Scope and Contents From the Series: A. Monthly Reports on Plant Maintenance, Apr. 1930-May 1931, 1 folder. Describing the condition of electrical and mechanical equipment. B. Proposals for Installation of Equipment, 1902-1903, 1 folder. Includes correspondence with the California Wire Works concerning construction of a tramway; with Pelton Water Wheel Company regarding pipelines; and with Allis-Chalmers Company for iron work. There are also blueprints, drawings, and receipts. C. Cost Records, 1910-1916,...