South of Raise the ridge swings a little to the west, crossing an unnamed col on the way to White Side. The eastern face of this ridge is gouged deeply by Kepple Cove, a corrie whose back wall is named Red Screes. Kepple Cove once contained an artificial tarn, although today the bed is merely marshy except after heavy rain. The water from the tarn was used in a hydroelectric scheme to drive electric winding gear at Greenside Mine. Commissioned in 1891, this was the first such system in the country. It continued in use until the night of 29 October 1927 when the Kepple Cove dam burst during a heavy storm, leaving an wide gap in the earthworks. The resulting wave passed down the valley and through Glenridding village, flooding buildings and causing extensive damage. The breached dam can still be seen today.