Category:Construction of the Hoover Dam

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English: Construction of Hoover Dam (Boulder Dam) in the 1930s.

Subcategories

This category has the following 6 subcategories, out of 6 total.

B

Babcock & Wilcox Co. plant at Hoover Dam construction site‎ (9 F)
Boulder City housing estate for Hoover Dam builders‎ (1 C, 39 F)

C

Construction of the intake towers at Hoover Dam‎ (13 F)

H

Hoover Dam construction equipment‎ (2 C, 17 F)

P

People associated with the construction of Hoover Dam‎ (5 C, 51 F)

U

U.S. Government Administration Building (Boulder City)‎ (14 F)

Media in category "Construction of the Hoover Dam"

The following 200 files are in this category, out of 202 total.

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Hoover Dam Diagram.png 2,517 × 1,986; 944 KB
Hoover-dam-contour-map.jpg 1,520 × 580; 355 KB
Hoover-summary-map.jpg 4,438 × 2,860; 910 KB
Kaufmanndam.jpg 469 × 324; 82 KB
Photographic copy of original construction drawing dated June 15, 1931 (from Record Group 115, Denver Branch of the National Archives, Denver). OWYHEE DAM; CONCRETE COOLING HAER ORE,23-NYS.V,1-177.tif 5,000 × 4,053; 19.33 MB
"A 2x6 inch sawed plank imbedded under the river fill gravel over the edge of the bench on the Nevada side of the... - NARA - 293850.jpg 3,000 × 2,084; 3.65 MB
"Apache Indians employed as high-scalers on the construction of Hoover Dam." - NARA - 293746.jpg 2,092 × 3,000; 2.66 MB
"Arizona intake towers location as seen from point on Nevada side upstream from Nevada spillway location.... - NARA - 293710.jpg 3,000 × 2,115; 3.68 MB
"Blasting operations below Lookout Point for Black Canyon Highway." - NARA - 293709.jpg 3,000 × 2,105; 3.52 MB
"Blasting operations in Arizona and Nevada intake tower locations." - NARA - 293748.jpg 3,000 × 2,101; 3.25 MB
"Bulkhead gate structure and trash rack structure at inlet portals of diversion Tunnel Nos. 4 and 3 as seen from the... - NARA - 293739.jpg 3,000 × 2,103; 3.62 MB
"Cleaning rock floor preparatory to pouring invert concrete in diversion tunnel No. 4. Tractor bulldozer in... - NARA - 293699.jpg 3,000 × 2,102; 3.32 MB
"Completed concrete tunnel lining near inlet portal of diversion tunnel No. 4. Coating of moisture reserving paint is... - NARA - 293692.jpg 3,000 × 2,102; 3.2 MB
"Detail of lower section of side-wall forms for lining diversion tunnels showing chutes through which concrete passes... - NARA - 293673.jpg 3,000 × 2,105; 3 MB
"Excavation and forms for tunnel plug in diversion tunnel No. 4." - NARA - 293696.jpg 3,000 × 2,116; 3.31 MB
"Excavation and forms for tunnel plug lining in diversion tunnel No. 4. The concrete face of the upstream 6' offset... - NARA - 293695.jpg 3,000 × 2,101; 3.05 MB
"Excavation for Arizona intake towers as seen from point upstream on Nevada side. A close inspection of photo will... - NARA - 293743.jpg 2,081 × 3,000; 3.53 MB
"Forms for trashrack structure in place at inlet portal of diversion tunnel No. 3. Port through which tunnel concrete... - NARA - 293646.jpg 3,000 × 1,924; 3.31 MB
"General view of operations in placing side-wall concrete in diversion tunnel No. 2. Note truck on floor in... - NARA - 293664.jpg 3,000 × 1,893; 2.9 MB
"Looking down into upper Cofferdam excavation from rim of Black Canyon on Arizona side. Canyon wall in foreground... - NARA - 293749.jpg 3,000 × 2,110; 3.7 MB
"Looking downstream into excavation for Arizona spillway." - NARA - 293740.jpg 2,092 × 3,000; 3.44 MB
