ownership as well as management of 5,600 acres (22.4 km2) of the lands west of an envelope DOT retained around Drury for possible future development or disposal be transferred directly to DEC, which has since made that portion Stewart State Forest. Stewart was one of the many regional airports to be used during the Emergency Ground Stop after the September 11th Attacks, taking in dozens of planes forced to land. The Drury Lane exit Simultaneously with the privatization, the state proceeded with long-held plans to build a new interchange on Interstate 84 at Drury Lane, which would also be widened. A four-lane east–west access road, International Boulevard, would also be created to better solve the airport's longstanding access problems (see below). Conveniently, the initial price tag, $35 million, was exactly the amount bid by National Express. The new exit, designated 5A, was opened in the fourth quarter of 2007. The new north–south route is now designated Route 747. Another complication emerged due to the proximity of the Catskill Aqueduct of New York City's water supply system to the exit; a proposed widening of Drury between the interstate and Route 17K would have required that a bridge be built over the aqueduct to protect it from the vibrations associated with heavy trucks, adding to the cost of the whole project. An alternative emerged during a value-engineering study of simply rerouting Drury to create another four-way intersection farther down 17K, which was ultimately done. Whether the properties along Drury could even be developed in any measure remains to be seen, as a good portion of that parcel is either wetlands or a trapezoid-shaped Runway Protection Zone in which the FAA mandates that nothing be built, and the remainder is land considered by conservationists to be the best land in the properties. SPARC, the Orange County Federation of Sportsmen's Clubs and the national Sierra Club filed a lawsuit in federal court alleging that required environmental reviews were not done or done improperly; that action tied up the exit's construction for awhile. In March 2005, an area slated for wetlands mitigation under the plans was found to harbor purple milkweed, a Species of Special Concern on the National Heritage Program's rare plant list. SPARC and its co-plaintiffs sought an injunction against further action such as the consideration of bids, yet that went ahead anyway. The controversy was settled by a deal announced on November