Protecting the Stanislaus River


To make our communities aware of the key issues, the South San Joaquin and Oakdale irrigation districts and the Tri-Dam Project launched a public information campaign in 2015 called Save the Stan.

SSJID was established in 1909 and is located in Manteca. It provides agricultural irrigation water to about 55,000 acres in Escalon, Ripon and Manteca. In 2005, the district expanded into providing domestic water service to selected cities within its territory.

OID was created in 1909 and provides agricultural water to about 62,000 acres in northeastern Stanislaus County and southeastern San Joaquin County.

In 1948, SSJID and OID formed a partnership known as the Tri-Dam Project. Together, they developed, operate and maintain the Beardsley, Donnells and Tulloch projects including the dams, tunnels, penstocks, power houses, communications systems, and general offices. These facilities are located on the Middle Fork of the Stanislaus River in Tuolumne County, California.

Tri-Dam Project is governed by a joint board of directors composed of the five-member boards from each of the irrigation districts. The day-to-day activities of Tri-Dam Project and Tri-Dam Power Authority are managed by a general manager who reports to the board. The administrative offices of Tri-Dam Project are located in Strawberry.

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