"Looking downstream into excavation for Nevada spillway structure. Flat face of cut at far end of excavation marks... - NARA - 293650.jpg 2,119 × 3,000; 3.95 MB
"Looking downstream into excavation for Nevada spillway. Cableway runway location is marked by excavation and forms... - NARA - 293744.jpg 2,093 × 3,000; 3.64 MB
"Looking downstream into lower Black Canyon from point on Six Companies' construction road on Nevada side. Arizona... - NARA - 293635.jpg 3,000 × 2,092; 3.21 MB
"Looking downstream into open cut and excavation for Arizona spillway. Shovel is near location of inclined spillway... - NARA - 293668.jpg 3,000 × 2,096; 3.99 MB
"Looking downstream into open cut and excavation for Arizona spillway. Shovel is near location of inclined spillway... - NARA - 293669.jpg 3,000 × 2,098; 3.94 MB
"Looking downstream into the excavation for the Arizona spillway. High fill at left is runway for Six Companies'... - NARA - 293713.jpg 3,000 × 2,104; 3.78 MB
"Looking downstream into upper cofferdam excavation. Dike and constricted river channel at left." - NARA - 293750.jpg 3,000 × 2,104; 1.62 MB
"Looking downstream through Diversion Tunnel No. 2 showing completed concrete pour. Upper portion is painted with... - NARA - 293737.jpg 3,000 × 2,095; 2.92 MB
"Looking northeast into Hemenway Wash from Government Administration Building, Boulder City." - NARA - 293634.jpg 3,000 × 2,103; 3.07 MB
"Looking toward canyon through excavation of forebay at Arizona spillway. Cliffs on Nevada side seen in background... - NARA - 293670.jpg 3,000 × 2,099; 3.92 MB
"Lookout Point on rim of Black Canyon on Nevada side. Top of point will be removed to provide for movable tower... - NARA - 293708.jpg 3,000 × 2,114; 3.82 MB
"Nursery stock in heeling-in grounds at Boulder City, awaiting transplanting in permanent location." - NARA - 293617.jpg 3,000 × 2,022; 3.42 MB
"Operations at downstream end of foundation excavation. View looks downstream toward lower cofferdam." - NARA - 293845.jpg 2,073 × 3,000; 638 KB
"Operations at inlet portal of diversion tunnel No. 2. Invert concrete and trashrack transition base are seen." - NARA - 293643.jpg 3,000 × 2,097; 3.16 MB
"Operations on canyon walls" - NARA - 293874.jpg 1,905 × 3,000; 971 KB
"Operations on upper cofferdam construction, view looking toward Arizona abutment." - NARA - 293782.jpg 3,000 × 2,091; 957 KB
"Pot-hole development disclosed in middle gorge excavation of dam foundation." - NARA - 293846.jpg 2,119 × 3,000; 921 KB
"Pouring side wall concrete in diversion tunnel No. 4. In this instance two forms are in use with alternate... - NARA - 293698.jpg 3,000 × 2,120; 3.44 MB
"Preliminary cofferdam construction. River is diverted through Arizona side of channel by temporary cofferdams the... - NARA - 293736.jpg 3,000 × 2,098; 3.99 MB
"Pressure grouting jumbo in operation in Diversion Tunnel No. 4. Grout is mixed at location and impelled into the... - NARA - 293758.jpg 2,097 × 3,000; 651 KB
"Pressure structure cleavage developed along the walls of the canyon. This structure which produces thin slabs or... - NARA - 293851.jpg 3,000 × 2,103; 1.11 MB
"Scene at outlet portal of diversion tunnel No. 2 during flash flood of August 31, 1932. Workmen are installing high... - NARA - 293726.jpg 3,000 × 2,110; 3.59 MB
"Side-wall concrete forms in place in diversion tunnel No. 2. Truck with dump buckets seen in aisle under jumbo." - NARA - 293675.jpg 3,000 × 2,114; 3.13 MB
