 Longovicium is also interesting in having a copious water supply, from two aqueducts, one of which was fed from an impounded source to the west.The dam harnessed the water of 21 springs and was high and in length, being stone faced and clay lined on the inside.Despite not being on the scale of those supplying cities, the Longovicium aqueduct was nevertheless a significant feat of engineering, being considered one of the best preserved aqueducts in Britain.