A Lock
"Every time the boat passed through a lock, a boat captain put his life and livelihood in the hands of the locktender. The wooden lock gates were a delicate balance between safety and efficiency. They had to be light enough to allow one man to move them, yet strong enough to hold back 140,000 gallons of water. A skilled locktender could jedge and adjust the flow of water in or out of the lock to minimize the risk to boad and lock." It is locktenders' duties to pass all boats and floats through the lock.
"Every time the boat passed through a lock, a boat captain put his life and livelihood in the hands of the locktender. The wooden lock gates were a delicate balance between safety and efficiency. They had to be light enough to allow one man to move them, yet strong enough to hold back 140,000 gallons of water. A skilled locktender could jedge and adjust the flow of water in or out of the lock to minimize the risk to boad and lock." It is locktenders' duties to pass all boats and floats through the lock.
The Washington City Canal is currently a place to enjoy nature while the canal was the people's livelihoods in the 19th century. Many structures and bulidings are near the canal. The Wasghinton City Canal is basically man-made. The canal operated from 1815 to 1850s. Dams, lockhouses and aqueducts were used during the time. The canal was in disuse in the late 19th century. However, the structures are still existed.
-CL
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