Lake Isabella
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Through Reservoir
Capacity
The U.S. Army Corps of Engineers operates and has jurisdiction over the main and auxiliary dams. In 2006, Isabella Dam was found to be too unstable to hold a full amount of water and approximately 37% of a full reservoir had to be let out to restabilize the earth works. The U.S. Army Corps of Engineers did not let the water get above 63% of capacity until an estimated 10–15 years of studies and repairs were made. The Isabella Dam bisects an active fault that could lead to a catastrophic failure if an earthquake occurs along it. This fault was considered inactive when the site was studied in the late 1940s. The project to retrofit the dam was substantially completed in 2022.
On February 3, 2023, the Army Corps of Engineers requested a deviation from the operating pool restriction of 361,000 acre-feet (445,000 dam3) of water. If approved, Lake Isabella will be allowed to fill to its full capacity of 568,000 acre-feet (701,000 dam3) for the first time in nearly 15 years.
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Recreation
Kern County Parks maintains law enforcement and rescue responsibilities on the lake. Several recreation areas are located around the lake as a part of the Sequoia National Forest. The U.S. Forest Service oversees the majority of the land that touches the shore including boat ramps, campgrounds, roadways, and leases to private vendors providing services. The nearby towns of Lake Isabella and Kernville receive economic benefit from tourism created by the Lake Isabella Recreation Area and the whitewater rafting attraction of the Upper and Lower Kern River. Lake Isabella can be reached by car from Bakersfield via state Highway 178 and from Delano via Highway 155.