Upper derwent dam

Upper derwent dam

Upper derwent dam Derwent Dam Viewpoint, Hope Valley, United Kingdom Derwent Reservoir was opened in 1916., four years after the first reservoir, Howden Reservoir. Piped intakes from the rivers Ashop and Alport fed directly into the Derwent Reservoir but soon increased demand led to the building of a third and larger water supply - Ladybower Reservoir.