Expeditions & surveys; Railroad surveys; Fort Vancouver (Wash.)
Drawing of Fort Vancouver which was the administrative headquarters and main supply depot for the Hudson's Bay Company's fur trading operations in the immense Columbia Department. Under the leadership of John McLoughlin, the fort became the center...
Expeditions & surveys; Railroad surveys; Canyons; Grand Coulee (Wash.)
"The Grand Coulee is about ten miles wide where it opens on the Columbia River at its northern end, which is a hundred feet above the water, and gradually widens toward the south; its walls, eight hundred feet high are formed of solid basaltic...
"The mission is located upon a hill overlooking extensive prairies stretching to the east and west toward the Coeur D'Alene Mountains and the Columbia River. About a hundred acres of the eastern prairie adjoining the Mission are enclosed and...
Expeditions & surveys; Railroad surveys; Fort Walla Walla (Wash.)
Fort Walla Walla was first built along the Columbia River by the Northwest Company to act as a trading center. A second fort was built by the Hudson Bay Company prior to 1831 and served as a frontier post protecting their interests. This was...
The lock is a single lift type, 86 feet wide and 683 feet long, with a 15-foot minimum depth over the sills. The vertical lifts average 75 feet. The lock is located on the Washington side of the Columbia River.
Architectural drawing of the McNary Dam, a 7365 foot hydroelectric dam that spans the Columbia River. McNary Dam is located one mile east of Umatilla, Oregon.
Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction.
The initial level of concrete has been poured across the entire distance of the bottom of the dam. The Columbia is flowing over the central portion of the dam.