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c <br /> Contract S17611 <br /> Amendment #2 <br /> EXHIBIT A = 3 <br /> Note : All costs and timeframes listed below are preliminary estimates and are therefore, subject to change . The County <br /> will bid all projects and <br /> provide construction manage ent services . <br /> Project Description/ Estimated Timeframes <br /> Project Name Location Tasks Cost Start I Complete <br /> A . PART A — PROJECTS WITHIN THE MAIN AND SOUTH RELIEF CANAL BASINS <br /> Project No. A - 1 : Modify the Main Relief Canal east of 43rd The existing radial arm gate <br /> existing radial arm gate Avenue structure consists of three discrete <br /> structure at the Main Relief radial arm gates . The middle radial <br /> Canal arm gate is set approximately one - <br /> foot below the other two gates and <br /> 3 <br /> serves as an overflow weir. When <br /> �� <br /> the radial arm gates are opened , $ '" <br /> settled solids immediately upstream , <br /> of the gate are re-suspended and <br /> 1,„ +a <br /> discharged into the Indian River 44444 <br /> Lagoon . This project will replace <br /> one of the radial arm gates with a ' . .. <br /> raw, <br /> tilting-type weir gate . Purpose: ( 1 ) <br /> to provide more accurate water `° ' <br /> level control, (2) to allow more <br /> water to be retained upstream of the <br /> structure , and (3 ) to minimize ' <br /> release of settled solids when the <br /> water level is lowered . <br /> Design and Permitting $ 169271 5/ 15/2003 complete <br /> Land Acquisition ( 1 ) N/A N/A <br /> Construction 1 8 10/ 10 0 <br /> ', <br /> �, � <br /> ons ruc io <br /> . ,IqA <br /> 7777 <br /> 101 N11 <br /> Page 3 of 9 <br />