2003-246 - Laserfiche WebLink

Home Browse Search

North County Brine Protect 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 North Relief Canal where it will ultimately flow into the Indian River Lagoon The first phase of the project will entail constructing four miles of 16" PVC pipe from the North County R. O . Facility to the Bent Pines Sedimentation Basin. Construction of the 16" concentrate brine line has been completed. The 16" concentrate main construction initiated at the North County R. O . Facility and proceeded south along Kings Highway two and one-half miles to 57`h Street then turned east for one and one-half miles to the sedimentation basin. The second phase of the project will involve plumbing the concentrate piping at the basin site such that brine can be either mixed with stormwater from the North Relief Canal, or discharged into the North Relief Canal during periods of low stormwater availability or low reuse demand . Stormwater will be conveyed from the North Relief Canal to the to the mechanical aerator mixing basin through a 24" diameter pipe. Energy will be provided through three (3) 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 three (3 ) 300 h.p . variable frequency drive pumps . The estimated construction costs are as follows : 16" Brine Line-21 , 120 L . F . $ 1 , 500 , 000 . 00 Wetlands Development $ 300 , 000 . 00 Pumping Station at North Relief Canal $ 500 , 000 . 00 Mechanical Aerator Mixing Basin $ 5002000 . 00 Pumping Station at 10 MG Basin Tailworks $ 500 , 000 . 00 CONSTRUCTION SUBTOTAL $ 3 , 3001000 . 00 15% Contingency $ 495 , 000 . 00 CONSTRUCTION TOTAL $ 3 , 795 , 000 . 00 Engineering , Permitting and Inspection (14 .6% Construction Subtotal) $ 554 , 070 . 00 PROJECT GRAND TOTAL $ 473491070.00