 The original reservoir at Leyland Brow proved insufficient for the town, and in 1898 Ramsden Reservoir was acquired along with the Todmorden Waterworks Company.As the town grew it was clear that a larger supply would be needed, and in 1923 Rochdale and Oldham County Boroughs jointly acquired the reservoirs of the Rochdale Canal Company.Watergrove Reservoir, near Wardle was constructed in 1938.