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Hoist rig over shaft of the drainage scheme in west slide area.
1936-05-01
2024-11-25 |
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Grout tank and reciprocating pump set up for grouting bed-rock.
1936-11-01
2024-11-25 |
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Department of the Interior. Bureau of Reclamation. Columbia Basin Project--Washington. Grand Coulee Dam: Foundation Grouting Sections
1935-11-06
2024-11-25 |
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Looking west across the aggregate processing plant at the Brett gravel pit. The two Dorr clarifier tanks and trommel screen house to the right, the sand and gravel screening and washing plant in center, and surplus sand pile in the distance.
1936-11-01
2024-11-25 |
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At the Brett gravel pit. Raw stock pile at top, below which is the trommel screening plant housing two 6 ft. by 22 ft. screens and two 20-inch gyratory crushers; next below is balancing pile and fresh-water tank. Screening and washing plant in...
1936-09-01
2024-11-25 |
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One of the control switchboards in aggregate processing plant.
1936-09-01
2024-11-25 |
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Dragline working on wall of aggregate in Brett pit for shovels operating on floor at elevation 1840.
1936-09-11
2024-11-25 |
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A five-yard shovel dumping in hopper on end of "pendulum boom" conveyor in Brett pit.
1936-05-01
2024-11-25 |
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Feeder and collecting conveyors at elevation 1840 in Brett pit.
1936-04-01
2024-11-25 |
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Two conveyor feeders with pendulum booms handling aggregate in Brett pit at the 1840 level, to the collecting conveyor
1936-09-01
2024-11-25 |
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Two conveyor feeders with 200-ft. pendulum conveyors. 5-yard shovels. In upper left is 6-yard dragline; in upper right a rotary 6-inch well outfit drilling series 50-ft. holes for shooting.
1936-09-01
2024-11-25 |
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Swinging "pendulum" boom conveyor, 200 feet long, hopper and five-yard shovel of a lateral to collecting conveyor at the 1840 level in Brett pit. In upper part is similar set-up.
1936-09-01
2024-11-25 |
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Two conveyor laterals running to collecting belt at the 1840 level in Brett gravel pit."Pendulum" 200-foot arm in lower right.
1936-09-01
2024-11-25 |
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Sixteen-inch grizzly dumping oversize rock at feeder hopper on swinging conveyor boom in Brett pit, later to be picked up by trucks for haul to crusher.
1936-09-01
2024-11-25 |
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One of the two 20-inch gyratory crushers in trommel screen house at aggregate pit.
1936-09-01
2024-11-25 |
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Waste (surplus) sand pile in center; blended sand for use, under trestle; and fine gravel pile to the right.
1936-05-06
2024-11-25 |
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Raw stock pile at Brett pit. In distance is Mason City; and across river, Coulee Dam. Opening in escarpment is north end of the Grand Coulee.
1936-09-01
2024-11-25 |
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Four-foot conveyor from screening and washing plant loaded with cobbles for stock piles at mixers.
1936-05-01
2024-11-25 |
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Aggregate stock piles near mixing plant. Two sets of three gravel sizes, one of cobbles, and one of blended sand.
1936-05-01
2024-11-25 |
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Center tower of conveyor suspension bridge. Top arm 180 feet long. Spans on either side, 1437 feet long.
1936-08-01
2024-11-25 |
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Looking down along suspension bridge carrying 36-inch aggregate conveyor to west concrete mixing plant. Length of bridge, 3508 feet.
1936-04-27
2024-11-25 |
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Cement storage and blending plant - storage capacity 55,000 barrels; air compressor plant in the rear.
1936-06-01
2024-11-25 |
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Unloading cement to storage silos with Fuller-Kinyon pump. Box-cars average 240 barrels each.
1936-06-01
2024-11-25 |
