2015 Annual Aircraft Noise Report Ronald Reagan Washington National Airport Washington Dulles International Airport

Reagan National

Dulles International

flyreagan.com

mwaa.com

flydulles.com

Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Ronald Reagan Washington National Airport (DCA) 2015 Outreach Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Community Noise Working Group . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Arrival and Departure Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 D.C. Metroplex: Standard Arrival and Standard Instrument Departure Procedures . . . . . . 9 Runway Utilization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Typical Daily Flight Track Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Daily Average Operations by Hour. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Quarterly Track Density Plots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Arrivals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Departures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Aircraft Fleet Mix Percentages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 DCA Nighttime Noise Rule: History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Enforcement Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Violations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Noise Monitors: Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Noise Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Noise Complaint Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Washington Dulles International Airport (IAD) 2015 Outreach Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Arrival and Departure Routes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 D.C. Metroplex: Standard Arrival and Standard Instrument Departure Procedures . . . . . 32 Runway Utilization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Typical Daily Flight Track Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Daily Average Operations by Hour. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 Quarterly Track Density Plots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Arrivals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Departures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 Aircraft Fleet Mix Percentages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Noise Monitors: Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 Noise Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 Noise Complaint Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

2015

mwaa.com

1

Introduction Ronald Reagan Washington National Airport (Reagan National) and Washington Dulles International Airport (Dulles International) are the only two commercial airports in the United States that are owned by the federal government. The Metropolitan Washington Airports Authority (Airports Authority) is a regional organization established by the U.S. Congress to operate both airports on behalf of the federal government. Reagan National and Dulles International airports together serve more than 44 million passengers each year. Approximately 800 commercial aircraft operate at each airport per day. In addition to commercial flights, numerous general aviation and military aircraft operate in the greater Washington area, which makes the Capital region one of the busiest airspaces in the country.

The Airports Authority does not control or regulate airspace, aircraft operations, aircraft noise levels, airline schedules, airline fleet mix or local land-use zoning.

 The federal government has exclusive sovereignty of U.S. airspace. The only federal restrictions

   

imposed on commercial aircraft operating over populated neighborhoods include: o Minimum Altitudes: This restriction does not apply to arriving and departing aircraft. o Federal Prohibited Airspace: White House, U.S. Naval Observatory and U.S. National Mall. The Federal Aviation Administration (FAA) is solely responsible for managing the National Airspace System including all aircraft flight paths and altitudes. The Airport Noise and Capacity Act of 1990 limits U.S. airports from imposing new noise-based operational restrictions on quieter (stage 3) aircraft, including airport hours of operation, number of aircraft operations or aircraft noise levels. Airlines are responsible for managing their individual flight schedules and aircraft fleet mix. Local government jurisdictions are responsible for all land-use zoning around airports.

In addition to operating both airports, the Airports Authority oversees two key regional transportation programs: the design and construction of the Metrorail Silver Line extension and the operation and maintenance of the Dulles Toll Road. A recent regional Economic Impact Study estimates these combined transit services account for 4.5 percent of the regional gross domestic product. The Airports Authority’s operations directly support more than 387,000 jobs, $15 billion in labor income, over $20 billion in annual business revenue and $3 billion in state and local taxes (Figure 1). 2015

Figure 1: Economic Impact Study

mwaa.com

2

Introduction Continued Although air travel is an essential element of the metropolitan Washington economy, aircraft noise can disturb residents living near airport flight paths, particularly during early morning and late-night hours. This is especially true in densely populated neighborhoods adjacent to Reagan National’s flight paths along the Potomac and Anacostia Rivers and housing developments constructed near Dulles International’s runways. Recently, Reagan National and Dulles International have experienced an increase in aircraft noise complaints; subsequently, several key issues have been identified: 

Reagan National - Increased Travel Demand: An increase in demand for early morning and late-night travel has resulted in more arrivals and departures between 10 p.m. and 7 a.m. The change has prompted additional complaints from residents who live near the flight paths in the Washington, D.C., Maryland and Virginia.



Dulles International – Encroaching Housing Developments: An increase in housing construction near flight paths and runways has resulted in additional complaints from residents.



D.C. Metroplex - Procedure Changes: FAA continues the implementation of its Next Generation Air Transportation System program (NextGen) to improve airspace safety and efficiency, including new arrival and departure procedures in the D.C. airspace (D.C. Metroplex). Procedure changes have resulted in additional complaints from Reagan National and Dulles International residents.

