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![Scene at outlet portal of diversion tunnel No. 2 during flash flood of August 31, 1932. Workmen are installing high pressure pumps and strengthening dikes. Note water pouring through earth and rock Scene at outlet portal of diversion tunnel No. 2 during flash flood of August 31, 1932. Workmen are installing high pressure pumps and strengthening dikes. Note water pouring through earth and rock](https://c8.alamy.com/comp/W5XT1A/scene-at-outlet-portal-of-diversion-tunnel-no-2-during-flash-flood-of-august-31-1932-workmen-are-installing-high-pressure-pumps-and-strengthening-dikes-note-water-pouring-through-earth-and-rock-barrier-at-right-scope-and-content-photograph-from-volume-two-of-a-series-of-photo-albums-documenting-the-construction-of-hoover-dam-boulder-city-nevada-W5XT1A.jpg)