What are the arches on a roman aqueduct used for?

Answer:
Arches were used to hold up the structure. The Romans found out that by using an arch they could build larger and stronger structures because the arch held the weight of the structure.
Contributor: Jponbac
First answer by Jponbac. Last edit by Jponbac. Contributor trust: 760 [recommend contributor recommended]. Question popularity: 1 [recommend question].