The controversial construction of the Haweswater dam started in 1929 , after Parliament passed an Act giving the Manchester Corporation permission to build the reservoir to supply water for the urban conurbations of north - west England .
Haweswater is a reservoir built in the valley of Mardale .
The controversial construction of the reservoir dam started in 1929 , after Parliament passed an Act giving the Manchester Corporation permission to build the reservoir to supply water for the urban conurbations of north - west England .
Haweswater is a reservoir built in the valley of Mardale .