A tributary of the river Frome the river rises on Blacker’s Hill above Benter and Nettlebridge. It then flows in an easterly direction just south of Holcombe and Coleford and on through Vobster and Mells, Great Elm and the Vallis Vale where it is joined by the Nunney Brook. It joins the river Frome north of Frome Town.
This link provides details of the Mells River Sink
Image Gallery River Map Structures