View File - Development Services - City of Oxnard

WATER RESOURCES TECHNICAL REPORTImported Surface WaterCity imported water supplies will be contracted through CMWD under the restructuredrate program. CMWD recently restructured its rate system to generally be consistent withthe approach used by Metropolitan in allocating water among its member agencies. Ingeneral, CMWD has developed a 10-year purchase order for each of its member agencies,including the City. As part of its purchase order, the City is provided an allocation of90 percent of its maximum demand from fiscal years 1989/90 to 2001/02. This allocation istermed Tier 1 water and is priced at a lower rate than water purchases that exceed thisallocation termed Tier 2 water. The Tier 1 allocation increases as a function of the 10-yearrolling averages of total purchases exclusive of agricultural water purchases. Over thecourse of the purchase order, each signator agrees to purchase 60 percent of its maximumdemand from fiscal years 1989/90 to 2001/02. If the purchase order minimum is notreached, then the signator would pay CMWD the difference in volume times the averagewater rate over the life of the contract. Tier 2 water prices significantly exceed the Tier 1water price. However, if CMWD is able to manage its water resources to the point that itdoes not have to purchase Tier 2 water from Metropolitan, then it will reimburse each of itsmember agencies in a relative proportion among those agencies that exceeded their Tier 1allocation. Any City purchases that exceed the Tier 1 historical 10-year rolling average willbe purchased at the Tier 2 premium amount. In addition, imported supply may not beavailable in all years; for example, due to State Water Project supply limitations in droughtyears and other emergency situations.3.2.2 Port Hueneme Water AgencyAs described above, PHWA has two primary sources of water for its supply, desaltedgroundwater and imported surface water from CMWD. The PHWA primary source ofsupply is groundwater from UWCD via the O-H pipeline that is desalted at the BWRDF tobe compatible with the quality of the imported surface water from CMWD that is deliveredvia the Industrial Lateral. This source is used to supplement flows produced at the BWRDF.The City of Port Hueneme, the Naval Construction Battalion Center Port Hueneme, and theNaval Air Weapons Station Point Mugu all have individual wells; but these are primarilystandby facilities. PHWA has been able to maximize its use of the local groundwater byoperating the BWRDF around the clock at a steady flow rate and storing excess water in thePt. Mugu reservoir.Over time, PHWA has been able to accumulate a sizeable unused groundwater allocation.The projected water demands and available supplies through 2020 are summarized below.As these data indicate, PHWA will continue to accumulate unused groundwater allocationfar into the future.W112003002SCO LW1458.DOC/ 033390002 41