Upper Santa Clara River Watershed
Integrated Regional Water Management Plan
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Integrated Regional Water Management Plan

The Integrated Regional Water Management Plan (IRWMP) is a document that identifies and plans for the water resource-related needs of the Upper Santa Clara River Watershed. The IRWMP examines current and future water-related needs, identifies regional objectives for water-related resource management, develops strategies to address identified needs and then evaluates and offers various projects to meet the regional objectives. The purpose of the IRWMP is to integrate planning and implementation efforts and facilitate regional cooperation, with the goals of reducing water demands, improving operational efficiency, increasing water supply, improving water quality, and promoting resource stewardship over the long term. A collaborative stakeholder-driven process was used to develop the IRWMP. The IRWMP effort was funded entirely by local participating agencies.

The IRWMP is now complete and you can view the document by clicking here.


The Santa Clara River is the largest river system in southern California that remains in a relatively natural state. The river originates in the northern slopes of the San Gabriel Mountains in north Los Angeles County, traverses in a westerly direction into Ventura County and discharges into the Pacific Ocean. The river runs approximately 100 miles from its headwater near Acton, California to its outlet, the ocean, and drains an area approximately 1,634 square miles. Approximately forty percent of the watershed is contained in Los Angeles County and 60 percent in Ventura County.

 
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