Welcome to the Tri-Dam Project
Tri-Dam Project is a partnership between the Oakdale Irrigation
District and the South San Joaquin Irrigation District. 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.
The "Upper Works" include Donnells and Beardsley dams, reservoirs,
power houses and appurtenant facilities. The "Lower Works" refer
to the Tulloch development below Jamestown reaching into both Calaveras and
Tri-Dam Project is governed by a joint board of directors composed of the
five member boards of the two 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, California.
Please visit the Summit Ranger District website at http://www.fs.usda.gov/recmain/stanislaus/recreation for Donnells and Beardsley Reservoir recreation information. For recreation information at Lake Tulloch please visit: http://www.laketullochcampground.com/.
The Tulloch Fall/Winter 2014-2015 Tulloch Drawdown Schedule is now available on the Tulloch page.
Please visit Save the STAN
a public education effort of South San Joaquin and Oakdale Irrigation Districts.
Data for December 18
Click below for historical data
Current road conditions to Beardsley
Reservoirs can be found on their respective pages.