Bridge over the Mells River at Great Elm
|- right||Finger Stream, Whatley Brook, Nunney Brook|
|Cities||Gurney Slade, Mells, Great Elm, Frome|
|- elevation||2 m (7 ft)|
|- length||31 m (102 ft)|
|- location||Frome, Somerset, England|
Mells River also powered the Old Ironstone Works and several other mills set up by James Fussell III in 1744. It is now a 0.25 hectare biological Site of Special Scientific Interest, as it is used by both Greater and Lesser Horseshoe Bats.
Vobster Inn Bridge, which carries the lane over the Mells River, is dated 1764, and is Grade II listed. At Great Elm the Murtry Aqueduct, built around 1795, carried the Dorset and Somerset Canal over the river.
The river takes the outfall from Whatley Quarry. Downstream of the outfall is the Mells River Sink. This acts as a spring when the water table is high and as a sink into underground aquifers, through the Limestone, when the water table is low. Water tracing showed this to be part of an underground part of the river 2.5 kilometres (1.6 mi) long. Archaeological investigations found the remains of woolly rhinoceros bones and a 1st-century bronze broach.
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- "English Nature citation sheet". 2006. Retrieved 2006-07-25.
- Thornes, Robin (2010). Men of iron. The Fussells of Mells. Frome Society for Local Study. ISBN 978-0-9565869-1-9.
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- Stanton, W.I. (1982). "Mells River Sink: A spelaeological curiosity in east mendip Somerset". Proceedings of the University of Bristol Spelæological Society 16 (2): 93–104.