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There are two different figures for the length of the river in this article. The main text says 66 miles, while the Infobox says 50 miles. Which one is correct? --Drgkl (talk) 14:35, 1 December 2011 (UTC)
The explanation for some of this is Here but the bottom line says it all. Looking at the maps shows that they have included mill streams as well. Thought I would raise it here first, rather than simply change it. Jokulhlaup (talk) 18:27, 28 February 2013 (UTC)
The article infers that Arkwright's Cromford Mill was powered by the Derwent. Whilst it may be in the Derwent Valley I understand that it used the Bonsall Brook/Cromford Sough for power. Jokulhlaup (talk) 18:54, 26 February 2013 (UTC)
True. Do you want to change it then? The only ref I have at hand is the tourist board leaflet- do you haqve a better one? --ClemRutter (talk) 09:36, 27 February 2013 (UTC)b
Have changed it and added some additional info and refs. Reading the reference, I can see why the issue came up. Jokulhlaup (talk) 18:08, 28 February 2013 (UTC)