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476 - 500 of 2123 Items << < 15 16 17 18 19 20 21 22 23 24 > >>
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The elevation 1650 level of the Brett Gravel Pit is opened up for the mining of raw aggregate.
1938-05-24
2024-05-02 |
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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
2024-05-02 |
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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
2024-05-02 |
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Oil-gas forge and air operated drill sharpener on west side.
1905-04-19
2024-05-02 |
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Upstream penstock liner section number 1-2 is lowered to its final resting place in the dam.
1938-10-14
2024-05-02 |
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Closure gate slides into position. The truss supports the roller path guide frame down which the gate slides to its final position. The gate is lowered very slowly in order to prevent excessive fluctuations in the river surface levels below the dam.
1938-12-05
2024-05-02 |
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The Brett Gravel Pit, and the gravel processing plant. The huge sand pile, estimated at 4,000,000 cubic yards, is the surplus sand which has been wasted here after the gravel and cobbles were removed. In the foreground is the Mason City Airport.
1938-04-25
2024-05-02 |
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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
2024-05-02 |
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Grand Coulee Dam, viewed from the east side. In the foreground appear trestles, and crane equipment used for placing concrete; the middle ground shows excavation work in progress in the main river channel; the background shows concrete placed...
1937-03-17
2024-05-02 |
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Third Volume, Fifth issue, of the Mason-Walsh-Atkinson-Kier CO. builders of Coulee Dam Safety Newsletter. Created by the Safety Department and issued to the residents of Mason City and contract workers at Grand Coulee Dam.
2024-05-02
2024-05-02 |
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This view is looking northward across the dam site. In the right foreground is the town of Coulee Heights, and in the left center is that of Grand Coulee and Coulee Center. In the center of the picture is the excavation spoil bank, now almost...
2024-05-02
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Outlet tunnels in the spillway section of the Grand Coulee Dam passing 134,400 cubic feet of water per second. Thirty-four outlets were open, 18 in the upper tier and 16 in the middle tier.
1941-06-26
2024-05-02 |
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Excavation is started at the pumping plant foundation. The material to be removed is located in general between el. 1170 and el. 1280. The concrete in that portion of the dam shown on the right has reached an average elevation of 1000.
1938-05-19
2024-05-02 |
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East pit flooded behind Wakefield cofferdam (el. 965); Left foreground shows beginning of west end concrete placing trestle and east concrete mixer - at the right are aggregate stock piles and contractor's machine shops. Suspension bridge for...
1936-05-01
2024-05-02 |
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This is a Fuller-Kinyon pump unloading bulk cement directly from the car into the silo. By means of mercoid switches in the bell-shaped "wand" the operator holds in his hand, he is able to control the operation of all five of the motors on the...
2024-05-02
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Rebuilt 25-yard Woolridge buggy 16 wheels, and Caterpillar 75 tractor, working on the west side
1935-01-03
2024-05-02 |
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Note on album leaf: Deepest foundation depression. Ice dam restraining muck from flowing into pit.
PH Coll 239.35 |
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Note on album leaf: Excavating overburden.
PH Coll 239.16 |
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Governor Martin helping to vibrate first concrete poured in Grand Coulee Dam
1935-12-06
2024-05-02 |
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Department of the Interior. Bureau of Reclamation. Columbia Basin Project--Washington. Grand Coulee Dam U.S. Construction Railroad Alignment - Mile 0 to Mile 15
1934-04-18
2024-05-02 |
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Excavation at east end of dam- Ryan Contract
1934-06-27
2024-05-02 |