"Side-wall concrete forms in place in diversion tunnel No. 2. View from "raw" or unconcreted end of jumbo. Truck is... - NARA - 293662.jpg 3,000 × 2,105; 2.82 MB
"Side-wall concrete forms in place in diversion tunnel No. 4. See previous photographs for more complete description... - NARA - 293697.jpg 3,000 × 2,106; 3.34 MB
"Side-wall concrete in place in diversion tunnel No. 2 near inlet. Photo taken after fourteenth day after pouring... - NARA - 293667.jpg 3,000 × 2,110; 2.71 MB
"Side-wall concrete in place in diversion tunnel No. 2." - NARA - 293693.jpg 3,000 × 2,107; 3.27 MB
"Side-wall concrete in place in diversion tunnel No. 3. Two methods of wetting are shown. At right sprinkler system... - NARA - 293663.jpg 3,000 × 1,941; 2.7 MB
"Sidewall tunnel forms being utilized in forming bulkhead gate structure at inlet portal of Diversion Tunnel No. 1." - NARA - 293738.jpg 3,000 × 2,101; 3.89 MB
"Spoil trucks, 14-cubic yard capacity, dumping on high level Arizona spoil banks." - NARA - 293862.jpg 3,000 × 2,076; 1.03 MB
"Steel bulkhead & stoney gates" - NARA - 293875.jpg 1,913 × 3,000; 771 KB
"Steel frame carriage supporting form for 110 degree top-arch concrete in diversion tunnel lining. Note jacks and... - NARA - 293690.jpg 2,086 × 3,000; 3.44 MB
"Stoney gate at outlet portal of diversion tunnel No. 2 lowered during test." - NARA - 293841.jpg 2,075 × 3,000; 934 KB
"Stripping operations at Arizona gravel deposit. View looking downstream shows full depth of cut." - NARA - 293632.jpg 3,000 × 2,088; 3.33 MB
"Tamping concrete behind forms in placing side-wall concrete in diversion tunnel lining. Photo taken when pour was... - NARA - 293674.jpg 2,090 × 3,000; 2.84 MB
"Telephoto view of dam structure from control tower of 150-ton cableway." - NARA - 293949.jpg 3,000 × 2,121; 1.21 MB
"Temporary diversion dike being constructed upstream from cofferdam location. This structure was begun immediately... - NARA - 293771.jpg 3,000 × 1,832; 837 KB
"The first bucket of concrete grout is placed in Boulder Dam proper at 11-20 A.M. June 6, 1933. This 8-cubic batch... - NARA - 293882.jpg 3,000 × 2,106; 1.06 MB
"Top-arch form in position under portal of diversion tunnel No. 2. Forms of trashrack structure abutment are seen." - NARA - 293691.jpg 3,000 × 2,126; 3.7 MB
"Trench at upstream toe of Boulder Dam foundation, looking toward Nevada side from top of Arizona bench nearly on... - NARA - 293905.jpg 2,099 × 3,000; 1.07 MB
"Trimming jumbo being lowered into inclined spillway tunnel on Nevada side." - NARA - 293918.jpg 2,098 × 3,000; 993 KB
"Truck mounted drill rig used by Six Companies in upper portion of diversion tunnels. Rig is seen in the position in... - NARA - 293641.jpg 3,000 × 2,162; 3.43 MB
"Two and one-half cubic yard dragline excavator working in middle channel of foundation excavation. Photo shows type... - NARA - 293837.jpg 2,066 × 3,000; 870 KB
"Upstream heading in upper Arizona penstock header. Rails upon which drilling jumbo operates seen at either side." - NARA - 293853.jpg 2,106 × 3,000; 666 KB
"View at outlet portals of Nevada diversion tunnels during flash flood of August 31, 1932. The lower reaches of all... - NARA - 293725.jpg 3,000 × 2,102; 3.23 MB
"View looking east to show power house concrete blocks on the west side. The lower placing trestle crosses the power... - NARA - 294255.jpg 3,000 × 2,323; 1.19 MB
