Haweswater is a reservoir built in the valley of Mardale. The controversial construction of the Haweswater dam was started in 1929,
to supply water to the Manchester area. There was a public outcry in protest as the valley of Mardale was populated by farming villages
which would be flooded and lost, and the population would have to be moved. Nevertheless, the project went ahead and Haweswater
is now one of the largest lakes in the Lake District.