Construction Equipment For West Cofferdam

Wood trestle used in driving west cofferdam. Lower right corner is contractor's catwalk across Columbia River

1935-01-30
2024-11-25

Construction of West Cofferdam

Starting a new steel cell in west cofferdam.

1935-02-02
2024-11-25

West Cofferdam Nears Completion

West cofferdam nearing completion. Excavation spoil conveyer in upper left hand corner. Contractor's cast field office, warehouse, and machine shop in foreground.

1935-02-26
2024-11-25

Constructing Coffer Dam with Steam Hammer

Placing a 6 1/2-foot-ton McKiernan steam hammer in pile driving.

1935-03-08
2024-11-25

Construction Equipment For West Cofferdam

Wood Gantry for six hammers in pile driving on west cofferdam

1935-03-08
2024-11-25

Construction Equipment For West Cofferdam

Wooden steam hammer gantry and clyde wiley whirley driving piles in west cofferdam.

1935-03-08
2024-11-25

Construction Equipment for West Cofferdam

Two fixed pile hammer steel structures, each covering a cell in section "H" of west cofferdam

1935-03-13
2024-11-25

The Completed 3,000 ft. West Cofferdam

The 3,000-foot west cofferdam. Excavation activities in west slide area.

1935-03-20
2024-11-25

Failure of Cell in West Cofferdam

Failure of a cell in section "E" of west cofferdam, due to shearing of rivets in a "Y" pile.

1935-04-10
2024-11-25

Grand Coulee Cofferdam Plan

Note-Shaded Sections of Cofferdam are to be removed for future diversion of river

1905-04-17
2024-11-25

Constructing Westside Cofferdam

Equipment constructing the west cofferdam

1935-02-02
2024-11-25

Conveyor System of Westside Cofferdam

Shuttle conveyor for filling cells in west cofferdam.

1935-03-18
2024-11-25

Conveyor System of Westside Cofferdam

Part of shuttle conveyor system for filling cells in west cofferdam

1935-03-18
2024-11-25

Connecting Downstream With The Westside Cofferdam

Building steel cells connecting downstream end of block 40 with cell cluster "G" in west cofferdam

1935-09-03
2024-11-25

Close Up of Girder Design on West Cofferdam

Box girder type piles at junction of arches in standard section interlocking piles enclosing excavation for block 40

1935-09-04
2024-11-25

Construction of West Cofferdam

Excavating for block 40 behind section "E" of west cofferdam.

1935-09-26
2024-11-25

Construction of West Cofferdam

Excavation for block 40, cross-river conveyor trestle at right - crossing over cell cluster "D" of west cofferdam.

1935-09-26
2024-11-25

Aerial View of West Side Cofferdam

Preparing for block 40 inside west cofferdam.

1935-11-01
2024-11-25

Excavation for West Side Cofferdam

Timber trusses between steel piling diaphragms in excavation for block 40.

1935-11-30
2024-11-25

Excavation for West Side Cofferdam

Bedrock in excavation for block 40.

1935-12-03
2024-11-25

Aerial View of West and East Cofferdams

Excavating for block 40 behind section "E" of west cofferdam. East cofferdam across the river.

1935-12-04
2024-11-25

Location Map for the Grand Coulee Dam

Department of the Interior: Bureau of Reclamation Columbia Basin Project-Washington Grand Coulee Dam Location Map

1934-10-08
2024-11-25

Foundation Drilling for West Side Cofferdam

36-inch Glyx drill hole in west bedrock.

1935-09-25
2024-11-25

Calyx Drill Cores

36-inch Calyx drill cores.

1935-09-25
2024-11-25

Calyx Drill Rig on West Side of Grand Coulee Dam

Thirty-six inch Calyx Drill rig on west side.

1935-09-26
2024-11-25