1750. From 1762 it was a tilt forge making farming tools before becoming a wire mill in 1901. In the 1920s it was converted to electrical power. It was one of the last mills in the valley to close as it was still working in the 1950s. The area around the dam has been upgraded for recreational use with a small car park and bench seating. The dam is popular with anglers and has a large colony of waterfowl. Mousehole Forge Located close to Malin Bridge, the forge dates back to 1628 when it was known for iron smelting and bar production. However the forge became world-famous for producing anvils which were greatly commended and won a gold medal at The Great Exhibition of 1851. It is said that the anvil at Gretna Green was made by the Mousehole Forge. Production ceased in 1933 and part of the forge is now a private house. Grogham Wheel This was the last mill in the valley before the Rivelin's confluence with the River Loxley. It had two waterwheels, with the largest known as "Groggy" being the biggest in the valley. The mill ground files and cutlery and was the only one in the valley to be damaged by the Great Sheffield Flood due to the water backing up the valley. The mill stopped production in 1933 with the buildings being demolished in August 1935 for public safety. Wildlife The river valley is home to wildlife including mallard, the dipper, the kingfisher, the long-tailed tit, grey heron and the wren. At Fox Hagg nature reserve on the south side of the river it is possible to see meadow and tree pipits, common redstarts and linnets and a number of warblers. Rivelin Valley Road Rivelin Valley Road was built in 1907 between Malin Bridge and Rivelin Mill Bridge to connect with the main Sheffield to Manchester road, now the A57. Prior to this the valley had no road, just a series of cart tracks connecting the various industrial mills. The building of the road was proposed in 1905 by the local water board, which owned the land; the Duke of Norfolk also donated 4.5 hectares of his land in the area for the project. Work started in November 1905 and provided employment for 176 unemployed men. The unemployment rate was particularly high at the time and the opportunity to provide work was a contributing