RES 87418 - Laserfiche WebLink

Cities of Pleasanton, Livermore, and Dublin, Zone 7 staff projects future water demand of 48,800 acre-feet in the year 2010, or an average compounded growth of approximately 2.2% per year. Estimated maximum day demand in 1987 is 34.1 million gallons. By the year 2010, it -is estimated that maximum day demand will be 70.7 million gallons. As noted earlier, Zone 7's SWP maximum annual water entitlement is 46,000 acre-feet. The ~1986 Planning Update of the State Department of Water Resources advised SWP contractors of the maximum available supply from existing SWP facilities. Using the State's "1986 Rule Curve Operating Criteria" and the 50th percentile for supply, Zone 7 staff estimates under current conditions that 31,000 acre-feet of SWP water would be available to Zone 7 about 50% of the time. The 50th percentile was selected by Zone 7 staff to compensate for the recharging of groundwater supplies during wet years and the greater than normal groundwater withdrawals during dry years. SWP water at 31,000 acre-feet, plus Zone 7's water rights of 8,000 acre-feet at Lake Del Valle, plus the aggregate 6,600 acre-feet annual independent quota of Zone 7's retailers results in a projected total supply of 45,600 acre-feet. At this supply level, Zone 7 staff estimates water supplies will be adequate to meet estimated future demand to the year 2006. The daily production capacity of Zone 7's existing facilities is 34 million gallons, which approximates current projected maximum day demand (34.1 million gallons). By the year 2010, maximum daily demand is estimated at 70.7 million gallons. A two-stage capital improvement program will be undertaken by Zone 7 to meet peak production needs. The first stage (1988-1991) provides for an 18 mgd expansion of the Zone's Del Valle Water Treatment Plant, the installation of two additional wells having a combined capacity of six mgd, and the installation of additional 36-inch water transmission pipelines. Stage I facilities, which are estimated to cost $30,330,000, will increase the daily production capacity of Zone 7's facilities to 61 mgd which will meet projected maximum day demand to the year 2003. Second-stage facilities, to be constructed over the period 2004-2010, include the installation of four additional wells having a combined capacity of 12 mgd. As of July 1, 1987, Zone 7 had $12,891,000 of available funds in its Facility Expansion and Improvement/Replacement Accounts. Zone 7 staff estimates the balance of Stage I costs can be met on a pay-as-you-go basis by anticipated water connection fee revenues, water sale revenue (which has a ra~e component for replacement currently set at two percent per year 18