The Draft Environmental Impact Study (DEIS) for Gateway tunnels was issued in June 2017. Four alternatives for alignments under the Hudson River and the Palisades. Option 1 would have the new tunnels run close to the existing tunnels with a ventilation site near the Lincoln Tunnel Helix. This option would have required a construction staging site within the Lincoln Tunnel Helix, thus displacing New Jersey Transit's Weehawken bus storage site, which would have a negative impact on the operation of buses to the Port Authority Bus Terminal. Option 2 would have the new tunnels run further south than the first option, with a shaft site north of 19th Street near JFK Boulevard East. This option would require the acquisition and demolition of an existing multi-story office building to build the shaft site. The third option would be further south with a shaft site south of 19th Street. This option would preclude the development of a portion of a planned residential development under construction at 800 Harbor Boulevard. The fourth option would be further south with a shaft site south of 18th Street–following the same horizontal alignment identified in the ARC FEIS. Alignment Option 4 was chosen for the build alternative even though it would have a slightly longer tunnel than in the other alternatives. Because of the additional length, there would be additional tunneling costs for this option. However, the first three options have greater pre-construction risks, meaning that if construction was delayed the cost difference would be minimized. In addition, Option 4 does not have the issues that the first three options have.