Although the Upper Valley has largely been flooded and has probably lost most of its early vegetation, it still retains some of its old character. It is an isolated spot and although Rochdale and its environs has grown, the valley is still part of the Moorland. It is referred to in its only known history as the outer reaches of civilisation. See map http://wikimapia.org/17503219/Naden-Higher-Reservoir
The three Naden reservoirs were built by the Heywood and Middleton Water Company in the middle of the nineteenth century. The final and largest reservoir, the Greenbooth, was completed in 1961 at a cost of over £2M. It entailed drowning the village of Greenbooth. The dam is 117 feet high and 1000 feet long. In 1983 it was reported to be sinking and was strengthened by 1986. It provided a further 1000M gallons of water for Heyworth and district.
Recently there have been major works on the three Naden upper dams which have been reduced to two.
The Valley below the dam is much gentler and retains some of its woodland passing through Ashworth and joining the Roche at Heywood.
The pictures below are from left to right;- The Head of the Valley, Greenbooth Reservoir looking North, The Brook below the Dam, South from the Dam, Naden Brook, Ashworth Church.