2010-252A (19) - Laserfiche WebLink

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Comprehensive Plan Potable Water Sub-Element Community Development Department Indian River County 24 Table 3.B.7 Pros and Cons Associated with Alternative Water Supplies Surficial aquifer Seawater/Boulder Zone Desalination Fresh Surface Water/Reservoirs Use of UFA • Water is • Unlimited water Available availability • Potentially lower cost than current water Treatment Technology • No anticipated impact on agricultural wells in the UFA Pros • Fresh surface water resources are abundant particularly at the boundary between the Upper Basin project and C-25 canal • O&M costs are the lowest of all technologies • Deep injection well not necessary • Fellsmere Water Management Area (WMA) slated for development • Groundwater is available • Ability to meet immediate and short term demands • Same treatment technology as currently in place • Costs are similar to existing costs • Add on to existing treatment plants • A secure source • Potential interference with existing agricultural wells • Deep injection well for disposal of concentrate • Extension of well sites over greater distances to minimize drawdown impacts increases pipeline costs • Most expensive membrane treatment technology- energy intensive • Different membrane treatment technology • Deep injection well for disposal • If Boulder Zone is the source, then a study would be necessary to show feasibility • Potentially a secure source if groundwater is the source; surface water source would be less secure • Different membrane treatment technology • Approximately 20 miles of pipeline required • Safe yields of the St. Johns River and Upper Basin project have not yet been determined – minimum flows and levels in the St. Johns River must be met. • Operational guidelines for the water conservation areas will be a constraint on available supply • Timing of construction of Fellsmere WMA not determined • Reconnection of the C- 25 canal and the Upper Basin project is still in the discussion stage. • Source water will require protection Cons • Different Membrane Treatment Technology • Deep injection well for disposal of brine • Production rates are low requiring a large number of wells • Land acquisition of large number of well sites • Potential Wellfield Protection issues because of shallowness of wells – will Require Protection • Variable water Quality • High maintenance • Potential impact on adjacent homeowner wells