The Airports Authority operates a Noise Information Office to address aircraft noise concerns and explain the facts, science and regulations related to aircraft noise. When public concerns arise over these issues, the Airports Authority’s management and Noise Information Office meet with individuals, groups, elected officials, airline representatives and the FAA to discuss airport operations and potential mitigation measures. In 2015, the Airports Authority continued to work with the FAA, airlines and community stakeholders to identify procedures with the potential to mitigate aircraft noise in neighborhoods near Reagan National and Dulles International airports. The 2015 Annual Aircraft Noise Report includes Outreach Summary, Flight Operations, Noise and Complaint data for each airport.

2015

mwaa.com

3

Introduction Continued For more information about the Airports Authority and aircraft noise, please visit:   

MWAA Reagan National Dulles International

Disclaimer: The data contained within the 2015 Annual Aircraft Noise Report is a public resource of general information. The Noise Information Office strives to provide highly accurate data; however, due to the large quantity of processed data, the Airports Authority shall assume no liability for: 1. Any errors, omissions, or inaccuracies in the information; 2. Any executed/non-executed decisions based on information provided hereunder.

2015

mwaa.com

4

Reagan National (DCA) 2015 Outreach Summary The Airports Authority continued its outreach to industry stakeholders in response to community concerns regarding aircraft noise along the Potomac and Anacostia Rivers. The river corridors have been the recommended flight paths since jets began operating at the Reagan National in 1966. Due to natural curves in the rivers, weather, aircraft technology and flight crew experience, it can be challenging for aircraft to maintain alignment with the center of the rivers. During 2015, the Airports Authority worked with the FAA and the airlines to maximize aircraft time over water and minimize aircraft time over land. The process revealed that one airline had modified an approach procedure in 2014 that resulted in additional time over land when the airport was operating in south flow (arrivals from the north and departures to the south). The Airports Authority brought the issue to the airline’s attention, and the airline returned to its original procedure. Two approach procedures were successfully modified to improve aircraft time over water: 

Required Navigation Performance (RNP) Runway 19 Approach: Approach procedure when the airport is operating to the south in instrument meteorological conditions (“bad” weather).

o

Old RNP RWY 19 Approach:

New RNP RWY 19 Approach:

 Procedure: o Fly to HIXIT navigational waypoint; o Follow 143°magnetic heading (radial) over Virginia from HIXIT to SETOC navigational waypoints; o Follow remaining navigational waypoints aligned with Potomac River.

2015

 Modified Procedure: o Fly to FERGI navigational waypoint; o Follow remaining navigational waypoints aligned with Potomac River.

mwaa.com

5

Reagan National (DCA) 2015 Outreach Summary - Continued 

River Visual Runway 19 Approach:

Preferred approach procedure when the airport is operating to the south in visual meteorological conditions (“good” weather).

o

New River Visual RWY 19 Approach:

Old River Visual RWY 19 Approach:  Procedure provided three arrival options: 1. Visually follow the Potomac River (preferred). or 2. Follow 148°magnetic heading (radial) over Virginia, until abeam of Georgetown Reservoir, then visually follow Potomac River. or 3. Follow localizer instrument approach over Maryland/D.C. until abeam of Georgetown Reservoir, then visually follow Potomac River.

2015

 Modified procedure provides two arrival options: 1. Visually follow the Potomac River (preferred). or 2. Follow modified Required Navigation Performance (RNP) Runway 19 Approach to SETOC navigational waypoint abeam of Georgetown Reservoir, then visually follow Potomac River.

mwaa.com

6

Reagan National (DCA) Community Noise Working Group A Reagan National Community Noise Working Group (Working Group) was established in October 2015 to engage broad-based stakeholder participation to identify practical aircraft noise mitigation measures and to formulate mitigation recommendations to the FAA for its consideration. The Working Group is comprised of Reagan National stakeholders representing regional communities along the Potomac and Anacostia river corridors, as well as airlines serving the airport. The Working Group voting members include 12 community representatives appointed by their local elected officials, and two airline representatives.    

