the river between Emmotland and the Humber, but the merchants of Hull were unhappy with this; eventually the river had free navigation, and goods could be carried on it without toll. The Arram Beck was also exempt from all tolls. It has remained free, except for 1 mi from the mouth, which is part of the Port of Hull and is under the control of Hull Corporation.

The outlet of the river onto the Humber is thought to have changed in the early medieval period. The original outlet has been identified at a place called Limekiln creek.