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| Date: | 1958 |
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| Description: | Construction workers O.R. Williams, Fred Mappin, and Rober Garner at the site of the Mammoth Pool Dam on the San Joaquin River in the Sierra Nevada Mountai... |
| Date: | 03 1932 |
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| Description: | Two International trucks exit a tunnel on a dirt road leading through a canyon during the construction of the Hoover Dam. Two men stand on the top of a squ... |
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