The mountain Sheep — Pleasant valley project

The mountain sheep-pleasant valley project is located in the rugged, mountainous section of the Snake River, immediately downstream from the Idaho Power Company's Hell's Canyon site. The ultimate development will add 1,446 megawatts to the Northwest Power Pool which faces a possible shortage of power after 1960. The Pleasant Valley power plant (see Fig. 1) would have the third highest true-arch dam in the world, 534 feet, and would have generator units with a capability of 170,000 kilovolts each, larger than any present hydroelectric units. Application to build the two power plants was filed with the Federal Power Commission on September 7, 1955, by the Pacific Northwest Power Company.