The River Wey is a chalk stream flowing through Dorset in south west England.

All five of the millers needed carefully to co-ordinate their activities to ensure a reliable flow of water.

There is a large pumping station at Friar Waddon, drawing from the source of the Wey, which is the main water supply for the Isle of Portland.

[2] The river is important for wildlife; Radipole Lake is a national nature reserve run by the Royal Society for the Protection of Birds.

The spring water of the Wey is used by the Upwey fish farm, which also uses the river to grow watercress.