Section of Conveyor

Extensible section of the 60-inch excavation conveyor.

1935-05-01
2024-11-22

Building Elevation 1081 Construction Trestle

The elevation 1024 construction trestle, used by the M.W.A.K. Company, was dismantled by the new contractor.

1938-05-10
2024-11-22

Long View of Both Worker Camps

The two camps at the dam site. In the foreground is the "Coulee Dam" the Government Camp; and across the river is "Mason City" the contractor's camp.

1936-08-26
2024-11-22

Concrete Mixing Facilities

Ten 5,000 barrel steel silos of the cement storage and blending plant - air compressor plant at the left.

1935-09-26
2024-11-22

Excavation on West Bank of Columbia

Five-yard shovel loading a 15-yard buggy in west tailrace area.

1935-06-24
2024-11-22

Removing Unstable Bedrock

Drilling weathered rock at top of foundation, east end of dam.

2024-04-22
2024-11-22

Cross-River Cofferdam

Placing timber cribs in east end of upstream cross-river cofferdam. Abutment of west end of coffer is steel cell in west cofferdam shown to the left.

1936-09-09
2024-11-22

Westmix Concrete Equipment

Sand dewatering rakes at aggregate processing plant, Brett pit.

1935-09-03
2024-11-22

Trailer loaded with Boiler

Seventy-five ton trailer truck moving a 300 horsepower boiler.

1935-05-27
2024-11-22

Foundation Drilling for West Side Cofferdam

36-inch Glyx drill hole in west bedrock.

1935-09-25
2024-11-22

Weekly Paychecks

Receiving weekly pay checks at contractor's office.

1936-07-07
2024-11-22

Cross-River Cofferdam

Shore-end of downstream cross-river cofferdam.

1936-09-01
2024-11-22

Stripping Brett Gravel Pit

Stripping at Brett gravel pit, using two LeTourneau 6-yard scrapers with a Caterpillar 75.

1935-05-24
2024-11-22

Diagram of Left Switch Yard

Grand Coulee Power Plant Left Switchyards-elec. Installation switching diagram.

1944-02-12
2024-11-22

Coulee Dam irrigation pumping plant and discharge pipes--placing reinforcing steel

Construction of the Pumping Plant Structure, Grand Coulee Dam, Coulee Dam, Washington. Installation of pumping unit P-2 discharge pipe, showing reinforcing steel being placed in concrete form is the square opening of the block out which extends...

1949-05-16

Outlet Works Blockouts

Blockouts completed for the elevation 934 outlet works conduit gates by the Mason-Walsh-Atkinson-Kier Company. They are 26'-10" x 30' in size, with floor elevation at 917.5 and the top at elevation 975. Due to the inability of the Hardie-Tynes...

1937-01-24
2024-11-22

Diversion Channels

Diversion channels through the dam, showing floe ice floating in river.

1937-01-07
2024-11-22

Cement Mixing Plant

Westmix concrete plant.

1936-06-01
2024-11-22

Wooden Barge Construction

Building a barge on east side. The town "Coulee Dam" across the river

1936-09-01
2024-11-22

Westmix Concrete Plant

The westmix concrete plant. Unloading level is at 1024, elevation of high trestle on the left. At the right is shown the skip transfer arrangement to low trestle, elevation 950.

1935-11-30
2024-11-22

Construction Equipment For West Cofferdam

Wood Gantry for six hammers in pile driving on west cofferdam

1935-03-08
2024-11-22

Diamond Drill and Operator

This is a diamond drill rig in operation. A compressed-air motor rapidly spins the hollow shaft, down which water is forced to cool the bit, and carry away the cuttings. The core specimen rises in the hollow drill stem as the bit cuts downward....

2024-11-22

Steel Closure Gate

A closure gate moves slowly into position. When rollers of the gate are placed against the roller path guide frame (the truss of which is visible); the derrick will lower the gate, thereby cutting off the river flow through this diversion channel....

2024-12-22
2024-11-22

West Cofferdam Cells

Cells in section "E" of west cofferdam with filling partly removed - looking downstream.

1936-08-28
2024-11-22

Excavation Behind East Side of Wakefield Cofferdam

Excavating on east side behind south end of Wakefield cofferdam. Material transported by 90-inch conveyors across river on trestle to main conveyor running to Rattlesnake Canyon.

1936-10-01
2024-11-22