An Act to authorise the construction of works for impounding and distributing the waters of the Rivers Derwent and Ashop and their tributaries and to constitute a joint board representative of the Corporations of Derby Leicester Nottingham and Sheffield and of the County Council of Derbyshire for the purposes of such construction and to confer further powers in relation to the supply of water on the said Corporations and County Council and for other purposes.
An Act to authorise the Derwent Valley Water Board to construct new waterworks and to acquire lands to make provision for the protection of the gathering ground of the new waterworks to confer further powers upon the Board and for other purposes.
The board's works included the following reservoirs:
Howden, built 1901-1912, capacity 1,980 million imperial gallons (9,000,000 m3), formed by a masonry dam 117 feet (36 m) high and 1,080 feet (330 m) long.
Derwent, built 1902-1916, capacity 2,120 million imperial gallons (9,600,000 m3), formed by a masonry dam 114 feet (35 m) high and 1,110 feet (340 m) long.
Ladybower, built 1935-1945, capacity 6,310 million imperial gallons (28,700,000 m3), formed by an earth embankment 140 feet (43 m) high and 1,250 feet (380 m) long.