"View looking upstream into cofferdam area from overhead cableway showing cofferdam excavation and temporary earth... - NARA - 293764.jpg 3,000 × 2,087; 834 KB
"View looking upstream through Black Canyon showing condition at dam site prior to beginning of excavation of middle... - NARA - 293842.jpg 2,087 × 3,000; 938 KB
"View looking upstream through Black Canyon showing downstream cofferdam and rock backwash barrier. Excavation in dam... - NARA - 293823.jpg 3,000 × 2,100; 1.04 MB
"Water breaking through earth and rock fill dike at outlet portal of diversion tunnel No. 2 during flash flood of... - NARA - 293727.jpg 3,000 × 2,103; 3 MB
"Type of highway marker erected by the Automobile Club of Southern California throughout Boulder City and the Boulder... - NARA - 293678.jpg 2,082 × 3,000; 2.89 MB
Arizona end of upper cofferdam showing interlocking steel sheet-piling at toe of slope and forms for concrete... - NARA - 293783.jpg 3,000 × 2,090; 938 KB
Arizona Intake Towers 1933.jpg 906 × 683; 329 KB
Arizona Intake Towers 1934.jpg 939 × 716; 535 KB
Arizona Intake Towers Spillway 1934.jpg 648 × 853; 442 KB
Back side of upstream end of Arizona spillway showing buttresses for channel lining, view looks downstream - NARA - 293953.jpg 3,000 × 2,112; 999 KB
Blasting in Black Canyon - NARA - 293773.jpg 2,044 × 3,000; 743 KB
Boulder Canyon Outlet portal of diversion tunnel No. 2 showing Stoney gate steel in place above portal and form work... - NARA - 293802.jpg 2,093 × 3,000; 945 KB
Boulder Dam, detail of panel construction in overflow weir of Nevada spillway - NARA - 293899.jpg 3,000 × 2,106; 808 KB
Boulder Dam, looking into upstream end of Arizona spillway from point off river of center line - NARA - 293891.jpg 2,123 × 3,000; 1.17 MB
Boulder Dam, looking upstream through Nevada sillway. At left are seen two panels of the overflow weir under... - NARA - 293886.jpg 2,098 × 3,000; 1.06 MB
Boulder Dam, looking upstream through Nevada spillway channel from point on center line - NARA - 293898.jpg 2,100 × 3,000; 1.17 MB
Bulkhead gate structure at inlet portal of Diversion Tunnel No. 4. Semi-circular structure in front of portal is... - NARA - 293759.jpg 2,090 × 3,000; 898 KB
Buttresses and forms in channel lining on upstream curve of Arizona spillway - NARA - 293928.jpg 3,000 × 2,138; 789 KB
Classification of concrete aggregates - NARA - 293867.jpg 2,221 × 3,000; 1.1 MB
Completed tunnel lining at intake portal of Diversion Tunnel No. 4, view looking toward entrance. Pressure grouting... - NARA - 293757.jpg 3,000 × 2,114; 700 KB
Completed tunnel lining in Diversion Tunnel No. 4. Invert truck road has been removed disclosing full section - NARA - 293756.jpg 2,081 × 3,000; 636 KB
Concentration of excavating equipment working in dam substructure site. This shows six 3-1-2 yard shovels in the... - NARA - 293824.jpg 3,000 × 2,104; 938 KB
Concrete Control - NARA - 293865.jpg 1,894 × 3,000; 821 KB
Concrete gun carriage used in placing 110 degree top-arch concrete in diversion tunnels - NARA - 293688.jpg 2,081 × 3,000; 3.71 MB
Concrete gun carriage used in placing 110 degree top-arch concrete in diversion tunnels - NARA - 293689.jpg 2,085 × 3,000; 3.45 MB
Concreteworkers.jpg 1,600 × 1,280; 348 KB
Concreting operations in weir foundation at Nevada Spillway - NARA - 293822.jpg 3,000 × 2,097; 1,017 KB
Construction Intake Towers Hoover Dam 1934.jpg 933 × 698; 724 KB
Construction of Upper Cofferdam - NARA - 293871.jpg 1,890 × 3,000; 907 KB
