54°30′36″N 2°48′36″W / 54.510°N 2.810°W
Mardale /mɑːrdeɪl/ is a glacial valley in the Lake District, in northern England. The valley used to have a hamlet at its head, called Mardale Green, but this village was submerged in the late 1930s when the water level of the valley's lake, Haweswater, was raised to form Haweswater Reservoir by Manchester Corporation.[1][2]