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126 - 150 of 1628 Items << < 1 2 3 4 5 6 7 8 9 10 > >>
126 - 150 of 1628 Items << < 1 2 3 4 5 6 7 8 9 10 > >>
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Building steel cells connecting downstream end of block 40 with cell cluster "G" in west cofferdam
1935-09-03
2024-04-25 |
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Erection in progress on drum gate No. 1. When fully assembled, the Grand Coulee drum gates are 135 feet long 28 feet high and weigh 735 tons.
1940-12-05
2024-04-25 |
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Cantilever and whirley cranes on elevation 1024 and 950 trestles.
2024-04-25
2024-04-25 |
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Assembling the structural steel in the end section of a drum gate.
1940-12-05
2024-04-25 |
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Third Volume, Twenty First 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.
2024-04-25
2024-04-25 |
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Looking southeast at Block 40, timber plug on spillway to section "G" of west cofferdam, ends of the two placing trestles, and cell cluster in section "D";
1936-06-26
2024-04-25 |
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Third Volume, Twenty Second 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.
2024-04-25
2024-04-25 |
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General view of the right or training wall end of the left power house. As of this date, construction of the power house roof was in progress and had been completed at several bays.
1939-11-14
2024-04-25 |
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Third Volume, Tenth 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.
2024-04-25
2024-04-25 |
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Erection of the downstream skin plates on drum gate No. 1.
1940-12-07
2024-04-25 |
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A view of construction workers operating tractors as they construct a highway across the desert floor during the summer of 1931.
2024-04-25
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View of construction workers working on Hoover Dam. They are building railroad tracks at the site. Equipment and a truck can be seen.
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A bridge stretches from one side of Black (not Boulder) Canyon to the other side, with the Colorado River flowing beneath. The background shows scaffolding against the mountainside. A building sits against the mountain at the far end of the...
2024-04-25
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Interior view of the Nevada valve house. Construction scaffolding surrounds the installation of the needle valves and gates. Two construction workers can be seen in the rear at an unfinished opening to the valve house.
1935-09-27
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Shows a dump truck and construction workers framed at the mouth of a diversion tunnel during the construction of Hoover Dam.
1933-05-10
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Shows construction with concrete pouring forms going on on the top of Hoover Dam. There is a blurred image of a construction worker in the upper right corner, and a cableway with some sort of bucket is above the dam. There is a mountain in the...
1935-01-28
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Shows the cleanup work being done at the lower portal on the Nevada side of the canyon. A power shovel with men aboard is visible. Also cables and other equipment can be seen. The portal is jutting out of the side of the canyon.
1935-08-26
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Construction crew busy making forms at the bottom of Black (not Boulder) Canyon. There are tracks leading into the water that is in the canyon and there is a couple of carts sitting on the tracks. Several of the crew are digging or shoveling...
2024-04-25
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Shows the interior of a diversion tunnel at Hoover Dam during its construction. A construction worker and equipment can be seen. Note the cleanup operations, getting ready for the carpenters.
1935-10-29
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View of construction work inside the portal of the no. 1 penstock raise. Construction workers can be seen on the framework outside of the portal.
1934-08-31
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A construction worker is operating a construction tractor with an attached trailer that is filled with boulders, rocks and dirt.
2024-04-25
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Looking into the interior of a partially constructed diversion tunnel. There appears to be some sort of scaffolding for construction workers to stand on and the tunnel is illuminated by electric lighting.
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View of construction workers buidling wooden forms for concrete pouring on Hoover Dam. The concrete dam wall is partially finished, and framework surrounds the beginning construction of the intake towers.
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Shows construction workers posing on the drilling jumbo inside a diversion tunnel during the construction of Hoover Dam. Other men are standing on the floor of the tunnel looking up at the jumbo. Electric lights illuminate the tunnel.
1932-04-12
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View of the diversion of the Colorado River into diversion tunnel no. 1 as the gate on diversion tunnel no. 4 is being lowered (on the left). A line of construction workers can be seen standing on the bank of the cofferdam in front of a power...
1935-02-01
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