Dam foundation excavation as seen from cableway skip at approximate elevation 1100. View looks upstream with... - NARA - 293906.jpg 2,108 × 3,000; 1.01 MB
Dam site and structure as seen from point on Arizona canyon rim roughly defined by coordinate point N 31,000, W... - NARA - 293950.jpg 2,103 × 3,000; 980 KB
Dam structure as seen from skip on 150-ton cableway. View is made on center line of structure from elevation 1000.... - NARA - 293948.jpg 2,102 × 3,000; 900 KB
Damforms.jpg 1,600 × 1,280; 330 KB
Damupstream.jpg 1,600 × 1,280; 359 KB
Detail in corner of column form showing vertical and horizontal keys with grout pipe and condulet grout outlets in... - NARA - 293920.jpg 3,000 × 2,092; 2.69 MB
Detail of buttresses and forms in channel lining forms, Arizona spillway - NARA - 293929.jpg 2,118 × 3,000; 770 KB
Detail of channel lining buttresses at upstream end of Arizona spillway - NARA - 293954.jpg 2,116 × 3,000; 847 KB
Detail of pot-hole erosion along the river gorge on the Nevada side just downstream from damsite proper. Note the... - NARA - 293848.jpg 3,000 × 2,058; 1.01 MB
Detail of reinforcement and formwork in panel of overflow weir, Nevada spillway, as seen from parapet of channel... - NARA - 293944.jpg 3,000 × 2,115; 1.05 MB
Diversion of Colorado River - NARA - 293872.jpg 1,964 × 3,000; 865 KB
Dragline excavator working in dam substructure excavation at approximate elevation 550. Note deposition of river... - NARA - 293825.jpg 3,000 × 2,099; 1.05 MB
Evaporation tower for Boulder Dam precooling system located on downstream cofferdam. View from Nevada outlet valve... - NARA - 293900.jpg 3,000 × 2,135; 966 KB
Excavation for Arizona intake towers nearly complete - NARA - 293806.jpg 2,109 × 3,000; 898 KB
Excavation for major structures - NARA - 293873.jpg 2,030 × 3,000; 907 KB
Excavation for Nevada canyon wall outlet works and conduits. View looks directly against canyon wall and shows the... - NARA - 293798.jpg 3,000 × 2,098; 1.01 MB
Excavation operations in deeper middle channel of foundation excavation - NARA - 293838.jpg 3,000 × 2,110; 1.13 MB
Excavation operations in middle gorge of foundation excavation - NARA - 293840.jpg 3,000 × 2,107; 1.04 MB
First 8-cubic yard batch of concrete being placed in Boulder Dam - NARA - 293883.jpg 3,000 × 2,115; 1,016 KB
First water to pass through diversion tunnels flowing from outlet portal of Diversion Tunnel. No. 3. This photo... - NARA - 293776.jpg 3,000 × 2,096; 853 KB
General view looking upstream of foundation excavation. Deeper middle channel is shown prior to any disturbance by... - NARA - 293839.jpg 3,000 × 2,099; 1.07 MB
General view of Black Canyon looking upstream toward damsite showing conditions immediately prior to diversion of... - NARA - 293763.jpg 2,086 × 3,000; 807 KB
General view of operations at dam site as seen from high-level suspension bridge swung between Triangulation Points... - NARA - 293916.jpg 2,107 × 3,000; 1.07 MB
Grouting crew at work on upper levels of Arizona abutment. The grout mixture is being introduced into 50-foot holes... - NARA - 293937.jpg 2,104 × 3,000; 835 KB
Heavy duty trucks handling material for downstream cofferdam fill - NARA - 293810.jpg 3,000 × 2,092; 1.03 MB
High scalers cleaning canyon wall above Nevada power plant site - NARA - 293863.jpg 2,092 × 3,000; 1,016 KB
High-scalers working on Arizona abutment - NARA - 293766.jpg 2,081 × 3,000; 874 KB
Hoover Dam 1934 (12664127905).jpg 1,023 × 819; 161 KB