Airlines: D.C.: Maryland: Virginia:

American Airlines, Metropolitan Washington Airlines Committee Wards 2, 3, 6, 7, 8 Montgomery County - District 1, Prince George’s County - District 8 Arlington County - North and South, City of Alexandria, Fairfax County - Dranesville and Mount Vernon Districts

The Airports Authority serves as the facilitator for Working Group meetings and recommendations. The Airports Authority and FAA serve as non-voting, advisory Working Group members. The Airports Authority forwards recommendations to the FAA for consideration after they have been approved and endorsed by a Working Group majority. 2015 Working Group Agenda Items:     

D.C. Metroplex Operations North and South Flow Operations LAZIR Standard Instrument Departure Procedure Runway 19 Approaches Noise Monitoring System

2015 Working Group Recommendations to FAA: 

Recommendation #1: Adjust navigational waypoints along LAZIR flight path procedure with the goal of maximizing the time aircraft spend flying directly over the Potomac River and minimizing the time aircraft spend flying over land. Proposed LAZIR Option “B”, presented by the FAA to the Working Group, was determined to be the most viable alternative. •

2015

•

ADAXE to BEBLE Simulated Tracks

mwaa.com

BEBLE to COVTO Simulated Tracks

7

Reagan National (DCA) Arrival and Departure Routes The D.C. airspace is unique within the FAA’s National Airspace System because of prohibited airspace (P-56) located 1.5 nautical miles north of Reagan National. The airspace consists of two subareas (Figure 2):  

Figure 2: Prohibited Airspace, P-56 A/B

P-56A: U.S. National Mall and the White House, home of the U.S. President. P-56B: U.S. Naval Observatory, home of the U.S. Vice President.

P-56B

P-56A

The FAA and U.S. Secret Service enforce P-56 and investigate all violations. Penalties may include revocation of the pilot’s license and/or jail. At Reagan National, a key FAA strategy for limiting aircraft noise exposure over the broader region is to maximize aircraft movements over water and minimize movements over communities. Arrival and departure procedures generally position aircraft over the Potomac and Anacostia River corridors, while avoiding P-56.

Another influence on Reagan National operations is FAA’s Next Generation Air Transportation System program (NextGen DCA). NextGen’s objective is to improve air travel safety and efficiency by redesigning the airspace, improving the collection/distribution of air traffic data, and introducing performance-based satellite navigation. In the D.C. Metroplex, several new satellite navigation Standard Arrival (STAR) and Standard Instrument Departure (SID) procedures were implemented throughout 2015. All aircraft movements are controlled by the FAA, including the operational direction - North Flow or South Flow. As a safety factor, aircraft arrive and depart into the wind to maximize aerodynamic lift. FAA uses Air Traffic Control reports, pilot observations, and National Weather Service data to determine airfield and enroute wind/weather conditions as the primary basis for directional flow. 2015

mwaa.com

8

Reagan National (DCA) D.C. Metroplex (NextGen): Standard Arrivals and Standard Instrument Departures DCA Standard Arrivals (STARs - blue) and Standard Instrument Departures (SIDs - red) (Figures 3 – 4). Figure 3: DCA North Flow STARs AND SIDs1

Figure 4: DCA South Flow STARs AND SIDs1

1

Source: FAA, PBN Programs and Policy Group, 09 Mar 2016

2015

mwaa.com

9

Reagan National (DCA) Runway Utilization During 2015, there were no significant changes in runway utilization from the previous year. Figures 5 - 6 provide approximate arrival and departure runway utilization percentages. In 2012, FAA Order 5200.8 mandated all U.S. airports, certificated under “14 Code of Federal Regulations Part 139, Airport Certification,” conform to the Runway Safety Area Program (RSA) requirements by December 31, 2015. RSAs are designated areas around a runway to minimize the risk of damage in the event an aircraft undershoots, overruns or veers off a runway. At Reagan National, RSA construction for Runway 4/22 began on January 19, 2014, and continued through 2015. 

2015 Runway Construction Closures: 4/22

Figure 5: DCA Runway Utilization 1.3% Arr RW15

- Arrivals

Figure 6: DCA Runway Utilization

36.4%

1.5%

Arr RW19

- Departures

61%

Dep RW33

Dep RW1

15

15

19

19

99

33

0% Arr RW22

0% Dep RW4

22

22

33

33 3.2%

6%

Dep RW15

Arr RW33

4

4

1

0%

0%

Dep RW22

Arr RW4

1 34.3% Dep RW19

56.3%

Arr RW1

2015

mwaa.com

10

Reagan National (DCA) Typical Daily Flight Track Map On a typical day, approximately 4,000 aircraft operate in the metropolitan Washington airspace. Aircraft operate to/from more than a dozen airfields including commercial, general aviation and military:  Commercial: Reagan National, Dulles International, Baltimore-Washington International  General Aviation: College Park, Leesburg Executive, Manassas Regional, Montgomery Air Park  Military: Andrews Air Force Base, Ft. Belvoir-Davidson Army Airfield, Joint Base Anacostia-Bolling, Quantico Marine Corps Airfield In 2015, Reagan National experienced a daily average of 397 arrivals and 393 departures. Figure 7 depicts typical, mixed flow Reagan National arrivals (blue) and departures (red) during a 24-hour period. Overflights (green) are aircraft operating in the airspace but not at Reagan National. Figure 7: DCA Typical Daily (24-hour), Mixed Flow Operations

