Its source is at Pink Green (just inside Worcestershire) near Wood End; it then flows east into Warwickshire, close to Tanworth-in-Arden and on to Henley-in-Arden, where several changes to the original course of the river have been made in the past to prevent flooding.

Again this existed into the 20th century and is fondly remembered by older residents who used the mill pond as a swimming pool in summer, but again seems to have become disused by the second world war.

It is stated that it was modernised with a turbine rather than a wheel and the Spencer family, the owners, supplied high-class flour over a large area.

Hoo Mill in Haselor is also powered by the river between Great Alne and Alcester and is considered to be the most complete traditional water-mill in the area.

It still retains an internal waterwheel, which is still operational with a complete, but a disused set of corn milling machinery, including an unusual sack hoist system.