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INDIAN RIVER COUNTY <br />PUBLIC WORKS DEPARTMENT <br />STORMWATER DIVISION <br />1801 27th STREET <br />VERO BEACH, FLORIDA 32960 <br />Phone: (772) 226-1562 <br />CONSENT <br />TO: Joseph A. Baird, County Administrator <br />THROUGH- Christopher R. Mora, P E , Public Works Director CI' <br />FROM: W. Keith McCully, P E , Stormwater Engineer S <br />SUBJECT: APPROVAL OF WORK ORDER NO. PCM -2 FOR SEDIMENT <br />REMOVAL AT PC MAIN SCREENING FACILITY <br />DATE: December 20, 2013 <br />DESCRIPTION AND CONDITIONS <br />The purpose of this Agenda Item is to request the Board of County Commissioners <br />(Board) approve Work Order No. PCM -2 with EMC Divers, Inc. for sediment removal <br />from the PC Main Screening Facility s sediment traps. PC Main is located in the Indian <br />River Farms Water Control District's Main Relief Canal north of the County <br />Administration building complex. On April 23, 2013 the Board approved the Master <br />Agreement for this work and this is the second Work Order under the Master <br />Agreement. Collectively, the facility's two sedimentation traps hold approximately 148 <br />cubic yards of sediment, equal to about eight 18 -cubic yard dump trucks. Nitrogen and <br />phosphorus are associated with many of the settable solids. Based on laboratory <br />analysis, each sedimentation cell cleaning cycle (both cells cleaned) removes <br />approximately 141 pounds of total nitrogen and 49 pounds of total phosphorus from the <br />canal. These removals equal 35.25 and 24 50 forty -pound bags of 10-5-10 (N -P -K) <br />fertilizer for total nitrogen and total phosphorus, respectfully. <br />The cost of this Work Order is $7,100.00. <br />F:\Pubhc Works\KeithM\Stormwater Projects\Main Relief Canal Operation\Dredging Sedimentation Basins\Agenda Items\Agenda - <br />Consent - Work Order #PCM -2 - 12-17-2013.doc <br />z‘b <br />18 <br />