DCA

October 9, 2015: Arrivals (413), Departures (399), Overflights (2833)

2015

mwaa.com

11

Reagan National (DCA) Daily Average Operations by Hour In 2015, Reagan National experienced a daily average of 397 arrivals and 393 departures. Figure 8 provides the daily average arrival and departure counts by hour. Figure 8: DCA Daily Average Operations by Hour DCA 2015 Daily Average Arrivals and Departures by Hour 60

Daily Average

50

40

30

20

10

0

0a

1a

2a

3a

4a

5a

6a

7a

8a

9a

10a

11a

12p

1p

2p

3p

4p

5p

6p

7p

8p

9p

10p

11p

Arrivals

3.0

0.7

0.3

0.1

0.0

0.1

6.5

19.2

19.3

23.4

23.8

20.6

23.4

26.3

26.2

23.3

28.3

20.5

27.1

22.2

24.2

25.8

20.6

12.2

Departures

0.8

0.2

0.0

0.0

0.0

2.6

20.0

23.0

26.4

25.5

28.3

24.1

23.3

18.8

24.5

28.4

21.2

28.6

21.0

21.4

24.5

9.9

16.3

4.0

Hour

2015

mwaa.com

12

Reagan National (DCA) Quarterly Track Density Plots A Track Density Plot graphically illustrates the frequency of aircraft movements over a defined area during a specified time period. It is an effective method to show arrival and departure corridors, or changes in flight procedures. A regional grid map is defined and each grid is color-coded based on the number of times (frequency) an aircraft passed through that grid (Figure 9). The 2015 DCA Quarterly Track Density Plots illustrate Reagan National flight procedures in the D.C. Metroplex including changes associated with NextGen:  

Figures 10 – 13: Arrivals Figures 14 – 17: Departures

Figure 9: Track Density Grid Colors based on Aircraft Frequency Count

2015

mwaa.com

13

Reagan National (DCA) Quarterly Track Density Plots – 2015 Arrivals Figure 10: 1st Quarter

Figure11: 2nd Quarter

Figure 12: 3rd Quarter

Figure 13: 4th Quarter

2015

mwaa.com

14

Reagan National (DCA) Quarterly Track Density Plots – 2015 Departures Figure 14: 1st Quarter

Figure 15: 2nd Quarter

Figure 16: 3rd Quarter

Figure 17: 4th Quarter

2015

mwaa.com

15

Reagan National (DCA) Aircraft Fleet Mix Percentages The Airports Authority maintains an open dialog with all airlines operating at Reagan National and encourages them to operate quieter aircraft types. Figures 18 - 20 show the average annual fleet mix percentages by aircraft type.

