This beautiful valley is characterised by its 3 principal reservoirs, which are surrounded by a tapestry of moorland, woodland and farmland accessible by numerous footpaths and bridleways.
The reservoirs were constructed by Oldham Corporation Waterworks, Piethorne, Kitcliffe, Hangin Lees and Norman Hill was built first. The Water Act 1870 obligated the company to build Ogden reservoir to compensate Piethorne Brook; work began in 1872 and Ogden was finished in 1878. The last reservoir to be built was Rooden, 1894 to 1901.
The Lime House was built during the construction of Piethorne Reservoir, around 1866. Lime was stored in the building and added to the main feeder stream to reduce the acidity of the water coming down off the moors, this building and simple procedure was the first treatment works built to treat drinking water in the local area.
- Nature reserve
- Environment trail