Used extensively by the Romans, it's a bridge built to transport water, not people
[DOC] [TLE] Roman Engineering - Ancient History Encyclopedia [PAR] Mar 1, 2016 ... Roman Bridge, Ponte da Vila Formosa, Portugal (Carole Raddato) ... improving 
the daily lives of Romans and helping Rome maintain its dominance in ... Other 
innovations included the use of arcades to transport water over valleys ...