Search for exactly "Power shovels"

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1. Switchyard control circuit tunnel under construction -- Hoover Dam site
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2. Six Companies' power shovel dumping dirt in dump truck in diversion tunnel at Hoover Dam...
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3. Gas-air shovel caught in the flooded Colorado River
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4. Looking out of the interior of diversion tunnel no. 2, with gas-air shovel inside the...
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5. Electric shovel loading rocks into dump truck
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6. Worker sitting in dump truck being loaded by power shovel
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7. Construction of steel forms for the lining of the diversion tunnels
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8. Bucket skips being filled with "muck" from the deep inner gorge of Black Canyon.
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9. Construction crews in Boulder Canyon.
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10. Construction of diversion tunnels -- Hoover Dam site
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11. Cleanup site at lower portal of Hoover Dam
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12. Hoover Dam switchyard during construction
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13. Switchyard at Hoover Dam during construction
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14. View of switchyard at Hoover Dam site
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15. Hoover Dam from the Arizona side
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16. Hoover Dam construction -- spillway
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17. Overhead view of construction on the Arizona valve house
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18. Diversion of the Colorado River into diversion tunnel no. 1 as the gate on diversion...
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19. Crew operating construction equipment at Hoover Dam site
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20. Power shovel and trucks opening up an adit
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21. Telephoto view looking downstream into the Arizona spillway, showing the construction of the spillway bridge
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22. Inside a diversion tunnel -- Hoover Dam construction
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23. Workers in diversion tunnels -- Hoover Dam site
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24. Construction workers inside Hoover Dam diversion tunnel
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25. Colorado River -- Beginning construction -- Hoover Dam
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26. Work on cofferdam -- Hoover Dam
 

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