Joint Board of Directors of the Tri-Dam Project/
Commissioners of the Tri-Dam Power Authority
Oakdale Irrigation District Directors
Brad DeBoer
Herman Doornenbal
Tom Orvis
Linda Santos
Ed Tobias
South San Joaquin Irrigation District Directors
John Holbrook
Bob Holmes
Dave Kamper
Ralph Roos
Mike Weststeyn
Members of the Joint Board of Directors and Commissioners may be contacted through their
respective irrigation district offices.
Oakdale Irrigation District (209) 847-0341
South San Joaquin Irrigation District (209) 249-4600
Tri-Dam Project Staff
General Manager, Jarom Zimmerman
(209) 965-3996 ext. 120
JZimmerman@TriDamProject.com
Finance and Administrative Manager, Brian Jaruszewski
(209) 965-3996, ext. 123
BJaruszewski@TriDamProject.com
License Compliance Coordinator / Tulloch, Susan Larson
(209) 785-3838
SLarson@TriDamProject.com
Operations and Maintenance Manager, Chris Tuggle
(209) 965-3996, ext. 121
CTuggle@TriDamProject.com