Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction; Concrete construction; Gravel.
Aerial view of the Brett gravel pit. This was a source of aggregate for concrete used in the construction of the Grand Coulee Dam. View is looking generally south.
Expeditions & surveys; Railroad surveys; Springs; Bitterroot Range
Near the summit of the Bitter Root Mountains, "a hot spring with a temperature of 132 degrees, around which was a fine prairie camping ground." Plate LVII.
Expeditions & surveys; Railroad surveys; Palouse River (Wash.); Mountains
The Peluse (Palouse) River "has its source in the main ridge of the Bitter Root" Mountains, "and flows in nearly a straight course through a valley some twenty miles wide," bearing north "through a country densely timbered...