Report of the Secretary of the Army
on Civil Works Activities for Fiscal Year 1996
Department of the Army Corps of Engineers
Extract Report of the Walla Walla District
Little Goose Lock and Dam-Lake Bryan, Washington
Existing project. The project includes a dam, powerplant, navigation lock, fish ladder, and appurtenant facilities. The project provides for navigation, hydroelectric power generation, recreation, and incidental irrigation. The reservoir has a normal operating range between elevations 638 and 633 msl. Lake Bryan extends upstream about 37.2 miles and provides slack water to Lower Granite Lock and Dam. The dam structure is 2,655 feet long and about 165 feet above the streambed. Fish passage facilities include one ladder with entrances on both shores with a fish channel through the spillway, which connects to the powerhouse fish collection system and south shore ladder. The powerhouse has six 135,000 kw generating units in operation for a capacity of 810,000 kw. Spillway dam is 512 feet long and the overflow crest at elevation 581 msl is surmounted by eight radial gates, 50 feet wide and 60 feet high, which provide the capacity to pass a design flood of 850,000 cfs. Navigation lock is single-lift type with clear plan dimensions of 86 by 668 feet, and a 15-foot minimum depth over the sills. A navigation channel 250 feet wide, 14 feet deep, and 37.2 miles long is provided from the dam to Lower Granite Lock and Dam. Relocations along the lake included 32 miles of Camas Prairie Railroad, 6.8 miles of county roads, 2.2 miles of state highways, and Central Ferry Bridge. Principal project data are set forth in table 39-J.
Construction of the original project started in 1963, was placed in operation in 1970, and was completed in 1976. Construction of additional generating units started in 1974 and was completed in 1984. Power generation through September 1996 was 63.28 billion kw hours.
Location cooperation. None required.
Operations during fiscal year. Maintenance: Purchased and installed fishway bulkheads. Installed T1 disconnect. Operation and Maintenance: During the fiscal year, 3.4 billion kw hours of electrical power were generated by the six generating units. Traffic through the navigation lock consisted of grains, petroleum products, fertilizer, wood products, and miscellaneous cargo; and amounted to 3,776,256 tons during Calendar Year 1995.