Photos: (l) Closed sluice gate-tidal outfall into River Nene, England. (r) Mechanical winch used to open/close sluice gate. Surrounded on 3 sides by railing & water in background.

Figure 6. Image of a sluice gate in closed position (left), and an example of a winch used to open and close a sluice gate (right).

Photos: (l) Closed sluice gate-tidal outfall into River Nene, England. (r) Mechanical winch used to open/close sluice gate. Surrounded on 3 sides by railing & water in background.

Left photograph by Richard Humphrey (https://www.geograph.org.uk/photo/1973712); right photograph by Chad Poole.