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Filter: Subject of quarries and quarrying
Filter: Subject of technology
| Date: | 07 16 1912 |
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| Description: | Workers posing inside the coffer dam. The narrow gauge railroad is behind them. One of the pile drivers is in the background. A bare area on the bluff in t... |
| Date: | 10 12 1938 |
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| Description: | Men work with a Universal crusher, used to crush 400 yards of gravel in 8 hours. The crusher was powered by an International PA-100 power unit owned by E.F... |
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