On the northern abutment of the bridge, the high water marks reached by floods since 1852 have been carved into the stonework.
This practice was started during the period when the Hethbeth bridge still existed, and those earlier marks were transferred onto the new bridge.
To enable a comparison to be made with the peak levels, a graduated series of heights in feet above sea level has also been added.

The highest flood mark is for the October 1875 flood, but the larger 1795 Candlemas flood, has been attributed with a height at the bridge of 24.55 metres (80.5 ft).
Normal water level which is controlled by Holmes Sluices some 4 kilometres (2.5 mi) downstream, is 20.7 metres (68 ft).
On the northern abutment of the bridge, the high water marks reached by floods since 1852 have been carved into the stonework. This practice was started during the period when the Hethbeth bridge still existed, and those earlier marks were transferred onto the new bridge. To enable a comparison to be made with the peak levels, a graduated series of heights in feet above sea level has also been added.
The highest flood mark is for the October 1875 flood, but the larger 1795 Candlemas flood, has been attributed with a height at the bridge of 24.55 metres (80.5 ft). Normal water level which is controlled by Holmes Sluices some 4 kilometres (2.5 mi) downstream, is 20.7 metres (68 ft).
Trent Bridge (bridge)