Lower Granite Lock and Dam plans

              Lower Granite Lock and Dam will be Che final link in a chain that will bring year
round, high volume water transportation to the Lewiston portion of the Inland Empire.
It is the fourth and last dam on the Lower Snake River Project authorized by the
Rivers and Harbors Act of March 2, 1945, Public Law 14, 79th Congress, 1st Session.
House Document 704 was the authorizing instrument that initiated work on the Lower
Snake River Project.
It is the culmination of years of work by citizens' groups, organizations, local,
county, and State governments, as well as the Federal government.
Ice Harbor was the first lock and dam constructed, and the facility was opened to
river traffic in October, 1962.  Lower Monumental was next, and traffic first went
through the lock in April, 1969.  Little Goose Lock and Dam opened up for boat traffic and the first power went on the line March 26, 1970.
The main dam contract for Lower Granite is over 70 percent complete. Work first
started in July, 1965. The main construction contract for $105 million was awarded
to Lower Granite Contractors, a joint venture of Guy F. Atkinson Company, Dravo
Corporation, the Arundel Corporation, and L. E. Dixon Company on May 13, 1970.  Lower
Granite Lock and Dam is scheduled for pool-raise on February 15, 1975 and completion
by November, 1975.
The four dams will add 1.5 million kilowatts of power to the Pacfific Northwest
Power Grid. When the future powerhouses are completed on the four dams, another
1.5 million kilowatts will be added to the system.
Although the main dam contract will constitute the major cost for any single item of
the estimated $298 million total cost of the Lower Granite Project, there is a tremendous amount of work to be done before the pool can be raised.
Of all the four dams on the Lower Snake, Lower Granite will generate more work on
road and rail relocations, recreation and park areas, levees and bridges, than any
of the other three.
One of the main reasons for this is that a good-sized metropolitan area is involved
in the Lower Granite Project.  Lewiston, Idaho, and Clarkston, Washington, is a mini-
megalopolis with a population of about 50,000 people.
Work that has to be undertaken by the Corps and others, concurrently, while the dam
is being finished, includes:
-Relocation of the Camas Prairie Railroad, Highway 12, and several other roads
and streets.
-Construction of the levees around Lewiston, landscaping, and parks.
-Construction of a temporary marina at Tammany Creek.
-Construction of recreation areas and permanent marinas.
-Removal of the Washington Water Power Dam Spillway.
-Relocation of effluent line from Potlatch Forests Inc.
-Relocation of utility lines crossing the rivers.
-Reconstruction and modification of municipal and industrial waste treatment
facilities.
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