Continuing southwards, the river passes the gallops which are part of Coombelands Racing Stables, situated on the eastern bank, and Park Mount, a motte and bailey dating from the time of the Norman conquest. It is one of the best-preserved monuments of this type in south east England. The river is crossed by Stopham Bridge, a fine medieval stone bridge built in 1422-23. The centre arch was raised as part of the improvements made to the navigation in 1822. It is a Grade I listed structure, and also a Scheduled Ancient Monument. It was damaged by army lorries in the Second World War, but has been repaired, and the heavy traffic on the A283 road was diverted onto a new bridge just upstream of it in the 1980s.