History
“A storm water drainage system in the North of Sheffield. The section reported here is approximately one kilometre in length, leading from the outfall into the Don to the drain’s main feature – a large waterfall. Parts of this system were built towards the end of 1952, with some sections possibly being older.”
Source: https://www.28dayslater.co.uk/threads/transmission-ssfd-sheffield-january-2019.116183/