File:Lock 5 detail upstream drop gate and winch ca 1900 on Chesapeake and Ohio canal.jpg
![File:Lock 5 detail upstream drop gate and winch ca 1900 on Chesapeake and Ohio canal.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Lock_5_detail_upstream_drop_gate_and_winch_ca_1900_on_Chesapeake_and_Ohio_canal.jpg/800px-Lock_5_detail_upstream_drop_gate_and_winch_ca_1900_on_Chesapeake_and_Ohio_canal.jpg?20160617202218)
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