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INDIAN RIVER COUNTY <br />South County WWTP Expansion <br />Alternate No. 2 <br />Relocate Future Aeration Basin to Wetland/Stormwater Area <br />■ Maximizes the use of existing plant tankage. <br />■ Minor impact on future plant hydraulics. <br />Additional Cost <br />■ Operation and maintenance costs minimized. <br />■ Additional piping required. <br />$25,000 <br />■ County cut/fill balance requirement not met (violation of County P&Z requirement). <br />■ Saves Oak Hammock. <br />■ Impacts more wetland area, additional mitigation required. <br />50,000 <br />■ Foundation questionable, removal of muck required. <br />200,000 <br />■ Increased liability for removal of access road for service/sludge hauling. <br />■ Delays construction of this phase. <br />1,000 <br />■ Additional engineering/permitting required. <br />OLW <br />TOTAL ADDITIONAL COST <br />$306,000 <br />Comment: This alternate was not pursued due to wetland impacts and permitting difficulties with <br />FDEP/ACOEISJRWMD. County cut/fill balance requirements cannot be met. Foundation in wetland <br />area is unknown and would require further investigation. <br />• Costs include County/FDEP/ACOS/SJRWMD mitigation impacts. <br />INDIAN RIVER COUNTY <br />South County W WTP Expansion <br />Alternate No. 3 - Relocate Future Headworks and Aeration Basin <br />■ Maximizes the use of existing plant tankage. Additional Cos <br />■ Impacts future plant hydraulics. <br />a Operation and maintenance costs minimized. <br />■ Existing raw sewage pipelines relocation and abandonment. <br />$250,000 <br />■ Relocating of existing pump station and piping. <br />150,000 <br />■ County cut/fill balance requirements met. <br />■ Saves Oak Hammock. <br />■ Foundation investigation required. <br />■ Increased liability for removal of access road for service/sludge hauling. <br />1,000 <br />■ Delays construction of this phase. <br />■ Additional engineering/permitting required. so <br />TOTAL ADDITIONAL COST $451,000 <br />Comment: This alternate was not pursued because of the uMust cost to utility customer and the <br />possibility of FDEP/ACOEISJRWMD claiming the area east of percolation ponds as a wetland. Requires <br />relocation of existing raw sewage pipelines and pump station. <br />DECEMBER 17, 1996 90 (C) <br />