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160:. There is very little elevation change in the lock, which serves mainly to regulate water flow from Lake Michigan into the waterway. The dam is located in
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156:). T.J. O’Brien lock is the uppermost lock on the waterway, and there is not another barrier between the lock and
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152:. The dam is situated at river mile 326.5 on the Waterway (326.5 river miles up from the
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Calumet River (suba sa
Tinipong Bansa, Illinois, Cook County, lat 41,73, long -87,53)
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41° 39′ 07.55″ N, 87° 34′ 01.84″ W
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748:نهر كالوميت
554:1 June 1992
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
