Butterley Reservoir is a reservoir located near Marsden, West Yorkshire, near the Peak District National Park boundary.[1] It was completed in 1906.[2] The reservoir is known for its long stepped spillway, which is grade II listed.[3][4]
The reservoir contains 1,607,385 cubic metres (56,764,300 cu ft) of water when full, and drains a catchment area of 1,583 hectares (3,910 acres).[5]