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North County Brine Project Description The main purpose of the North County Brine Project will be to redirect the R. O . demineralization concentrate from directly discharging to the Indian River Lagoon and utilize as a resource to mix with stormwater at a sedimentation basin . The mixture of stormwater/concentrate will be sold to golf courses in the form of reclaimed water to help supplement irrigation. The portion of stormwater/concentrate not utilized for irrigation will be routed through the sedimentation basin and discharged into the Lateral "G" Canal where it will eventually flow into the North Relief Canal and ultimately, into the Indian River Lagoon A tilt-gate control structure will be installed west of the Lateral "G" canal. This will provide adequate water volume in the North Relief Canal needed to dilute the concentrate to tolerable levels for vegetation irrigation. The brine will be redirected by constructing four miles of 16" PVC pipe from the North County R. O . Facility to the Bent Pines Sedimentation Basin . The 16" concentrate main construction will initiate at the North County R. O . Facility and proceed south along Kings Highway two and one- half miles to 57 h Street then turn east for one and one-half miles to the sedimentation basin. The concentrate piping will be plumbed at the basin site such that brine can be either mixed with stormwater from the North Relief Canal, or discharged into the Lateral "G" Canal during periods of low stormwater availability or low reuse demand. Stormwater will be conveyed from the North Relief Canal to the 8 million gallon lake through a 24" diameter pipe. Energy will be provided through three (3 ) 300 h.p . vertical turbine pumps installed in the North Relief Canal . Stormwater will be further conveyed from the 8 million gallon lake to the concentrate mixing "T" through another 24" diameter pipe. Energy will be provided through three (3) additional 300 h.p . vertical turbine pumps . The concentrate/stormwater mixture will be routed through the 10 million gallon sedimentation basin where it will undergo additional mixing and natural attenuation. The mixture will be extracted at the end of the sedimentation basin and pumped into the reuse system with (3) three 300 h .p . variable frequency drive pumps . The estimated construction costs are as follows : 16" Brine Line-21 , 120 L. F . $ 11 500, 000 . 00 Control Structure W/O Lateral G Canal $ 3009000 . 00 Pumping Station at 8 MG Lake Headworks $ 500, 000 . 00 Pumping Station at 8 MG Lake Tailworks $ 5000000 . 00 Pumping Station at 10 MG Basin Tailworks $ 500 , 000 . 00 CONSTRUCTION SUBTOTAL $ 31300 , 000 . 00 15% Contingency $ 495 , 000 . 00 CONSTRUCTION TOTAL $ 397959000 . 00 Engineering , Permitting and Inspection (14 .6% Construction Subtotal) $ 554 ,070 . 00 PROJECT GRAND TOTAL $ 413499070.00