Donnells Dam (National ID # CA00264) is a dam in Tuolumne County, California.
The concrete arch dam was constructed in 1958, with a height of 317 feet (97 m), and a length of 750 feet (230 m) at its crest. It impounds the Middle Fork of the Stanislaus River for hydroelectric power, part of the Stanislaus River Tri-Dam project cooperatively owned by the Oakdale Irrigation District and the South San Joaquin Irrigation District. The site is surrounded by the Stanislaus National Forest.
The reservoir it creates, Donnell Lake, has a normal water surface of 418 acres (169 ha) and has a maximum capacity of 65,000 acre feet (80,000,000 m3). Recreation includes fishing, hunting, boating, camping and hiking.