Sometimes, aqueduct engineers should carve a tunnel ... hard water and then haul the buckets out. Pressurized pipe (inverted siphon) When faced with a deep valley, Roman engineers should use ...

It will be remembered that the plans of the Catskill aqueduct include the construction of a huge siphon for carrying the water below the Hudson River at a crossing near Storm King Mountain.

The unique 12-mile-long Roman aqueduct is, however, probably the most important monument, since the last 1.2 miles of the ...