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Filter: Subject of locks (hydraulic engineering)
| Date: | 1897 |
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| Description: | De Pere lock on the Fox River with a construction crew at work. This is the only wooden lock on the Fox River. |
| Date: | 10 11 1914 |
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| Description: | Elevated view looking east across the power house, lock, and uncompleted portion of the dam. The concrete plant is seen on the far bank. The rising water o... |
| Date: | 08 05 1962 |
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| Description: | Mr. Ortel, a United States Government lock-keeper at Appleton lock number one on the Fox River canal. Mr. Ortel is opening the sluice gates to allow water ... |
| Date: | 07 04 1954 |
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| Description: | Locktender Earl Wood swinging open the heavy lock gate for a speedboat operator passing through the lock on the Yahara River at Tenney Park. A sign above t... |
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