Hoover Dam 1935.jpg 940 × 710; 313 KB
HooverDamConcrete.jpg 800 × 640; 196 KB
HooverDamConstruction.jpg 580 × 463; 83 KB
HooverDamPowerPlantConstruction.jpg 600 × 474; 90 KB
Inlet portal of Diversion Tunnel No. 3 - NARA - 293780.jpg 3,000 × 2,097; 675 KB
Inlet portal, Diversion Tunnel No. 4, showing bulkhead gate steel erected in structure - NARA - 293779.jpg 2,100 × 3,000; 834 KB
Inlet portals of Diversion Tunnels Nos. 3 and 4 showing diversion of river flow by temporary dike shown at right.... - NARA - 293767.jpg 3,000 × 2,101; 1,016 KB
Intake Tower Hoover Dam 1934.jpg 940 × 698; 518 KB
Intake Towers Hoover Dam Lake Mead 1935.jpg 915 × 689; 270 KB
Landscaping in Boulder City. - (1) Nursery block in 'heeling in' ground awaiting transplanting, (2) View of area... - NARA - 293876.jpg 1,880 × 3,000; 726 KB
Lining Diversion Tunnels - NARA - 293869.jpg 2,320 × 3,000; 962 KB
Lining Diversion Tunnels - NARA - 293870.jpg 1,927 × 3,000; 823 KB
Lo-Mix Concrete Plant - NARA - 293866.jpg 1,902 × 3,000; 799 KB
Looking across dam from upstream cofferdam. Note 8-foot wide slot through middle in which cooling system headers are... - NARA - 293919.jpg 2,092 × 3,000; 734 KB
Looking diagonally upstream across dam from Nevada side near downstream toe. Low blocks in lower left corner are 'L'... - NARA - 293931.jpg 3,000 × 2,120; 971 KB
Looking down into dam foundation excavation from lookout Point on the Nevada rim. This view shows excellently the... - NARA - 293860.jpg 2,084 × 3,000; 1.07 MB
Looking down into excavation for downstream Nevada intake tower. View shows circular excavation for intake tower... - NARA - 293952.jpg 3,000 × 2,113; 1.03 MB
Looking down into excavation for Nevada power house. View shows power penstock tunnels through which construction... - NARA - 293799.jpg 3,000 × 2,085; 922 KB
Looking down into lower cofferdam site from top of Nevada side. Material is being placed along entire longitudinal... - NARA - 293795.jpg 3,000 × 2,090; 994 KB
Looking down into upper cofferdam excavation from rim of Arizona side near Triangulation Point P-17. View shows... - NARA - 293770.jpg 3,000 × 2,102; 1,006 KB
Looking down on the inlet portals of Arizona diversion tunnels Nos. 3 and 4 from near the top of the Nevada canyon... - NARA - 293857.jpg 2,087 × 3,000; 934 KB
Looking down onto downstream rock backwash barrier. Construction road operates against Arizona abutment. - NARA - 293797.jpg 3,000 × 2,097; 1,002 KB
Looking downstream across dam from high level catwalk. Large block in foreground is J-1. - NARA - 293945.jpg 2,116 × 3,000; 1.02 MB
Looking downstream against upstream face of upstream cofferdam showing concrete surfacing in progress on Nevada end.... - NARA - 293794.jpg 3,000 × 2,083; 1.1 MB
Looking downstream into Black Canyon from point on Nevada side above outlet portals of diversion tunnels - NARA - 293754.jpg 2,091 × 3,000; 786 KB
Looking downstream into upper cofferdam excavation. Percolation stops seen at right against Nevada abutment. - NARA - 293768.jpg 3,000 × 2,082; 1.08 MB
Looking downstream into upper cofferdam operations along Nevada abutment. Note percolation stops and interlocking... - NARA - 293765.jpg 3,000 × 2,093; 818 KB
Looking downstream through Black Canyon. View shows downstream cofferdam and rock backwash barrier. Construction... - NARA - 293858.jpg 2,099 × 3,000; 766 KB
Looking upstream across Arizona spillway. Cableway tail towers and fill seen at left. - NARA - 293935.jpg 3,000 × 2,122; 1.15 MB
