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"The initial scheme opened in 1906 with two 42in-diameter pipes. Two more pipes of 60in diameter were added between 1919 and 1961" from [http://en.wikipedia.org/wiki/Elan_aqueduct]. Another point not mentioned there, is that the Severn crossing is the lowest point and has the highest pressure on the entire 73 miles. --[[User:Graham Phillips 110|Graham Phillips 110]] ([[User talk:Graham Phillips 110|talk]]) 17:50, 17 January 2015 (UTC)
That's the Elan Valley Aqueduct which passes under the railway nearby but isn't actually listed as a bridge or culvert. Trimpley Pipe Bridge passes over the railway and carries a single pipe. I have a photo but it needs scaling down before I can upload it to the wiki! --[[User:WillSalt|WillSalt]] ([[User talk:WillSalt|talk]]) 18:09, 17 January 2015 (UTC)
Sorry, I had the current engineering works on my mind an didn't read the question properly. --[[User:Graham Phillips 110|Graham Phillips 110]] ([[User talk:Graham Phillips 110|talk]]) 20:31, 17 January 2015 (UTC)
