 It is at the top of the chain of reservoirs and was the first to be started, though, due to construction problems, it was the last to be completed.The Manchester Corporation Waterworks Act 1847 gave permission for the construction of the Woodhead and Arnfield reservoirs and the aqueduct of the Mottram Tunnel.The Manchester Corporation Waterworks Act 1848 allowed the construction of Torside and Rhodeswood Reservoir, and an aqueduct to convey the water from Rhodeswood to the Arnfield reservoir.