Figure 19: DCA Top 25 Fleet Mix

Figure 18: DCA Annual Average Fleet Mix by Aircraft Type

Aircraft

Aircraft

Type

Category

A319

Narrowbody Jet

A320

Narrowbody Jet

5.7%

6.1%

5.0%

4.4%

GLF5

0.1%

A321

2012

2013

2014 2015

DCA 2015 Top 25 Aircraft Types

12.4% 12.3% 11.9% 11.3%

Narrowbody Jet

0.2%

0.9%

0.3%

0.7%

B737-300

0.1%

B717-200 Narrowbody Jet

2.4%

2.5%

1.8%

0.3%

E135

0.2%

B737-300 Narrowbody Jet

0.0%

0.0%

0.2%

0.1%

GLF4

0.2%

B737-400 Narrowbody Jet

1.8%

0.0%

0.0%

0.0%

JS32

0.2%

B737-700 Narrowbody Jet

1.9%

2.0%

5.2% 10.5%

B717-200

0.3%

B737-800 Narrowbody Jet

7.0%

7.8%

9.1% 10.0%

DH8D

0.4%

B757-200 Narrowbody Jet

2.5%

1.3%

1.0%

0.6%

B757-200

0.6%

0.5%

0.0%

0.0%

0.0%

DH8A

0.6%

20.2% 22.7% 21.4% 8.8%

A321

0.7%

HELO

0.8%

E45X

0.8%

Regional Jet

CRJ2

Regional Jet

CRJ7

Regional Jet

2.6%

1.3%

1.6%

2.5%

CRJ9

Regional Jet

1.3%

1.8%

1.7%

1.7%

DH8A

Turboprop

1.0%

1.5%

1.2%

0.6%

DH8D

Turboprop

0.2%

0.5%

0.6%

0.4%

E135

Regional Jet

3.7%

3.4%

1.4%

0.2%

E145

Regional Jet

6.0%

2.9%

1.7%

1.5%

E170

Regional Jet

18.7% 20.8% 22.8% 19.5%

E190

Regional Jet

4.4%

4.0%

6.2%

9.2%

A320

E45X

Regional Jet

0.5%

0.2%

0.5%

0.8%

CRJ2

8.8%

GLF4

General Av iation 0.0%

0.1%

0.1%

0.2%

E190

9.2%

GLF5

General Av iation 0.2%

0.1%

0.0%

0.1%

B737-800

Aircraft Type

CRJ1

E145

1.5%

CRJ9

1.7%

MD88

1.7%

MD90

2.1%

CRJ7

2.5% 4.4%

10.0%

HELO

Helicopter

0.0%

0.0%

0.1%

0.8%

B737-700

JS31

Turboprop

0.3%

0.0%

0.0%

0.0%

*CL60

11.0%

JS32

Turboprop

0.0%

0.2%

0.2%

0.2%

A319

11.3%

MD82

Narrowbody Jet

1.1%

1.5%

0.8%

0.0%

E170

MD83

Narrowbody Jet

0.8%

0.5%

0.2%

0.0%

MD88

Narrowbody Jet

1.4%

2.2%

1.3%

1.7%

MD90

Narrowbody Jet

1.6%

2.0%

2.5%

2.1%

10.5%

19.5% 0%

5%

10%

15%

20%

25%

Annual Average Fleet Mix Percentage

*CL60 aircraft type is similar to CRJ family.

2015

mwaa.com

16

Reagan National (DCA) Aircraft Fleet Mix Percentages - Continued Figure 20: DCA Annual Fleet Mix

General Aviation

Turboprops Helos/Military

DCA 2015 Annual Fleet Mix

Regional Jets 55.0%

2015

Narrow-body Jets 41.8%

mwaa.com

Narrow-body Jets

41.8%

Regional Jets

55.0%

General Aviation

1.0%

Turboprops

1.4%

Helos/Military

0.9%

17

Reagan National (DCA) DCA Nighttime Noise Rule History Since 1941, Reagan National has operated as a commercial airfield, 24 hours a day, seven days a week. It is important to note that an operational curfew has never existed at Reagan National. By late 1981, louder aircraft operating at Reagan National prompted the airport operator at that time, the FAA, to impose nighttime noise restrictions between 10 p.m. and 6:59 a.m. The restrictions became known as the DCA Nighttime Noise Rule. In 1987, the U.S. Congress established the Airports Authority to operate Reagan National and Dulles International airports on behalf of the federal government. The operational transfer included the DCA Nighttime Noise Rule, which superseded the Airport Noise and Capacity Act of 1990 (ANCA)*.

* Airport Noise and Capacity Act of 1990 (ANCA): ANCA is a federal regulation that required all U.S. aircraft operators modernize their fleet to comply with quieter (stage 3) aircraft noise standards by December 31, 1999. ANCA also limits U.S. airports from imposing new noise-based operational restrictions on quieter (stage 3) aircraft. As of October 1, 1990, airports are limited from implementing restrictions on:  Airport hours of operation  Number of stage 3 operations  Single event or cumulative aircraft noise levels 

The DCA Nighttime Noise Rule is not an operational curfew. The DCA Nighttime Noise Rule is a regulation that enables the Airports Authority to levy penalties on non-compliant (louder) aircraft that operate during nighttime hours. It defines: 1) Compliant and non-complaint (louder) aircraft based on published FAA noise certification data for each aircraft. 2) Guidelines for imposing civil penalties on airlines/operators for operating non-compliant aircraft. When it was implemented, only a few aircraft could comply with the DCA Nighttime Noise Rule. Some residents incorrectly interpreted the lack of nighttime operations as a curfew. However, aviation technology has improved since 1981, and the majority of modern aircraft now comply with the DCA Nighttime Noise Rule. Figures 21 – 22 provide the average number of daily arrivals and departures during early morning and late-night hours. Changes in operations are the result of airlines operating compliant aircraft to meet the demand for early morning and late-night travel. Figure 21: DCA Operations 5 a.m. – 7 a.m.

