Oral history interview with Randy W. Hardy conducted by Michael O'Rourke from June 11 to September 10, 2002, as part of the Northwest Power Planning Council Oral History Project. Hardy served as the executive director of the Pacific Northwest Utilities Conference Committee from 1982 to 1984, and as CEO of the Bonneville Power Administration from 1991 to 1997.

Oral history interview with John Harrison and John Shurts conducted by Michael O'Rourke on May 21, 1998, as part of the Northwest Power Planning Council Oral History Project. Harrison and Shurts discuss the work of the Northwest Power Planning Council, now known as the Northwest Power and Conservation Council, both on power planning and on salmon conservation.

Oral history interview with Roy H. Hemmingway conducted by Michael O’Rourke from August 29 to October 20, 2000, as part of the Northwest Power Planning Council Oral History Project. Hemmingway represented Oregon on the Northwest Power Planning Council, now known as the Northwest Power and Conservation Council, from 1981 to 1986.

Collection includes articles and photographs describing Kaplan turbines at the Bonneville Dam, 1937-1940, including descriptions of their special characteristics and installation. Also included are plans for the turbines. Paul Loveridge Heslop (1891-1956) was a mechanical engineer and chief of the Structural and Mechanical Section at the Bonneville Dam.

Oral history interview with Peter T. Johnson conducted by Michael O'Rourke from March 1 to September 9, 2002, as part of the Northwest Power Planning Council Oral History Project. Johnson served as administrator of the Bonneville Power Administration from 1981 to 1986.

Oral history interview with Kai N. Lee conducted by Michael O'Rourke from May 26-27, 1999, as part of the Northwest Power Planning Council Oral History Project. Lee represented Washington on the Northwest Power Planning Council, now known as the Northwest Power and Conservation Council, from 1983 to 1987.

Oral history interview with Jim W. Litchfield conducted by Michael O'Rourke from September 21-22, 2000, as part of the Northwest Power Planning Council Oral History Project. Litchfield was power planning director for the Northwest Power Planning Council, now known as the Northwest Power and Conservation Council, from 1981 to 1992.

The Northwest Power Planning Council is a four-state regional planning body formed by Congress in 1980 to make regional conservation and electric power plans. Collection includes correspondence, memos, records, reports, press releases, and news clippings.

Album of black and white photographs of the construction of a diversion dam on the Clackamas River, laying of water pipes, and the construction of the Oak Grove Powerhouse on the river.

Oral history interview with Peter J. Paquet conducted by Michael O'Rourke from October 21, 1998, to April 18, 2000, as part of the Northwest Power Planning Council Oral History Project. Paquet was wildlife and resident fish manager for the Northwest Power Planning Council, now known as the Northwest Power and Conservation Council, from 1984 to 2014.