Valehouse (or Vale House) Reservoir is a man-made lake in Longdendale in north Derbyshire, England.

[2] Valehouse, with a crest elevation of 503 metres (1,650 ft), is too low to supply water under gravity to the Mottram Tunnel, so could not be used as an impounding reservoir.

Vale House residents worshipped at the Ebenezer Methodist Chapel in Tintwistle (built in 1830), which was above the reservoir.

It was demolished in 1887[5] at the request of the Manchester to Sheffield Railway Company, who feared for the stability of their trains when all the passengers crowded over to one side of a carriage to see the chimney protruding from the waters of the reservoir.

The puddle trench was dug to a depth of 35 feet (11 m) to a layer of lower millstone grit, which rested on limestone shales, and a good watertight seal was easily achieved.