Figure 22: DCA Operations 10 p.m. – 1 a.m. DCA Average Daily Counts by Operation Type (10 p.m. - 1 a.m.)

60 50 40 30 20 10 0 2009

Operation Counts

Operation Counts

DCA Average Daily Counts by Operation Type (5 a.m. - 7 a.m.)

2010

2011

2012

2013

2014

2015

60 50 40 30 20 10 0 2009

2010

2011

Year Arrivals

2015

2012

2013

2014

2015

Year Departures

Arrivals

mwaa.com

Departures

18

Reagan National (DCA) DCA Nighttime Noise Rule Enforcement Policy The DCA Nighttime Noise Rule is based on aircraft noise measurements obtained during the FAA’s Noise Certification process for each aircraft type, model, engine type and weight. Aircraft noise certification data is published in FAA Advisory Circular 36-3H, “Estimated Airplane Noise Levels in A-Weighed Decibels.” There are no federal regulations that limit in-flight aircraft noise levels after the Airport Noise and Capacity Act of 1990 federally mandated a quieter (all stage 3) U.S. aircraft fleet by December 31, 1999. Federal regulations prohibit the use of operational, in-flight aircraft noise measurements, obtained outside the FAA’s noise certification process, to enforce the DCA Nighttime Noise Rule. Consequently, the Airports Authority’s noise monitoring data is only a public information resource. The data cannot be used to audit, investigate or enforce the DCA Nighttime Noise Rule. FAA Noise Certification Process: During certification test conditions, as defined in Federal Aviation Regulation Part 36 – Noise Standards: Aircraft Type and Airworthiness Certification, noise measurements are required at specific approach and departure locations (Figure 23):  

Approach: 2,000 meters from runway threshold Takeoff: 6,500 meters from start of takeoff roll Figure 23: FAA Aircraft Noise Certification Measurement Points

DCA Nighttime Noise Rule compliant aircraft are solely determined by FAA noise certification levels (not operational, in-flight levels) that are equal or less than:   2015

Approach: Takeoff:

85 dB(A) 72 dB(A) mwaa.com

19

Reagan National (DCA) DCA Nighttime Noise Rule Violations

The Airports Authority audits, investigates and enforces the DCA Nighttime Noise Rule to ensure aircraft are in compliance. Non-compliant aircraft may be fined a civil penalty up to $5,000 per violation by the Airports Authority. In 2015, Reagan National recorded 36 DCA Nighttime Noise Rule violations (Figure 24): Figure 24: DCA Nighttime Violations

2015 DCA Nighttime Noise Rule Violations

2015

Airline

# of Violations

Total of Accessed Civil Penalties

Alaska

2

$5,000

American

10

$42,500

Delta

16

$80,000

JetBlue

5

$25,000

United

3

$10,000

Total

36

$157,500

mwaa.com

20

Reagan National (DCA) Noise Monitor Program The first noise monitors were installed around Reagan National in 1978 when the FAA operated the airport. At Reagan National, a key strategy for limiting aircraft noise exposure has been to maximize aircraft movements over water and minimize movements over densely populated communities. After consultation with the Metropolitan Washington Council of Governments, many of the noise monitors were located along the flight corridors near the Potomac and Anacostia Rivers. The Airports Authority continues to voluntarily upgrade and maintain the noise monitors around Reagan National without any external funding. The noise monitors provide aircraft and community noise levels near Reagan National as a public information resource.

Federal law prohibits the use of noise monitor data to audit, investigate or enforce the DCA Nighttime Noise Rule.

Noise Monitors and Noise Event Detection Criteria: Traditional Noise Event Detection Methodology: Prior to 2015, the Airports Authority’s noise monitors detected a noise event when the noise level exceeded a noise threshold for a minimum duration. During noise data post-processing, only detected noise events were correlated against aircraft position data. The traditional methodology had technological challenges:   

Quieter aircraft commonly generated noise levels that did not satisfy the noise event threshold criteria. Aircraft noise events could easily be contaminated by community noise sources (traffic, construction, community activities, nature – weather, animals, foliage). Lowering the noise event detection threshold did not account for increased background noise levels.

