Expeditions & surveys; Railroad surveys; Waterfalls; Cliffs; Great Falls (Mont.)
The cliffs at the falls are about "one hundred fifty to three hundred feet deep with a steep descent to within fifty feet of the bottom, and for the remaining distance perpendicular walls of red sandstone." "Above the falls the banks...
Expeditions & surveys; Railroad surveys; Marias River (Mont.)
Marias River "flows in a channel two or three hundred feet below the prairie level, and is tolerable well wooded. The water was at that time one hundred and fifty feet wide and two to four feet deep, slightly milky, with a swift current and...
Expeditions & surveys; Railroad surveys; Fort Okanogan (Wash.)
"Fort Okinakane (Okanogan) is an old and ruinous establishment of the Hudson Bay Company." "The character of the Columbia along the western border of the Spokane Plain and as far as Fort Okinakane (Okanogan) is described as follows:...