 Unlike the other reservoirs in the chain, Arnfield and Hollingworth Reservoir are not in the Etherow valley but lie in the valley of tributary brooks to the north and above (Arnfield lies around 1 mile from Bottoms Reservoir in the Longdendale Chain).From Arnfield the water is extracted to pass through the Mottram Tunnel to Godley.The Manchester Corporation Waterworks Act 1847 gave permission for the construction of the Woodhead, Arnfield and Hollingworth Reservoirs and an aqueduct to convey waters to a service reservoir at Godley.