Scope and Contents From the Collection: The records of the Bunker Hill Research and Development Division span the years 1922 to 1982, with the bulk of the material covering the years 1945 to 1975. The papers include brochures issued by the company, organizational manuals, reports on various research and development projects, papers dealing with Washington Water Power requests for rate increases, drawings of plant flow sheets, aerial views of the plant and smelter, and visitors registers. Two other Bunker...