Rivelin Valley Conservation Group
Situated on a bend in the river just upstream of the Swallow mill dam, the curved weir is built of large pitched stones, now in fairly poor condition other than at the northern end. A modern shuttle gate controls water flow into the head goit – look out for the iron staples linking the lintel stones.
The Swallow mill dam still holds water but is heavily shaded with trees. The main overflow was rebuilt in 2002 (see photo on History page). Grooves for washboards (used to raise the water level) can be seen in the stonework on either side of the overflow. A second overflow, near the tail end of the Swallow mill dam, has a grill – this was built in the 1990s to help keep water moving through the mill dam. Water falls from the second overflow into a culvert under the path and then into the river.
The wheel pit and the line of the buildings can be made out amongst the vegetation; part of the stone floor is still in place and can be seen if not flooded.
A stone arch over the tail goit culvert (seen in the Chattle drawing – History page, and on the Wildlife page) is still in good repair and was reclaimed from the undergrowth by the RVCG in 2012. Old maps show that the long tail-goit originally joined the head goit of Plonk Wheel. Parts of the goit can still be seen alongside the footpath, with water finding its way across the path into the river in places. Some stones from the tail goit were apparently used to build the footpath for the nature trail in the 1960s.