In continuous use PG&E Drum Power House No. 4, 1928-1987. Produced 18,000 HP at 257 RPM and enough electrical power for 16,000 households. 12 ft. diameter, weight 15 tons. Built in San Francisco by Pelton Company. A constitutional bicentennial gift . . . — — Map (db m37151) HM
The Pelton Water Wheel, first commercially manufactured here at George Allan’s Foundry & Machine Works in 1879, was a major advancement in water power utilization and greatly advanced hard-rock mining. Its unique feature was a series of paired . . . — — Map (db m12796) HM