatur Dam Repairs Phase II of the Lake Decatur Dam Repair project includes the following work: 1. Complete partial depth concrete repairs to the downstream face of the dam This is a major work item that will be a continuation of a test patch that was completed with the Phase I work in 2010-2011. The test patch completed during the Phase I work performed well during the Page 11