This is the site of a swing bridge over the canal which has since been levelled with little or no trace remaining.
This can be viewed from the road between Smerrill and Ewen, close to the railway bridge that once carried the GWR branch line from Cirencester to Kemble.
(Tap / click images to enlarge)
Site of swing bridge, Ewen with canal passing left to right behind hedge
Ewen swing bridge site showing its proximity to the road
Ewen swing bridge site close to approach to former railway bridge