Video courtesy of CDM/HMM Joint Venture - For engineering enthusiasts and anyone who's interested in the mechanics of siphon construction, this animation shows exactly how the 110-ton, 300-foot-long tunnel boring machine will drill a distance of nearly two miles, 100 feet beneath the New York Harbor seabed. Find out more about the Staten Island Water Siphon project: http://www.nycedc.com/project/replacement-anchorage-channel-water-siphons