This is about halfway along the Gridiron. You'd sluice water back and forth from this point to rinse the silt off the Gridiron as part of its regular maintenance. This was still being done until around the year 2000, when it apparently became more trouble/cost than it was worth for the dwindling number of boats using it.
GPS Coordinates:
51.44890, -2.62385
Location: Hotwells
