On 12/03/2012 22:22, John Walford wrote:
> There is another reasonably substantial Roman drain at Marcham, in Oxfordshire. It is a drystone construction, set underground, and runs for something like 200-300m (I don't have an accurate figure to hand). It seems to have been constructed to remove groundwater from the floor of an arena, and carry it downslope towards a nearby river.
> There are interim reports for the site at http://www.arch.ox.ac.uk/VRP1.html , and some of these mention the drain (see, for instance, 2007).
> I imagine that many other Roman sites would also have had substantial drains. Caerleon baths comes to mind as a possible example, although I'm not sure how long the drain was in that case.
There are two Roman culverts/drains running from a pond above the mine
site at Dolaucothi in Carmarthenshire. See Wikipedia
look for 'Goldwashing cascade at Ogofau'
I photographed them with the help of Oscar, a grandson last year. See