Currently regenerating as part of a local nature reserve this polygon includes two relict water powered sites. Carr Forge is know from 1795 as 'William Inkersall's Scythe Wheel (Mosborough parish file). Buildings on this site were demolished c1953 but the dam and goits remain water holding. Rainbow Forge was built "soon after 1799" as "New Sickle Wheel" by George Shephard (ibid.). The site was in operation as a tilt forge and wheel until c1871. The dam was retained as a water supply for the nearby Birley East Pit. The dam burst in 1926 flooding the Shirebrook Valley but the dam was rebuilt and continued to hold water until the 1950s. Buildings demolished 1945. Dam remains as earthwork but is no longer watertight. Significant legibility of both the relict earthworks and goit system as well as of overgrown post-medieval strip enclosure boundaries.