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� � <br /> HUMER L. <br /> � CHASTAIl�T <br /> ` CX ASSOCIATES, LLP 5 N.COUNTRY CLUB ROAD Z1�-422_gs¢¢ <br /> CONSULTING ENGINEERS DECATUR,ILLINOIS 62521 FAX:217-422-0398 <br /> May 6, 2008 <br /> City of Decatur <br /> One Gary Anderson Plaza <br /> Decatur, Illinois 62523 <br /> Attention: Mr. Keith Alexander <br /> Re: Proposal for Lake Decatur Mining Plan <br /> Keith, <br /> Attached for your review and approval is the Lake Decatur Mining Plan. This <br /> work will consist of the following: <br /> • Hyrdrographic survey in detail of Basin 1 and 6. <br /> • Hydrographic survey of Basins 2, 3 and 4 (Basin 5 was completed in late <br /> 2007 in cooperation with ADM efforts for emergency water supply) The <br /> surveys of these basins will be made at locations similar to those <br /> perFormed by the Illinois State Water Surveys. <br /> • Mining plans created for Basins 1 and 6. The mining (grading) plan will be <br /> in the vicinity of Big Creek and Sand Creek areas which enter into Lake <br /> Decatur. <br /> This work will allow for computer files containing the mining plans to be loaded <br /> onto the City dredge and will allow dredging operations to create the proper <br /> contouring of the lake bottom in these areas to improve the usability of the lake in <br /> these areas, increase water capacity and create a more efficient hydraulic bottom <br /> to the lake. <br /> We will also design silt traps in these areas to capture incoming silt which will <br /> allow for more efficient dredging operations to occur in the future. We feel this is <br /> a best management practice for maintaining Lake Decatur and will reduce the <br /> cost for future dredging operations. This information will also be contained within <br /> the computer files loaded onto the dredge. I, <br /> This proposal is for the contract amount of$ 70,000. We will bill for these <br /> services on a monthly basis utilizing current schedule of rates identical to our <br /> current project for Lake Decatur. <br />