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a . Main Relief Canal : Eastern limits = 400 feet east of the proposed <br /> tilting weir structure or 50 feet west of the railroad bridge , whichever is <br /> the shortest distance . Western Limits = 50 feet east of the spillway . <br /> b . South Relief Canal : Eastern Limits = 400 feet east of the proposed <br /> tilting weir structure . Western Limits = the Old Dixie Highway Bridge . <br /> ( Indian River County has existing survey information in the vicinity of <br /> the Old Dixie Highway Bridge , and the COUNTY will provide this <br /> information to the ENGINEER . ) <br /> c . North Relief Canal β€” Eastern Limits = 50 feet west of the U . S . <br /> Highway No . 1 bridge . Western Limits = 50 feet east of the Old Dixie <br /> Highway bridge . <br /> 9 . Existing Planimetric Features β€” Locate and identify all visible , above <br /> ground physical features and objects within the Limits of Survey , and show <br /> this information on the Topography Drawings . Planimetric features include , <br /> but are not limited to : existing and established Survey Control , pavement , dirt <br /> trails or roads , driveways , sidewalks , curbs , bridges , structures , valve boxes , <br /> hydrants , poles , towers , overhead wires , manholes , mailboxes , fences , <br /> plantings , drainage structures , water bodies , edge of wooded areas , trees 3,, <br /> inches or larger in diameter within the canal right-of-ways (and identify the <br /> size (diameter) and species of each tree ) , signs , etc . Also , show the <br /> extension of the centerline of the City Municipal Airport' s runway on the plan <br /> view . <br /> D . ENGINEERING SERVICES β€”The design team shall provide the following services <br /> so that the Work described herein can be permitted by applicable federal , state , and <br /> local regulatory agencies , properly bid by the COUNTY , and constructed by a <br /> Contractor selected by the COUNTY : <br /> 1 . Final Engineering Design and Calculations β€” The design team shall <br /> design a pollution control system for ( 1 ) the Main Relief Canal , (2 ) the South <br /> Relief Canal , and ( 3 ) the North Relief Canal as discussed and recommended <br /> in the approved Preliminary Engineering Report . In general , each pollution <br /> control system shall include a floating boom system , three or more climber <br /> screens , and two or more vortex units . The floating boom system directs <br /> floating debris in the canal to the climber screens . The canal water will flow <br /> through the climber screens into an animal removal chamber, and then into a <br /> main channel that routes the canal water into the vortex treatment units . <br /> Design the floating boom to rise and fall with the canal water level . Canal <br /> water level shall be regulated by a tilting weir. Design the tilting weir to <br /> provide the necessary operational head for optimum operation of the vortex <br /> units throughout their design flow range . Design the entire system for <br /> continuous and automatic operation . <br /> FAPublic Works\KeithM\Stormwater ProjectsTast IRC\Contracts\Consultant Contract with Carter & Associates\Work Order No. 5 - Final Design <br /> of Vortex System\Work Order #5 - Rev. May 3, 2004.doc <br /> 5 <br />