High Trestle Cement Placement

Concrete blocks and high trestle bents west of spillway section.

1936-05-22
2024-11-22

Trashrack Structures

These are the pumping plant intake trashrack structures, as seen from the main dam which crosses to the left. The rising waters of the forebay are already a considerable depth in front of them." The wing dam is only 1/50 the size of the main...

2024-11-22

Jackhammer on the Trestle

Jackhammer work, preparing for repairs of a spall area on the face of the spillway.

1942-10-26
2024-11-22

Lowering of Stator

Lowering stator of main unit L-3 into place, in left powerhouse.

1941-05-20
2024-11-22

Concrete highway Arch over a Drum Gate

Footings for bents to support falsework for a concrete highway arch over a drum gate.

1941-06-19
2024-11-22

Drum Gate Hinges

The drum gate is hinged on castings anchored along the upstream side of a recess in the spillway crest. In the lowered or open position, the drum gate rests in the recess or chamber with its upper or upstream side forming the smooth curve of the...

2024-11-22

Steel Conduit Liner

A plate steel conduit liner, 102-inch inside diameter, is lowered to a block in the spillway section of the dam. Below are the partially installed castings for a ring seal gate installation at elevation 1136.

1939-12-01
2024-11-22

Cantilever Crane

High and low trestles, looking west. Reinforcing steel for east power house penstocks.

2024-11-22
2024-11-22

Hexagonal Penstock Blockouts

Reinforcing around 24-foot hexagonal blockouts for 18-foot penstocks. Top of 1024 elevation trestle in distance.

1936-11-01
2024-11-22

Mixing Plant Deconstruction

Like many old construction landmarks, the CBI concrete mixing plant, often aptly referred to as "the house of magic" because of its almost-automatic operation, is disappearing from the project. It was erected early in 1938, to produce the...

1942-11-27
2024-11-22

Girders Ready for Sandblasting

Steel from the CBI trestle ready for sandblasting on top of the dam. The plate girders were re-fabricated and used in the east powerhouse roof.

1942-08-04
2024-11-22

Transformer Frames

Transformer tie-down portal frames and disconnecting switches on transformer deck of left powerhouse.

1941-08-06
2024-11-22

Outlet Works

The outlet works at elevation 1036 have been embedded in concrete, and formwork is in place for the gate gallery control chamber. The four vertical pipe headers on each side of the gate chamber forms are the air vent headers for the outlet gates--...

1939-09-21
2024-11-22

Frozen "Ice Dam"

"Ice Dam" and refrigerating plant, located upstream from block 66.

1937-11-01
2024-11-22

East Bank Bedrock

Excavation of rock and common in river channel near downstream cross-river cofferdam. Draglines cleaning out crevice, and jackhammers drilling holes for blasting. Tripod for 36-inch Calyx hole to left of center in foreground. Conveyor in left center.

1937-04-02
2024-11-22

Powerhouse Floor

Setting on the powerhouse floor at El. 991, between generators L-2 and L-3, steel plates on which to assemble the stator of Shasta generator.

1942-06-26
2024-11-22

East Powerhouse Near Completion

The right powerhouse nearing completion. The control bay remains to be added. Plyboard coverings have been placed over the 40' x 17' windows. The elevation of the river is 938.12, and the flow over the spillway, 41,000 c.f.s.

1942-11-05
2024-11-22

Crane Unloading Steel Girders

Coaster-gate crane unloading plate girders from dismantled CBI trestle, on the ready way to the dam, for sandblasting and alteration. They were used in place of trusses in the East Powerhouse roof.

1942-07-17
2024-11-22

Transformer Frames

Assembling transformer tie-down portal frames on the left transformer deck and lightning arresters on the face of the dam.

1941-06-25
2024-11-22

Spillway Road Construction

Spillway roadway under construction, looking westward from block 64 elevator tower

1941-09-29
2024-11-22

East Powerhouse Substructure

Turbine pits in east power house low trestle above. High trestle at extreme top.

1937-10-29
2024-11-22

Cement Placement

Placing concrete in the west training wall.

1936-05-19
2024-11-22

Cylinder Hoist

It is believed that this installation at Grand Coulee Dam is the first where a cylinder hoist has been used for a gate having the same general functions. Gates of similar design are being installed at Shasta Dam also.' This main unit coaster...

2024-11-22

Steel Closure Gate

The upstream side of a 70-ton closure gate used for river diversion purposes. The lower enclosed section of the gate was made into water tight compartments

1938-08-04
2024-11-22

Westmix Concrete Equipment

Two 2,500 c.f.m. air compressors at the cement plant.

1935-10-16
2024-11-22