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City of Pleasanton 5.0 Demands
<br />Final Water Supply Assessment
<br />Stoneridge Drive Specific Plan Amendment and Staples Ranch Project
<br />6.0 Demands
<br />Analysis of water demand, both historical and projected, is based on the same regional, local, and
<br />proposed-project areas as the analysis for supplies. The regional demand analysis addresses the
<br />greater regional demand context of Zone 7's service area, which includes SWP demands; the local
<br />demand analysis addresses the City of Pleasanton water system specifically, and the project-
<br />specific analysis demand calculations are based on the most recent land-use map and information
<br />from the project proponent.
<br />6.1 Regional Demands
<br />The regional area includes all of Zone 7's service area and covers demands on groundwater in the
<br />Main Basin and imported surface water supplies.
<br />6.1.1 Regional Historical and Projected Demands
<br />As stated previously, Zone 7 is a water wholesaler and supplies treated water to retail water
<br />agencies for M&I use. Specifically, the primary retailers are DSRSD, which serves Dublin, portions
<br />of San Ramon and the Dougherty Valley development; the City of Pleasanton; the CWSC and the
<br />City of Livermore, which together provide water service to the City of Livermore. Zone 7 also serves
<br />untreated surface water directly to several agricultural customers and a few other users.
<br />Table 6-1 shows the quantities of treated water supplied by Zone 7 to each of the retailers within the
<br />Livermore-Amador Valley over the last five years. As stated in Section 5, these deliveries by Zone 7
<br />were consistent with each retailer's annual treated water purchase request.
<br />Table 6-1: Zone 7 Historical Deliveries to Retailers 2002-2006 (AFA)
<br /> Year
<br /> 2002 2003 2004 2005 2006 Total
<br />DSRSD 8,728 9,140 10,978 9,626 9,825 48,297
<br />Ci of Livermore 6,733 6,394 6,785 6,625 6,893 33,431
<br />Ci of Pleasanton 14,744 14,367 15,614 14,553 14,911 74,190
<br />CWSC 7,971 8,267 8,994 8,108 8,784 42,124
<br />Annual Totals 38,176 38,169 42,371 38,912 40,414 198,042
<br />Source: Zone 7 Water A enc Retail Deliveries 2002-2006.
<br />6.1.1.1. Regional Projected Demands
<br />Zone 7's UWMP estimates population growth in Livermore-Amador Valley will plateau in 2025 at
<br />approximately 260,000 people and will remain stable (see Table 6-2).27 Table 6-3 shows the
<br />projected demands of each retailer served by Zone 7 over the next 25 years to 2030. According to
<br />contract provisions or other arrangements between Zone 7 and each municipality, each annual
<br />supply purchase request must be greater than the previous year's delivery.28 As demonstrated in
<br />Table 6-3, treated water quantities increase from 49,370 AF in 2010 to 61,120 AF in 2030. As
<br />expected, total water demands (treated and untreated) will increase from 57,620 AF in 2010 to
<br />69,370 AF in 2030. That quantity for Pleasanton increases from 18,320 AF in 2010 to 23,400 AF or
<br />roughly 20mgd in 2030.
<br />27 2005 Zone 7 Water Agency, Urban Water Management Plan, page 12.
<br />28 2002 City of Pleasanton Urban Water Management Plan, page 4-11.
<br />P:\Projecls - WP Only\{7162.01 Staples Ranch WSA\Finel\Final WSA.doc 6-1
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