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Appendix C WaterCAD Model Results Scenario A: This models the current IRCDUS flow allocation (using data from December 2017 to November 2018. (Total flow allocation of 1.097 MGD: current 0.585 MGD flow to north barrier island, and available 0.512 MGD, diverted from the man made wetlands to JI): System A-1: p. EX -01 System A-2: p. EX -02 System A-3: p. EX -03 Scenario B: This models an estimated flow allocation for all current and potential future reuse customers within the IRCDUS service area and additional flow to the John's Island development. The basis of the flow allocation was estimated to be the sum of: the flow allocations of all developments with an existing SJRWMD CUP, plus an estimated flow allocation of 1.0 MGY per c of irrigated area for developments without a SJRWMD CUP, plus 1.0 MGD flow allocation for John's s a d development. (Total flow allocation of 2.964 MGD: estimated 1.964 MGD flow to north barrier islan co nities within IRCDUS service area, and an additional 1.0 MGD to JI): System B-1: p. EX -04 System B-2: p. EX -05 System B-3: p. EX -06 Scenario C: This models the same allocation into the COVB service area fo 3.116 MGD: estimated 1.964 M additional 1.0 MGD to JI, and System C-1: p. EX -07 System C-2: p. EX -08 System C-3: p. EX -09 Scenario D: This models the same estimated flow allocation as Scenario C, plus additional flow allocations into the COVB service area until the system failed. The purpose was to estimate the maximum capacity of the transmission and distribution system on the North barrier Island (Additional flows were incrementally increased in each version D-1, D-2 or D-3 below, until the system failed to deliver flows at adequate pressures. Failure was considered to be a pressure below the following: 10 psi at the top of the Wabasso bridge, 15 psi at the Sea Oaks tank, or 5 psi at Windsor). The total flow allocation varies per model below, and included an estimated 1.964 MGD flow to north barrier island communities within IRCDUS service area, additional 1.0 MGD to JI, an additional 0.153 MGD for the Shores and River Club, and additional flow allocation for the COVB service area determined below: location as Scenario 8, plus an additional flow a d River Club developments (Total flow allocation of barrier island communities within IRCDUS service area, MGD to COVB service area - the Shores and River Club): . System D-1: p. EX -10 System D-2: p. EX -11 System D-3: p. EX -12 *See pp. 6-9 for detailed explanation of systems A-1 to A-3, B-1 to B-3, C-1 to C-3, and D-1 to D-1, and see applicable graphics on pp. EX -01 to EX -12 in this appendix. 171 21