ANEEM - Aircraft Noise Event Extraction Methodology: As of 2015, the Airports Authority is the first U.S. airport system to upgrade its noise monitoring software using a new noise event detection methodology called ANEEM (Aircraft Noise Event Extraction Methodology), provided by Bruel & Kjaer EMS. ANEEM does not solely rely on the noise monitor to detect a noise event. During noise data post-processing, ANEEM cross-references databases to identify aircraft in the vicinity of the noise monitor when the noise level rises above the background level. It identifies and correlates aircraft-dominated noise events by comparing aircraft position data with predicted noise levels for that aircraft, using FAA noise certification data. ANEEM provides a more accurate detection methodology for distinguishing aircraft noise from other noise sources experienced in neighboring communities. It is very important to clarify that the “total noise” experienced at a noise monitor is unaffected by the choice of a noise event detection methodology. ANEEM only improves the accuracy of the noise source classification process. ANEEM noise event counts will be higher because ANEEM accounts for quieter aircraft and higher background noise levels. However, the “total noise” experienced at the noise monitor is consistent with legacy software. 2015

mwaa.com

21

Reagan National (DCA) Noise Monitor Locations Reagan National has 15 noise monitors positioned along flight corridors.

NMT

NMT Name

Address

City

ST

Zip

Jurisdiction

2

Cabin John

6515 76th St

Cabin John

MD

20818

Montgomery

3

Langley Forest

6737 Sorrell St

McLean

VA

22101

Fairfax

4

Potomac Palisades

5334 Carolina Pl NW

Washington

DC

20016

DC

5

Chain Bridge

3536 36th Rd N

Arlington

VA

22207

Arlington

6

Georgetown

Georgetown Visitation School 1524 35th St NW

Washington

DC

20007

DC

7

Rosslyn

2220 N Rolfe St

Arlington

VA

22201

Arlington

8

Old Town

Founder's Park 499 N Union St

Alexandria

VA

22314

City of Alexandria

9

Springfield

6414 Meriwether Ln

Springfield

VA

22150

Fairfax

10

Fort Foote

FAA Communications Site Fort Foote Rd

Ft Washington

MD

20744

Pr. George's

11

Marlan Forest

1219 Warrington Pl

Alexandria

VA

22307

Fairfax

12

Tantallon

W Tantallon Dr

Ft Washington

MD

20744

Pr. George's

Washington

DC

20024

DC

Alexandria

VA

22308

Fairfax

Fort McNair Army Base 1400 4th St SW Carl Sandburg School 8428 Fort Hunt Rd

17

Southwest DC

19

North Mt. Vernon

20

Dumbarton

3910 N Dumbarton St

Arlington

VA

22213

Arlington

Avenel

Avenel Equestrian Center 10010 Oaklyn Dr

Potomac

MD

20854

Montgomery

22

2015

mwaa.com

22

Reagan National (DCA) Noise Monitor Data In 2015, the Airports Authority upgraded its noise monitoring software to include a new noise event detection process called Aircraft Noise Event Extraction Methodology (ANEEM). ANEEM classifies aircraft, community and mixed noise events based on available aircraft position and flight plan data. Although ANEEM improves the noise source classification process, a noise event may occasionally be misclassified due to limited aircraft data. The 2015 monthly noise event data introduces several noise classifications and metrics: Noise % Time Total Monitor 2015 Online Leq # **DNL *Leq

Aircraft

Community

Mixed

Background (non-event)

# Min Modal Max # Min Modal Max # Min Modal Max *Leq *Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Lmax Lmax Lmax

*Leq

Noise Classification Descriptions:  Aircraft: Noise events correlated with aircraft position data.  Community: Noise events without correlated aircraft position data.  Mixed: Noise events attributed to correlated aircraft and community noise.  Background: Environmental noise not associated with aircraft or community noise. Noise Event Metric and Table Header Descriptions:  Aircraft DNL: A cumulative exposure metric that logarithmically calculates the average Aircraft dB(A) level over a 24-hour period, with a 10 dB penalty artificially applied to aircraft noise events occurring during nighttime hours (22:00 - 06:59).  The 10 dB penalty is equivalent to replacing ‘1’ nighttime aircraft noise event with ’10’ nighttime aircraft noise events.  dB(A): A-weighted decibel scale that adjusts (weights) low frequency ranges to model the response perceived by the human ear.  Leq: For Each Noise Classification: A cumulative exposure metric that logarithmically averages the varying sound energy over a defined period of time (month), and states it as a constant (equivalent) level for each noise classification type.  Lmax: A single event noise metric that represents the maximum (peak) dB(A) level  during a discrete noise event. Monthly peak levels are represented as:  Min (lowest peak), Modal (most common ‘whole #’ peak), Max (highest peak)  Total Leq: For All Noise Classifications: A cumulative exposure metric that logarithmically averages the varying sound energy over a defined period of time (month), and states it as a constant (equivalent) level for all noise classifications.  # Events: Number of noise events during the month for each noise classification type.  % Time Online: Percent of the month that the noise monitor was operational.

