The Metropolitan Washington Airports Authority (Airports Authority) is currently undertaking a capital improvement program, called d2, to provide new facilities and replace and upgrade existing aircraft, passenger, and support facilities at Washington Dulles International Airport.

Several separate studies look at the potential environmental impacts of three major proposed project groups: 1) a new concourse, a new airport passenger train system, and associated projects that will replace the existing Concourse C/D complex and the mobile lounge shuttles; 2) a replacement, modernized airport traffic control tower; 3) and two new runways and associated projects.

The studies are prepared in compliance with the National Environmental Policy Act (NEPA) of 1969, as amended, the regulations of the President's Council on Environmental Quality (CEQ) for NEPA compliance, and Federal Aviation Administration (FAA) Orders 1050.1E and 5050.4A. NEPA requires federal agencies to consider a wide array of potential environmental effects when proposing actions including: noise; compatible land use; social and socioeconomic characteristics; air quality; water quality; geology and soils; historic, architectural, archaeological, and cultural resources; biotic communities; endangered and threatened species; wetlands; floodplains; coastal zone management; coastal barriers; wild and scenic rivers; prime and unique farmland; energy; light emissions; visual aesthetics; solid waste, hazardous waste, and pollution prevention; and design, art, and architecture. These studies are decision-making tools that analyze the potential environmental effects of a proposed action and its alternatives and provide a forum to address both regulatory and public concerns.

Below are links to more specific information about each study impacting Dulles Airport and the current status.

COMPLETED STUDIES:

• Replacement Access for Sully Historic Site and for Metropolitan Washington Airports Authority Southern Parcel - Finding of No Significant Impact (FONSI)
  Published June 2007
• Dulles International Arrivals Building Expansion
  Completed May 2007
• Dulles Runways & Associated Projects Environmental Impact Statement
  Completed October 2005
• North Area Roadways Environmental Assessment
  Completed May 2005
• Dulles General Aviation Fixed Base Operator Facilities Expansion Study
  Completed April 2005
• Dulles Construction Service Road - Environmental Assessment - Finding of No Significant Impact (FONSI) (10.2 MB PDF, 187 pages)
  Completed August 2003
• Dulles Air Traffic Control Tower Environmental Assessment
  Completed May 2003
• Dulles Concourse and Related Projects Environmental Assessment
  Completed August 2002

A FEDERAL AVIATION ADMINISTRATION STUDY IMPACTING AIRPORTS IN THE REGION:

• Federal Aviation Administration Potomac Consolidated TRACON Project
  Completed May 2003

(This FAA study deals with four major airports: Washington Dulles International Airport, Ronald Reagan Washington National Airport, Andrews Air Force Base, and Baltimore-Washington International Airport.)