Looking upstream and across Arizona spillway. View shows construction of overflow weir and buttressed section of... - NARA - 293927.jpg 3,000 × 2,088; 946 KB
Looking upstream and across Arizona spillway. View shows construction on overflow weir and buttressed section of... - NARA - 293926.jpg 3,000 × 2,138; 1,013 KB
Looking upstream at downstream face of dam. Vertical forms for powerhouse footings intersect better forms of... - NARA - 293930.jpg 3,000 × 2,130; 844 KB
Looking upstream at Hoover damsite toward upper cofferdam across excavation for power house location - NARA - 293812.jpg 3,000 × 2,096; 1.06 MB
Looking upstream onto upper cofferdam operations from point on Arizona abutment. Fill is approaching maximum... - NARA - 293778.jpg 3,000 × 2,090; 917 KB
Looking upstream through Arizona spillway. In the upper right is seen the buttressed section of the side wall - NARA - 293925.jpg 2,125 × 3,000; 1,003 KB
Looking upstream through Black Canyon showing foundation excavation and construction installations on cofferdam... - NARA - 293836.jpg 2,107 × 3,000; 1,020 KB
Looking upstream through Black Canyon toward Hoover Damsite showing condition after diversion of Colorado River.... - NARA - 293793.jpg 2,087 × 3,000; 894 KB
Looking upstream through Black Canyon toward Hoover Damsite showing extent to which lower level of canyon is choked... - NARA - 293781.jpg 2,084 × 3,000; 809 KB
Looking upstream through Black Canyon toward Hoover Damsite. View showing condition of canyon prior to inauguration... - NARA - 293792.jpg 3,000 × 2,091; 809 KB
Looking upstream through Black Canyon. View shows upstream and downstream cofferdams with dam foundation excavation... - NARA - 293859.jpg 2,067 × 3,000; 1 MB
Looking upstream through Boulder Dam foundation excavation showing middle gorge and side benches - NARA - 293889.jpg 3,000 × 2,111; 895 KB
Looking upstream through channel of Arizona spillway - NARA - 293934.jpg 2,113 × 3,000; 1.07 MB
Looking upstream through channel of Nevada spillway. Overflow weir construction in progress at right - NARA - 293917.jpg 2,094 × 3,000; 1.18 MB
Looking upstream through foundation excavation at dam site and power plant location. View from suspension bridge at... - NARA - 293855.jpg 3,000 × 2,106; 1.05 MB
Looking upstream through Nevada spillway. Overflow weir under construction at right. Completed section of channel... - NARA - 293943.jpg 3,000 × 2,107; 958 KB
Looking upstream through the 'I' column forms along Arizona side of middle gorge. 'H' columns at right, 'J' columns... - NARA - 293922.jpg 2,086 × 3,000; 633 KB
Lower cofferdam operations as seen from Arizona outlet valve house location. Forms and excavations for percolation... - NARA - 293796.jpg 3,000 × 2,089; 1.15 MB
Native planting used in landscaping privately-owned business building (mortuary) - NARA - 293908.jpg 3,000 × 2,134; 639 KB
Native planting used to beautify street intersection - NARA - 293907.jpg 3,000 × 2,110; 808 KB
One of the hot springs issuing from a crevice in the side of a large pot-hole ten feet above the floor of the middle... - NARA - 293849.jpg 2,059 × 3,000; 780 KB
Panorama of canyon rim above Hoover damsite on the Nevada side. From left to right are seen, Operating tower for... - NARA - 293808.jpg 3,000 × 1,108; 894 KB
Panorama of upstream face of upstream cofferdam. Crest of fill at maximum elevation 720. Concrete surface in progress - NARA - 293790.jpg 3,000 × 1,507; 922 KB
