Planning files of the Power Management Branch regarding Boundary Dam on the Pend Oreille River, including studies, reports, surveys, hydrological data, correspondence, subject files, maps, drawings and photographs. Subjects include a 1958 joint study by the Bonneville Power Administration and City Light of the regulation of reservoirs on the Columbia River system to meet predicted loads and establish the capability of the Boundary Project. Also included are correspondence and court documents regarding litigation with Public Utility District No.1 of Pend Oreille County and US Federal Power Commission proceedings regarding the project.