So, this is all that can be seen today of a 200-foot long, 38-foot wide grid of wood, I think—at first I figured it was metal, but Nick Howes posted a historic photo on Twitter where the grid itself certainly looks to be made of timber—hidden completely by a simple build-up of silt.
Up until the year 2000, it had been in use since some time in the 1890s, I think. Grace's guide's copy of the Institution of Civil Engineer's obituary of John McCurrich certainly attributes the construction of a gridiron to him while he was Docks Engineer for Bristol, and he held that post from 1890 until his death in 1899.
GPS Coordinates:
51.44929, -2.62425
Location: Hotwells
