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About Casitas Water

Our District

The Casitas Municipal Water District supplies water to 60-70,000 people in Western Ventura County and to hundreds of farms. The District boundaries encompass the City of Ojai, Upper Ojai, the Ventura River Valley area, the City of Ventura to Mills Road, and the Rincon and beach area to the ocean and Santa Barbara County line.

In addition, the District operates the Lake Casitas Recreation Area, which has become a popular destination with over 750,000 visitors each year.

Our Mission

The ongoing mission of the Casitas Municipal Water District is to provide its service area with safe and reliable locally and regionally developed water and recreational opportunities in an environmentally and economically responsible manner. 


The District was formed in October of 1952. On March 1, 1956, the Ventura River project was authorized by Congress, which included the Robles Diversion facility on the Ventura River, the Robles Canal, and the Casitas Dam. The Casitas Dam was completed in November 1958. Lake Casitas holds 254,000 acre-feet of water when full.

Foundation Years

Throughout the late 1940s and early 1950s, residents and farmers alike continued their struggle to attain and retain precious water. In the growing community of Oak View, wells went dry and citizens began trucking in water. Truckers also hauled water to the Rincon area along the coast, where fresh running water was nonexistent.

In October of 1952, a handful of individuals formed the Ventura River Municipal Water District (VRMWD) with Leland G. Bennett as engineer-manager. In July of 1953, they opened a District office at 480 North Ventura Avenue in Ventura. As their first order of business, they asked the United State Bureau of Reclamation (Bureau) to make a water requirement and supply study of the Ventura River area.

With the results of their new investigation and previous studies in hand, the Bureau proposed a 250,000 acre-foot reservoir on Coyote Creek, a 500 cubic-feet-per-second diversion canal from the Ventura River to Lake Casitas and a backbone main conveyance system to distribute water throughout the District through 33-miles of pipeline. Casitas would furnish water for irrigation and for municipal and industrial use within its boundaries.

Congressman Charles Teague toured this area to take a look at the water picture for himself. In 1955, he introduced the Ventura River Project authorization bill to the United States House of Representatives.

The various bureaus within the Department of the Interior – U.S. Department of Agriculture, U.S. Fish and Wildlife Services, Army Corps of Engineers, U.S. Public Health Services and the State of California – were asked to review the proposal. All of these agencies favored the project except the State. They wanted to implement a smaller plan that would provide a 25-year supply of water at a smaller unit cost. They maintained this was all of the water we would need because Northern California water would eventually be available to us. It made more sense to local project organizers to take responsibility for their own water supply as much as possible.

Who Needs a New Dam?

Not everyone locally agreed with the plan for a new dam. Some people wanted the dam built elsewhere to preserve the Santa Ana Valley farmland.

A group called “The Taxpayers’ Committee” raised questions about tackling a project of this magnitude. They suggested it might be cheaper to desalt ocean water and they hired Stanford Research Institute to study the issue. However, the Stanford report confirmed the future needs for water and methods of developing a water supply project as determined by the Bureau.

The Committee then expressed concern about the project payment program. When the Bureau arranged an ascending schedule of annual payments, the Taxpayers’ Committee embraced the project. The Casitas Dam issue was then placed on the ballot. Voters were so enthusiastic about the dam that they approved the project and repayment plan by a 31 to 1 margin. Congress was so supportive that they approved the project in record time without opposition.

On March 1, 1956, the Ventura River project was authorized. Soon after, Congress appropriated $6,400,000 to start construction. VRMWD had negotiated a unique contract with the Bureau – one that gave them control of the District and even the water rights.

Casitas Dam Groundbreaking

The groundbreaking ceremony for Casitas Dam took place on August 27, 1956. Over the next two years, heavy equipment moved 9,500,000 cubic yards of dirt, sand and gravel – much of it removed from the Santa Ana Valley. Workers dramatically altered the face of the little valley in the process of building the dam.

At the Crest, the earth filled Casitas Dam originally measured 40 feet from lakeside to the face of the dam. The foot of the dam was 1750 feet thick. A seismic retrofit in 2000 increased the thickness of the dam by an additional 110 feet. The dam stretches 2060 feet from bank to bank and it stands 285 feet above the lakebed. There are 9 intake gates at different levels in the dam where water is taken, treated and released to the water distribution system to the public. A 750-foot-long access tunnel runs through the dam and leads to the hydraulic system for the gates. The lakebed encompasses 2,760 acres and has a 254,000 acre-foot capacity.

Casitas Reservoir was ready to start accumulating stream flows from Coyote Creek, Santa Ana Creek, and the Robles Diversion Canal by November 1958. A 33-mile network of concrete and steel pipe ranging form 12 to 54 inches in diameter ran from the lake through five different pumping plants and chlorination stations to six balancing reservoirs built to hold a total of 26 million gallons of treated water. Pipelines then continued to reach customers throughout the district and have since added over 95 miles of pipeline. District boundaries encompass Ojai, Upper Ojai, the Ventura River Valley, city of Ventura to Mills Road and the Rincon along the Pacific Ocean to the Santa Barbara County line.

Dam Completed

Once the Casitas Dam was completed Lake Casitas remained practically empty for four years. Water levels were only a foot and a half above the bottom of the lowest intake gate by 1961. Water was too low to get to customers. Plans were made to bring in barges with large pumps that could get the water into the intake structure.

It was February of 1962 when over 20 inches of rain fell within a five day period that Lake Casitas filled to 53,000 acre-feet of water. Then in 1969 there was too much water. Two “one-hundred-year storms” slammed the county. Rainfall reached 70 inches and caused $1.5 million in damages to the Robles Diversion Canal, several pipelines and the Casitas recreation area. The damage prevented Lake Casitas from filling up. It would not be until March 31, 1978 that water would flow over the Casitas Dam spillway.


The 1984 Olympic rowing and canoeing events took place at Lake Casitas. Throughout July and August of that year, thousands of straw hat-clad people came with their families to view the historic sporting event.

Ojai Water System Acquisition

On June 8, 2017, the Casitas Municipal Water District began operating and maintaining the Ojai Water System. This acquisition added over 2900 customers to the District. Since acquisition, the District has begun examining the Ojai Water System and making the necessary repairs and plans to improve the overall condition of the system. 

Rate and Method of Apportionment for CFD


Lake Casitas Watershed 

A significant amount of water drains into the lake from the watershed, or travels over land before entering the rivers or canal that lead to the lake. Because of this Casitas takes steps to preserve watershed areas. The Ventura River Watershed Boundary encompasses miles of land stretching from the Santa Barbara/ Ventura County line throughout the Las Padres National Forest to the district boundary in Upper Ojai and south to and through the city of Ventura to Mills Road. The Project Watershed is the area directly around the lake. The Teague Watershed encompasses 3,500 acres of land-most of it adjacent to the recreation area. There is a total of approximately 228 square miles of watershed area throughout the district. In order to more closely supervise the quality of your water, the federal government started buying land in what is now the Teague Watershed in 1974. This land is being returned to its natural state as permanent open space. Most of the residents have left the area, except for those who have lifetime leases. Activities that could impact the quality of our water are strictly prohibited within the Charles M. Teague Open Space Memorial Park. Because the Teague Watershed is so important to the quality of our water, a comprehensive inspection is done there every five years to identify and address any potential problems.

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