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City of Pleasanton 6.0 Supply Demand Comparison
<br />Final Water Supply Assessment
<br />Stoneridge Drive Specific Plan Amendment and Staples Ranch Project
<br />Table 7-2: Zone 7 Single Driest Year Water Supply and Demand (AFA)
<br />
<br />Water Su 1 Source Single Driest Year
<br />2005-2012 Single Driest Year
<br />2013-2030
<br />SWPa 4,030 4,030
<br />SWP Car over Su I b 20,000 20,000
<br />STWSD Pum back 8,170 8,170
<br />Cawelo Pum back ~ 10,000
<br />Arro o del Valle Watershed 20 20
<br />Groundwater Main Basin 28,200 28,200
<br />BBID 2,000 2,000
<br />Su I Total 62,420 72,420
<br />Estimated Demand Totals° 57,620 69,370
<br />Available Su lus 4, 800 3, 050
<br />Notes:
<br />a. DWR calculated that approximately 5 percent of annual supplies available in Single Driest Year.
<br />b. SWP Carryover Supply is surplus Zone 7 water stored in DWR facilities in wet or normal years.
<br />c. Used 2010 demand from Tables 19 and 20, 2005 Zone 7 Urban Water Mana ement Plan, a e 65.
<br />Table 7-3: Zone 7 Multiple Dry Years Water Supply and Demand (AFA)
<br /> 2005-2012 2013-2030
<br />Water Supply Source Year 1 Year 2 Year 3 Year 1 Year 2 Year 3
<br />SWPa 66,280 8,060 69,420 66,280 8,060 69,420
<br />SWP Car over Su I b 10,000 10,000 0 10,000 10,000 0
<br />STWSD Pum back 0 8,680 8,150 0 8,680 15,480
<br />Cawelo Pum back 0 10,000 0
<br />Arro o del Valle Watershed 380 290 4,250 380 290 4,290
<br />Groundwater Main Basin 17,000 33,400 17,000 17,000 30,730 17,000
<br />B ron Bethan Irri ation District 2,000 2,000 2,000 2,000 2,000 2,000
<br />Su I Total 95,660 62,430 100,820 95,660 69,760 108,190
<br />Estimated Demands 57,620° 57,620` 57,620° 69,3704 69,370° 69,3704
<br />Available Sur lus 38,040 5,000 43,200 26,290 390 38,820
<br />Notes:
<br />a. SWP supplies calculated by DWR with DWRSIM modeling and compared to CALSIM II estimates in the 2002 SWP Delivery Reliability Report.
<br />b. SWP Carryover Supply is surplus Zone 7 water stored in DWR facilities in wet or normal years.
<br />c. Assumed 2010 demand from Table 19, 2005 Zone 7 Urban Water Management Plan, page 65.
<br />d. Assumed 2030 demand from Table 20, 2005 Zone 7 Urban Water Mana ement Plan, a e 65.
<br />Zone 7 has developed a water supply portfolio capable of meeting all demands in any given year.
<br />Tables 7-2 and 7-3 illustrate the available water supplies as hydrologic conditions change when
<br />compared to demand changes of the next 25 years.
<br />This WSA assumes that Zone 7 will adhere to the goals and policies set forth in Board Resolution
<br />No. 04-2662 by meeting retail customer demands (purchase requests) first, followed by fulfilling
<br />those obligations needed to maintain their annual water storage portfolio. As shown in Table 7-4,
<br />the 2007 Annual Sustainable Supply of 87,500 exceeds Total Water Sales in every year. Thereby,
<br />Zone 7 could have surplus water available to use for "operational storage" after meeting retail
<br />customer demands. Furthermore, as demonstrated in Table 7-4, Zone 7 has adequate supplies
<br />P:1Proiecb - WP On1y141162.01 Smples Rench WSA~FInePFinal WSAdoc 7-2
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