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.
Expeditions & surveys; Railroad surveys; Assiniboine Indians; Gifts; Fort Union (Mont.)
"Fort Union is situated on the eastern bank of the Missouri River, about 2 ¾ miles above the mouth of the Yellowstone. It was built by the American Fur Company in 1830, and has from that time been the principal supply store or depot of that...
"The altitude of this butte, as determined by barometric measurement, is 281.8 feet above the level of the Shyenne (Cheyenne) River." Named for "an engagement between some half-breeds and Sioux, in which one of the former, by the...
"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; Columbia River; Channels; Indian encampments; Canoes; Dalles (Or.)
The Dalles is a narrow place in the Columbia River, where the channel has been worn out of the rocks, below which about ten miles, is the mouth of the Klikitat River. Drawing shows an Indian encampment on the bank and a canoe on the water. Plate...
Expeditions & surveys; Railroad surveys; Hellgate River (Mont.); Floods
Lieutenant Mullan and party crossing the Hell-Gate River. This river being flooded, "his whole party and property were nearly lost in using a raft unmanageable in the swift current." Plate LVI.
Expeditions & surveys; Railroad surveys; Milk River (Mont.)
"The valley of the Milk River is wide and open, with a very heavy growth of cottonwood as far as the eye can reach, which is also to be found along the adjacent shores of the Missouri River." Plate XVIII.
"This valley for the most part is wide and open." There are "spurs separating it from the Hell-Gate Valley on the south," and "separate on the north the various tributaries flowing into the Blackfoot River." Plate LXII.