This large spill weir is on the south, or towpath, side of the canal just below Dock Lock. The weir drains surplus water from the canal into the adjacent Oldbury Brook.
At one time, Oldbury Brook flowed into the canal on the offside bank and then out again over this weir, thus providing a water supply to the canal at this point. When the canal was later infilled, just beyond the weir, the Oldbury Brook was put into its own channel, and no longer flows into the canal.
The weir incorporated a side paddle arrangement that allowed the level in the canal to be reduced by about two feet as necessary.
The weir surround is lined in both stone and brick, capped with moulded engineering brick.
The weir has been previously restored by Cotswold Canals Trust
(Tap / click images to enlarge)