Placing concrete in block at mid-section of dam. Eight-cubic yard bucket handled by overhead cableway is in use. - NARA - 293921.jpg 3,000 × 2,098; 867 KB
Placing concrete in Boulder Dam foundation, looking upstream through middle gorge - NARA - 293901.jpg 2,094 × 3,000; 883 KB
Placing concrete in column 'J'-4. Top of forms at elevation 575. View looks toward Arizona side - NARA - 293932.jpg 2,097 × 3,000; 912 KB
Placing concrete in panel forms near downstream toe in Boulder Dam foundation. An 8-cubic yard bottom-dump bucket... - NARA - 293903.jpg 3,000 × 2,105; 657 KB
Placing concrete in panel or column forms near downstream toe in Boulder Dam foundation. An 8-cubic yard bucket... - NARA - 293902.jpg 2,098 × 3,000; 626 KB
Placing concrete in sidewall forms of Nevada spillway of Boulder Dam. Concrete is being handled by crane in 2-cubic... - NARA - 293885.jpg 3,000 × 2,102; 1.24 MB
Placing concrete with 4-cubic yard transit mixer in column 'M'-13. Transit mixers are used where the small size of... - NARA - 293933.jpg 3,000 × 2,135; 609 KB
Pourdam.jpg 1,280 × 1,600; 346 KB
Catwalk spanning canyon over upstream cofferdam. The span is swung approximately between Triangulation Points C-7... - NARA - 293946.jpg 3,000 × 2,122; 872 KB
Dam site and structure as seen from point on Arizona rim roughly defined by coordinate point N31,000, W 48,700. View... - NARA - 293951.jpg 2,109 × 3,000; 1.02 MB
"Looking into Black Canyon at Nevada Diversion Tunnel intake portals from top of canyon wall on Arizona side. Trash... - NARA - 293671.jpg 3,000 × 2,101; 3.71 MB
"Looking upstream into Black Canyon toward Hoover Damsite from point on Six Companies Construction road on Nevada side." - NARA - 293720.jpg 3,000 × 2,095; 3.78 MB
Drillers and scalers at work in intake tower locations on Nevada side. Note five-yard dragline excavator in upper... - NARA - 293760.jpg 2,094 × 3,000; 916 KB
Looking upstream into Black Canyon toward Hoover Dam site showing outlet portals of four diversion tunnels and... - NARA - 293789.jpg 3,000 × 2,103; 909 KB
Looking upstream into Black Canyon toward Hoover damsite showing four diversion tunnel outlets - NARA - 293813.jpg 3,000 × 2,112; 1.01 MB
Looking upstream toward Boulder dam site showing outlet portals of all four diversion tunnels. Flow of Colorado... - NARA - 293890.jpg 3,000 × 2,127; 912 KB
View looking into Black Canyon from rim of the Arizona wall showing operations in the early stages of the upper... - NARA - 293735.jpg 2,090 × 3,000; 3.66 MB
Water flowing into inlet portal of Diversion Tunnel No. 4 about an hour after earth barrier had been removed by... - NARA - 293777.jpg 3,000 × 2,095; 3.3 MB
Theb1826 - Flickr - NOAA Photo Library.jpg 1,388 × 892; 548 KB
"Avenue of poplars on irrigated ranch in the vicinity of Hoover Dam." - NARA - 293639.jpg 2,081 × 3,000; 3.51 MB
"Home on irrigated ranch in the vicinity of Hoover Dam." - NARA - 293640.jpg 3,000 × 2,090; 3.24 MB
"Reservoir on irrigated ranch in the vicinity of Hoover Dam." - NARA - 293638.jpg 3,000 × 2,099; 3.37 MB
View showing conditions at outlet portals of Diversion tunnels Nos. 3 and 4 after diversion. Temporary backwash dike... - NARA - 293769.jpg 2,090 × 3,000; 904 KB
View showing conditions at outlet portals of Diversion tunnels Nos. 3 and 4 after diversion. Temporary backwash dike... - NARA - 293769.tif 2,090 × 3,000; 5.98 MB

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