East Bank Construction Trestles

East end of west section of high trestle, June 3, 1937

1937-06-03
2024-11-22

Completed Dam Foundation

Looking downstream. River flowing through low gaps in concrete in dam foundation. Downriver is highway bridge leading to Mason City, above which is huge pile of surplus sand. Corner of Government town site (Coulee Dam) shown in center, left.

1937-12-22
2024-11-22

Reinforced Draft Tubes

Downstream section in west powerhouse showing reinforcing in base under draft tubes.

1936-04-30
2024-11-22

Close Up of "Ice Dam"

Ice dam in deep gorge, upstream of east power house site blocks 67-69.

1936-12-03
2024-11-22

Reinforcing Drumgate "Lip"

On the left is shown the heavy mat of reinforcing steel embedded in the concrete to strengthen the overhanging lip to which the drum gate hinge anchors were fastened." The pipe shown in the center of the picture is part of the 60 inch drain for...

2024-11-22

Oil Circuit Breakers

Workmen installing Allis-Chalmers oil circuit breakers in the temporary 115-kv. switchyard.

1942-03-20
2024-11-22

Wall of Generator Pit

West wall of L-8 generator pit, through which workmen are cutting an opening for the penstock of a Shasta turbine. The wall was first drilled, then the center section will be blasted. Photo of workmen operating chippings guns.

1942-05-13
2024-11-22

Assembly of Steel Spider

Assembling the structural steel spider of a Shasta generator.

1942-07-20
2024-11-22

Completion of New Mixing Plant

The new Bureau of Reclamation mixing plant, erected near the large waste-sand pile on the east side of the river to supersede the contractor's plant. A two-yard, double-cone, tilting-type mixer will discharge batches through the floor into trucks...

1942-11-19
2024-11-22

Highway Slide Area

Temporary bridge across the upstream slide area. When the slide carried away a portion of the highway, this bridge was built. It will be used until permanent repairs can be made.

1940-11-26
2024-11-22

Construction Trestle and Conveyor System

Cofferdam removal near to completion at the close of 1937. The clamshell is unloading and removing cribbing in the spillway bucket section at blocks 39 and 40.

1938-01-01
2024-11-22

Rock Cleanup

4-yard shovel, 12-yard truck, and powder crew on rock cleanup in east tailrace area.

1937-06-04
2024-11-22

Diversion Slots

Upstream face of dam, showing fillet and one of the 50-foot wide diversion slots.

1936-11-01
2024-11-22

North End of Block Forty

North end of block 40 in foreground, timber crib plug to cofferdam cell cluster, center tower of aggregate suspension bridge tower in cell 5, cofferdam section "G"; Bridge spans on both sides of tower, 1437 feet. Elevation, top of tower 1280,...

1936-01-01
2024-11-22

East Side of "Ice Dam"

Looking through high trestle bents at ice dam in deep crevice on ease side.

1936-09-29
2024-11-22

Copper Cable Web Inside Pier Plates

Here is shown the manner in which the copper cable was laced thru the reinforcing web on the inside of the pier plates. When current is sent thru this cable it will cause the steel plates to become warm by electromagnetic induction, thus...

2024-11-22

Building Trestle Tower

Here a steelworker is setting the downstream leg of a trestle tower during the erection of the CBI trestle. As the dam grew, all but the floor sections of both the MWAK and CBI trestles were buried and forever lost.

2024-11-22

Shaft of Shasta Generator Upright

A Shasta generator shaft in an upright position, preparatory to the construction of the rotor.

1942-07-15
2024-11-22

Conveyor of New Mixing Plant

A bucket conveyor will be used to lift aggregate from timber bunkers to the top of the new Bureau of Reclamation mixing plant, where a chute will direct the flow into any one of three compartments of a storage bin.

1942-11-19
2024-11-22

Installation of Window Boxes

Workmen placing glass blocks in downstream windows of west powerhouse.

1942-06-26
2024-11-22

L-3 Generator-voltage Bus Structure

Main unit L-3 generator-voltage bus structure in the elevation 1012.5 transformer bus gallery of the left powerhouse.

1941-11-19
2024-11-22

Crown Placed on Scroll Case

Crown plate is placed on the scroll case of the 150,000 horsepower turbine for main unit L-3. A test ring (which does not show in this photograph) and the crown plate are temporarily assembled on the scroll case for the purpose of making the...

1941-02-06
2024-11-22

Falsework for Highway

Falsework and forms for the construction of the arch-type highway spans over the eleven drum gates in the 1650-foot spillway. The bridges will be comprised of 7400 cubic yards of heavily reinforced concrete. The elevation of the water in the...

1941-06-26
2024-11-22

Drum Gate Hinge Alignment

A crew of skilled mechanics work on the alignment of the anchor hinge castings for one of the huge drum gates. There are 40 of these hinges required for each gate.

1940-11-30
2024-11-22

East Bank Excavation

Shovel, bulldozers, and buggies removing overburden in east tailrace area. Riprapped tailrace slope shown in upper right, and excavation conveyor in foreground. East tower of aggregate suspension-bridge in upper part of photograph.

1937-03-12
2024-11-22