Derwent Valley Water Board

The Derwent Valley Water Board was constituted by the Derwent Valley Water Act 1899 (62 & 63 Vict. c. cclxix) to supply the cities of Derby, Leicester, Nottingham and Sheffield, and the county of Derbyshire, with water impounded by a series of reservoirs along the upper reaches of the River Derwent in the Peak District of Derbyshire.

The board's works included the following reservoirs:
 * Howden, built 1901-1912, capacity 1,980 e6impgal, formed by a masonry dam 117 ft high and 1080 ft long.
 * Derwent, built 1902-1916, capacity 2,120 e6impgal, formed by a masonry dam 114 ft high and 1110 ft long.
 * Ladybower, built 1935-1945, capacity 6,310 e6impgal, formed by an earth embankment 140 ft high and 1250 ft long.

The board was abolished in 1974 under the terms of the Water Act 1973 (c. 37) and responsibility for the works was transferred to the new Severn Trent Water Authority.