Morehall reservoir was constructed at the same time as Broomhead reservoir and finished in 1929. Construction had been planned earlier but was delayed by World War 1. Workers lived in the nearby Ewden village. The reservoir flooded a steep valley probably previously used as meadows. Legibility is invisible. The date of origin of the moorland is uncertain but it had probably developed in this area by the Roman period (see Bevan 2003 for discussion of environmental evidence in the area).