The Fremont powerhouse was constructed in 1908 and, after 59 years of continuous service, generated its last electrical power in October 1967. In 1968, the California Pacific Utilities Company donated the entire complex to the U.S. Forest Service. The need for economic power surfaced in 1903 when the earnings of some local mines began to decrease. In an effort to operate the mines more economically, local waterpower was piped from nearby Olive Lake through an eight-mile long wood and steel pipeline to generate the much needed electrical power. (Some of the houses at the Fremont Powerhouse Complex are included in the cabin rental program. Please contact the Umatilla National Forest form more information.) Olive Lake Campground offers 21 trailer/tent campsites, 2 group sites, 2 tent sites and 3 day-use areas and allows both gas and electric trolling motors on the lake.