Report of the Secretary of the Army
on Civil Works Activities for Fiscal Year
1993
Department of the Army Corps of
Engineers
Extract Report of the Walla Walla
District
Snake River Downstream from Johnson Bar Landing, Oregon, Washington, and Idaho
Location. On the Snake River downstream from Johnson Bar Landing, river mile 230. The Snake River, which is the largest tributary of the Columbia River, rises in Yellowstone National Park in western WY, flows generally westerly for about 1,000 miles, and empties into the Columbia River, near Pasco, Washington, 324 miles from the Pacific Ocean.
Existing project. The River and Harbor Act of 1945 authorized construction of dams, as necessary, for power, incidental irrigation, and open channel improvements for purposes of providing slackwater navigation and irrigation between the mouth of the Snake River and Lewiston, Idaho. That authorization modified previous authorizations only for the portion of improvement below Lewiston, Idaho. Acts of June 13, 1902, and August 30, 1935, as they pertain to open river improvement from Lewiston, Idaho, to Johnson Bar Landing, remain part of the existing project.
Improvements included in existing project are Ice Harbor Lock and Dam, Lake Sacajawea; Little Goose Lock and Dam, Lake Bryan; Lower Granite Lock and Dam; Lower Monumental Lock and Dam, Lake Herbert G. West; and open-river improvement, Lewiston to Johnson Bar Landing. Each of the four locks and dams is described in an individual report, and cost and financial data for the entire project are shown on tables 39-A and 39-K.
Ice Harbor, Lower Monumental, Little Goose, and Lower Granite are in full operation (see individual reports for details). For further details, see the following Annual Reports: page 2246 for 1903; page 1,986 for 1906; page 1991 for 1915; and page 1981 for 1962.
Local cooperation. None required.
Terminal Facilities. On Snake River from the mouth to Johnson Bar Landing there are 18 privately-owned barge terminals in use for shipping grain, petroleum products, fertilizers, wood products, cement, and other general cargo. There are also 5 marinas and 28 small-boat launching ramps, all open to the public. The facilities serve slackwater navigation to river mile 140, the site of Lewiston, Idaho. That slackwater reaches the Lewiston, ID and Clarkston, Washington area since the lake behind Lower Granite Dam was filled in February 1975.
Operations during fiscal year. See individual report for Ice Harbor, Lower Monumental, Little Goose, and Lower Granite Locks and Dams. On Snake River from Lewiston, Idaho, to Johnson Bar Landing, reconnaissance and condition surveys were conducted and survey markers were maintained. No costs were incurred this fiscal year.