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226 - 250 of 251 Items << < 5 6 7 8 9 10 11 > >>
226 - 250 of 251 Items << < 5 6 7 8 9 10 11 > >>
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"# 770 Nine ""covered wagons"", each having a capacity of forty-eight men, are used to transport the workmen from Boulder City to the canyon. These buses are canvas-covered, the side curtains of which can be raised during hot weather, January...
2024-05-05
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"#177 Drilling Cape Horn for Canyon Railroad grade. Sept. 9, 1931.
#178 Drillers on Canyon Wall near Cape
Horn, for 720 Grade of Six Companies* railroad down Canyon. Sept. 9, 1931.
#97 Crowds seeking employment and their...
2024-05-05
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"#190 Approach out to Lower End Tunnels No. 3 and No. 4, Arizona side -Sept. 1, 1931.
#203 Approach cut to Lower Portal
Ho. 4, Arizona side - Sept. 18, 1931.
#250 Colorado Hirer, High Water - at
Lower Portal Bo. 4 - Sept. 25,...
2024-05-05
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"# 690 Pile and trestle bridge crossing the Colorado
River, approximately 11 miles above the damsite on the railroad, leading to the gravel pits on the Arizona side of the river. This bridge is 37 feet above the water-level shown in the...
2024-05-05
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"#23 - Shovel Excavation of Blasted Rock Cut, Highway to Top of Dam June 2nd, 1931.
#25 - Bucyrus-Erie and #1 Marion
Electric Shovels Excavating on different levels at Lower Portals #1 & #2 Tunnels. July 6, 1931.
#26 - 43-B Bueyrus Erie...
2024-05-05
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"#52 - Cat Walk & Plant at Nevada Adit. August 9, 1931.
#53 - Arizona Adit & Bunkers August 9, 1931.
#54 - Boat Landing: Incline Track Compressor Plant & shop Arizona Adit
August 9, 1931.
#55 - Compressor Plant, Arizona Adit August 9, 1931
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2024-05-05
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"#286 workers coming for lunch. Boulder City, Nevada. Sept. 27, 1931.
#285 Miners and workmen leaving
Boulder City for the Canyon -Sept. 27, 1951.
#209 Six Companies' Hospital under construction - Boulder City, Nevada - Sept....
2024-05-05
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"3312 The Arizona Valve House, from the Nevada side. May 27th, 1935
3311 The Nevada Valve House, from the Arizona side. May 27th, 1935.
3277 Telephoto view, from the Arizona side, showing portion of the Nevada Powerhouse. May 27th,...
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"2478 Arizona Intake Towers. December 27th, 1933.
2476 Nevada Intake Towers. December 27th, 1933.
2479 Arizona Intake Tower Derrick. December 27th, 1933."
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"3487 Boulder Dam and Powerhouse, looking upstream from the lower cofferdam. October 28th, 1935.
3501 Looking upstream in No. 2 downstream plug, showing the water conduit being placed. October 28th, 1935.
3500 Boulder Dam Switchyard,...
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"2703. Nevada Power House, from the Arizona Valve House bench. May 29th, 1934.
2702. Arizona Power House, from the Nevada Valve House bench. May 29th, 1934.
2701. Boulder Dam and Power House, looking upstream from the Downstream...
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"2653 View of Boulder Dam and the Nevada Intake Towers, taken from the Arizona side. 'Monkey Slide"" down Nevada abutment of Dam shown in center. April 28th, 1934.
2643 Unloading 8 1/2 ft. I. D. Valve House outlet pipe, with the Government...
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"3269 Boulder Dam, looking downstream from the Arizona side. May 27th, 1935.
3296 Boulder Dam, looking downstream from the Nevada side, showing Spillways and the Intake Towers. June 1st, 1935.
3284 Looking in a general downstream...
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"2558 General view of Himix, including Blending Plant silos at left rear of picture. March 1st, 1934.
2543. Looking downstream in Lower No. 2 plug, showing form work. February 20th, 1934.
2542 Excavation for bridge abutment in Arizona...
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"2941 Looking downstream at Boulder Dam, from the Arizona rim, showing the Intake Towers. December 3rd, 1934.
2939 View taken from the Arizona abutment, looking across the top of Boulder Dam. December 3rd, 1934.
2954 Nevada Power House,...
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"3118 Looking down on top of Boulder Dam. Note the bucket pouring the roadway on ""R"" block at Elev. 1232.
February 25th, 1935.
3141 A view of Boulder Dam Lake and reservoir area from Observation Point. March 4th, 1935.
3126 Telephoto...
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"2301 Hoist House and Nevada Anchorage, Government Cableway August 9th, 1933.
2310 Trains on Elev. 720 Railroad Bench, hauling concrete to Hoover Dam. August 12th, 1933.
2322 Hoover Dam August 15th, 1933."
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Looking upstream in Black Canyon, showing discharge of Colorado River through the Arizona Valve House of Boulder Dam.
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"2230 General view of bedrock for Hoover Dam, showing final excavation cleanup. View taken looking upstream.
June 3rd, 1933.
2239 First forms for Hoover Dam. View taken looking downstream. June 6th, 1933.
2210 Test of 150-ton Government...
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"1766 - 1767 Panoramic view of the Upper Cofferdam, looking downstream. November 26th, 1932.
1744 Lower Portals of Diversion Tunnels Nos. 3 and 4, after diversion of the Colorado River was completed.
November 14th, 1932.
1778 Upper...
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"1822 Placing concrete paving on the Upstream Cofferdam. December 20th, 1932.
1828 Site of Nevada Valve House, showing Construction Adit and 11-foot outlet tunnels. December 21st, 1932.
1786 Start of operations on driving of 18-foot Penstock...
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"2262 Hoover Dam. June 27th, 1933.
2256 Cut-off trench at upstream side of Hoover Dam. June 23rd, 1933.
2263 Hoover Dam. June 27th, 1933."
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"1450 Looking across the reservoir area, which will be submerged when Hoover Dam is completed. The flat-topped hill in the center of the picture will form a small island and the ridge in the foreground will be totally submerged. August...
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"1630 Bulkhead Gate during construction at Upper Portal of Diversion Tunnel No. 1. September 22nd, 1932.
1632 Bulkhead Gate during construction at Upper Portal of Diversion Tunnel No. I. September 28th, 1932.
1635 Bulkhead Gate...
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"1431 Excavation for benches for movable cableway towers being carried on, near Lookout Point. August 14th, 1932.
1442 ""Powder-monkeys"" load dynamite cartridges with electric primers at isolated points. August 15th, 1932.
1444 Workmen...
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