Simpson Ground Reservoir is a reservoir in Cumbria, England, near the southeastern end of Windermere. It is located within a Forestry Commission conifer plantation, to the east of Staveley-in-Cartmel and provides fresh water supply for Grange-Over-Sands and the Haweswater aqueduct to Barrow.[1] The reservoir, which covers an area of 6.89ha, was established in 1957.[2] The reservoir, at an altitude of 193m (633feet), measures 455x, and has a capacity of 44 million gallons.[1] [2] A plaque near the bank commemorates the opening of the reservoir on 4 May 1957 by the Lancashire County Council.