The 600 LF Anchorage Ted Stevens International Airport HDD Water Project included the installation of a new 12-inch diameter water main under the jet aircraft ramp between the North and South Terminals. Horizontal directional drilling was chosen to minimize disruptive excavation in the busy aircraft ramp area. The new water main was installed under a 3-foot thick concrete slab and under numerous communication and fuel line utilities. Drilling work was successfully completed in 2008.