Search for all of "Tunnels", all of "Hoover Dam ariz And Nev -- Design And Construction", all of "Diversion Tunnels"

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1. No. 1 and no. 2 tunnels
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2. Construction of diversion tunnels -- Hoover Dam site
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3. Partially washed-out truck bridge across from diversion tunnels
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4. Diversion tunnels during Hoover Dam construction
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5. Diversion tunnels under construction - Hoover Dam
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6. Diversion tunnel at Hoover Dam
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7. Looking up Black Canyon during construction of the diversion tunnels
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8. Looking up Black Canyon during the construction of the diversion tunnels
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9. Putting in the ceiling on the Nevada side of the no. 2 diversion tunnel
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10. Putting in the ceiling on the Nevada side of the no. 2 diversion tunnel
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11. Sidewall concreting in diversion tunnel no. 4 showing workers
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12. Lower portals of Diversion Tunnels No. 3 and No. 4, during the flood.
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13. Water flowing into Colorado River, June 16, 1933
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14. Trash rack at the upper portals of diversion tunnnel no. 2.
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15. Hoover Dam construcion -- blasting
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16. Workers in diversion tunnels -- Hoover Dam site
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17. Close-up of trimming jumbo
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18. Construction of Hoover Dam
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19. Six Companies' power shovel dumping dirt in dump truck in diversion tunnel at Hoover Dam...
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20. Construction of Hoover Dam
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21. Construction of Hoover Dam
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22. Crane transporting mixers in diversion tunnel at Hoover Dam site
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23. Looking across the river at the lower portal of Diversion Tunnel No. 3.
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24. Gas-air shovel caught in the flooded Colorado River
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25. Trash rack structure being installed in front of diversion tunnel no. 2
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26. Looking out of the interior of diversion tunnel no. 2, with gas-air shovel inside the...
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27. Workers and drilling jumbo inside diversion tunnel no. 4
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28. Close-up of workers using a drilling jumbo inside a diversion tunnel
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29. Construction worker in bulldozer in front of diversion tunnel portal
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30. Construction workers using a drilling jumbo inside a diversion tunnel
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31. Interior of diversion tunnel during Hoover Dam construction
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32. Forms for transition at the downstream plug of Diversion Tunnel No. 2.
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33. Aerial view of Hoover Dam construction site looking upstream on the Colorado River
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34. Upper portal trashrack for diversion tunnel no. 1, on the Nevada side.
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35. Diversion tunnel no. 2, showing the pumpcrete line to the upstream plug
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36. View of no. 4 plug, Hoover Dam site
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37. Construction inside tunnel, Hoover Dam site
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38. Interior of diversion tunnel showing pipe
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39. Interior of tunnel during Hoover Dam construction
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40. Interior of Hoover Dam diversion tunnel during construction
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41. Interior of diversion tunnel during Hoover Dam construction
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42. Diversion tunnel no. 1 trashrack and counterweight assembly just prior to the diverting of the...
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43. Diversion tunnel under construction - Hoover Dam
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44. Hoover Dam from the downstream side
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45. Hoover Dam from downstream side
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46. Outlet works -- Hoover Dam
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47. Construction of Hoover Dam
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48. Looking upstream at the upper end of no. 1 plug, showing forms for the intake...
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49. Looking upstream into no. 1 plug, showing the placing of the high pressure valves and...
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50. Construction -- Hoover Dam
 

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