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� � " • , . <br /> Engineering & Infrastructure Memorandum <br /> NO. 2009-04 <br /> DATE: January 9, 2009 <br /> TO: Honorable Mayor Carrigan and City Cou cil <br /> FROM: Ryan P. McCrady, City Manager � ,, <br /> Richard G. Marley, P.E., Director of Engineering& as ructure ^ � <br /> SUBJECT: Lake Decatur Dam Repairs, City Project 09-02 <br /> SUMMARY RECOMMENDATION: It is recommended by staffthat the City Council approve <br /> the attached resolution authorizing an agreement with Hanson Professional Services, Inc., (Hanson), <br /> to provide engineering services to develop designs and construction documents for repairs to the <br /> Lake Decatur Dam for a fee not to exceed $83,400. <br /> BACKGROUND• <br /> Prior Council Action <br /> November 6, 2000—Council approved Resolution R2000-220 approving an agreement with Harza <br /> Engineering Company for the design of Lake Decatur Dam Phase II Improvements, City Project <br /> 2000-41, in the amount of$48,900. • <br /> September 17, 2001 —Council approved Resolution R2001-176 awarding a contract to OCCI, Inc. <br /> to perform the Lake Decatur Dam Rehabilitation, City Project 2000-28A in the amount of$542,370. <br /> September 20, 2004—Council approved Resolution R2004-140 authorizing an agreement with <br /> Hanson Professional Services for design of the Lake Decatur Dam Rehabilitation Project 2004 <br /> Upstream Face of Spillway, City Project 04-20, in the amount of$40,000. <br /> May 16, 2005—Council approved Resolution R2005-60 awarding an amendment to the agreement <br /> with Hanson Professional Services for the design of the Lake Decatur Dam Rehabilitation Project <br /> 2004 Upstream Face of Spillway in the amount of$27,300 bringing the total agreement amount to <br /> $67,300. <br /> May 16, 2005—Council approved Resolution R2005-61 awarding a contract to J. F. Brennan to <br /> perform the Lake Decatur Dam Rehabilitation Project 2004 Upstream Face of Spillway in the <br /> amount of$167,675. <br /> Summary of Major Construction History of Lake Decatur Dam <br /> The City owns and operates the Lake Decatur Dam located on the Sangamon River just west of <br /> Business Route U.S. 51. Built in 1922, the dam provides an impoundment for the City's source of <br /> drinking water. In 1955 bascule gates were added to the concrete spillway to increase the lake level <br /> Page � 1 <br />