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27 <br /> Slide#5 <br /> Our Expanded Quarry Reservoir and Jordan Lake Meet our Long-Term Water <br /> Supply Needs and Address Drought Vulnerability <br /> 20 <br /> Jordan Lake Allocation Included <br /> 18 <br /> 16 <br /> Water <br /> m <br /> E 14 Expanded Quarry Reservoir <br /> su <br /> pply v 12 <br /> E Yield Also has Uncertainty <br /> l 10 ♦� <br /> Yield 6 ♦♦� ♦gyp♦ • <br /> m ♦♦► Actual <br /> Demands •�M♦�yM♦� Baseline,tst and 99th <br /> 3 6 ♦♦» Percentile Projections <br /> ♦♦N <br /> OC 4 <br /> 2 <br /> 0 — <br /> 1980 1990 2000 2010 2020 2030 2040 2050 2060 2070 <br /> FiscalYear <br /> O WASA's Water Supply Yreld and Demands-The estimated yield that includes our allocation of water from <br /> Jordan Lake is oversimplified as our access through the Western Intake Partners has notyet been modeled <br /> with our three local supplies. The projections shown in the figure are from 2019.In addition,there is <br /> uncertainty in the yield which is more difficult to quantify Shan the demand projections. <br /> Toddy Taylor said projections showed that current reservoirs plus quarry expansion would <br /> provide water supply decades into the future before requiring regular Jordan Lake use. <br /> Commissioner Bedford asked about quarry transition timing. <br /> Todd Taylor explained mining would cease in 2030, and the following five years will be <br /> spent connecting pits and filling them with water. He said that some capacity will be temporarily <br /> offline during this period. <br /> Commissioner Bedford asked if the 575 days of supply is the current capacity or future. <br /> Todd Taylor said that it represents the current capacity of the quarry. <br /> Slide #6 <br /> Y � <br /> Joness •.iIJ �.rr <br /> r- <br /> IN <br /> • •Treatment <br /> _ <br /> Water <br /> �>I�r•rr1� <br /> t�Ft♦S1St r' <br /> PLant 'w ne•rwl rn r• <br /> --------------- <br /> Peak Day <br /> THE DRINKING WATER SYSTEM <br /> CapacityT Iddh <br /> ��—�- <br /> 1 Million <br /> Gallons • t Reservoir Mixing cliniflati ri Filtration DIArfedian sttorage�Customer <br /> . T T <br /> Supply Treatment Distribution <br />