Gerber Dam and Reservoir, on Miller Creek 14 miles east of Bonanza, Oregon, provides storage for irrigation and reduces flow into the reclaimed portions of Tule Lake and the restricted Tule Lake Sumps in the Tulelake National Wildlife Refuge. The dam, a concrete arch structure, has a height of 84.5 feet and a crest length of 460 feet. Reservoir capacity is 94,300 acre-feet.