PVPA operates in conjunction with the Six Basins Watermaster, which was established in 1998 to adjudicate rights to local water supplies, including groundwater produced from the Six Basins aquifers. Information regarding the Six Basins Judgment (click here to download the Judgment), which describes PVPA’s rights and responsibilities under the Judgment and Six Basins Watermaster. PVPA subsidizes Six Basins Watermaster operating costs, which helps keep water charges lower for communities receiving water from PVPA’s shareholders. Since the time of the Six Basins Judgement, PVPA has contributed nearly $1 million dollars to Six Basins Watermaster, including recently $250,000 towards the cost of a Watermaster strategic plan currently being prepared. 

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aboutus 3PVPA also coordinates its San Antonio Spreading Grounds activities with the United States Army Corps of Engineers, which controls the San Antonio Dam. Information regarding the Dam is linked here. During significant storm events the spreading grounds receive the release of water from the Dam via the concrete-lined San Antonio Channel, which is diverted into spreading basins and percolated into the Six Basins aquifers. The spreading grounds not only enable replenishment of the groundwater aquifers but also facilitate flood control operations to protect local and downstream communities.

In 2006, PVPA entered into a Memorandum of Agreement with Three Valleys Municipal Water District (TVMWD) so that when imported water is available it can be percolated on PVPA’s San Antonio Spreading Grounds for subsequent production from the Six Basins aquifers. Expansion of the pipeline system for spreading imported water continues as a result of maximizing the use of PVPA’s land in collaboration with TVMWD. 

aboutus 4PVPA’s Thompson Creek Spreading Grounds is operated in coordination with the Los Angeles County Flood Control District, which controls the Thompson Creek Dam. The Dam serves as a water conservation and flood control facility to enable the percolation of water into the Six Basins aquifers. In 2012, PVPA entered into a cooperative lease with the City of Claremont to allow part of PVPA’s land to be used without cost for Claremont Hills Wilderness Park visitor parking.

pvpa about 1Nearly 50 years ago, PVPA entered into agreements with sand and gravel companies operating on the San Bernardino/Upland part of PVPA’s San Antonio Spreading Grounds. As part of their sand and gravel operations, these companies create water spreading facilities for PVPA to maximize stormwater percolation and flood control management while also providing revenue to PVPA. All of this revenue, and other ancillary revenue generated from PVPA’s land, are used solely for Six Basins Watermaster budget augmentation, and PVPA operations and maintenance, including the construction of capital facilities as needed to maintain or enhance water spreading and percolation. This subsidizes water rates and reduces or stabilizes water-related expenses for Six Basins Watermaster and local water agency customers receiving water from PVPA’s shareholders. The State of California recognizes the Upland sand and gravel operations as a Regionally Significant Construction Aggregate Resource Area. Click here for a report from the State Mining and Geology Board.

For cost-control reasons, PVPA does not employ staff but contracts with two of its shareholders, West End Consolidated Water Company (through Upland City staff) and the City of Pomona, to provide administrative services and operate and maintain PVPA’s spreading grounds.