For noise event comparisons at a noise monitor location, the 2015 report provides: *Leq for direct comparison of ‘non-penalized’ aircraft, community, mixed and background noise. **Aircraft DNL Only since the 10 dB penalty is only applied to aircraft noise events (22:00 – 06:59).

2015

mwaa.com

23

Reagan National (DCA) Noise Monitor Data - Continued Noise data may not always be available for a specific site due to technical issues associated with the noise monitoring equipment, software anomalies, power, communications, site construction, vandalism and other factors.  

Gray: Missing or excluded data Yellow: Percent (%) Time Online less than 75% o 2015 (1st Quarter): Noise monitoring software and tele-communication upgrades resulted in data gaps.

Noise % Time Total Monitor 2015 Online Leq # DNL Leq 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4

2015

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

67.8 99.8 99.9 99.9 99.9 99.9 99.8 99.9 99.9 99.9 99.9

52.4 57.3 55.8 56.6 55.6 54.4 55.1 55.0 54.4 55.0 55.1

50.2 51.3 51.6 54.4 53.4 53.9 53.6 53.6 53.4 53.2 53.3

47.8 49.0 49.1 51.4 50.5 50.8 50.5 50.5 50.7 50.7 50.5

67.8 99.7 96.4 99.9 96.9 99.9 99.9 99.9 99.9 99.9 99.9

51.4 54.3 57.9 58.4 55.3 54.1 58.5 53.5 55.1 52.9 52.1

43.6 45.0 47.1 45.8 45.3 45.3 44.9 45.2 45.2 44.3 44.2

41.0 42.5 44.6 43.3 42.7 42.6 42.7 43.0 43.1 42.5 42.4

67.7 99.8 99.9 98.7 99.9 99.9 99.9 99.9 99.9 99.9 99.9

56.2 58.3 58.7 62.3 60.6 57.9 57.7 57.5 57.8 57.8 57.5

55.9 57.4 58.5 58.5 58.2 58.0 58.0 58.0 58.2 57.9 57.8

53.4 54.9 55.9 55.9 55.5 55.3 55.3 55.3 55.8 55.5 55.3

Aircraft

Community

Mixed

# Min Modal Max # Min Modal Max # Min Modal Max Leq Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Lmax Lmax Lmax Hardware / Software Upgrade 5258 50.5 60 87.0 45.9 8235 50.3 56 90.4 37.7 117 55.7 64 89.3 9070 50.4 62 81.3 52.8 14496 50.4 56 104.2 43.0 264 54.4 67 99.1 8470 50.6 64 80.9 49.0 17215 50.3 56 96.8 42.3 225 55.6 68 95.2 11628 50.7 64 81.6 52.5 13726 50.4 56 99.6 41.3 201 54.6 70 86.1 11362 50.3 62 82.8 50.3 12425 50.2 56 100.1 40.4 109 55.1 72 91.9 11882 50.8 64 83.0 47.4 10252 50.1 54 96.0 38.9 114 57.0 72 86.3 10568 50.5 64 86.1 44.9 6702 52.5 58 96.2 37.4 98 54.0 72 85.8 11086 50.6 64 81.2 45.1 5326 52.3 58 86.2 37.2 86 54.5 68 85.0 11382 50.5 64 82.6 46.4 6887 52.5 58 88.6 40.2 177 54.7 67 84.7 10577 50.5 62 83.7 47.0 6773 52.5 58 86.4 40.2 176 51.0 71 80.8 10434 50.7 64 81.8 49.0 6030 52.3 58 104.6 39.0 140 58.8 68 90.7 Hardware / Software Upgrade 1758 50.9 58 80.3 47.8 11118 50.4 56 92.2 33.6 118 54.8 62 79.7 3664 50.6 58 79.4 52.5 20474 50.5 56 107.8 37.2 349 53.7 64 88.5 4422 50.8 58 84.3 53.4 22359 50.4 56 93.5 44.8 612 53.5 64 89.7 3491 50.7 60 84.5 54.9 25482 50.3 60 108.7 43.5 869 53.3 62 87.2 3607 50.6 58 78.8 51.9 23224 50.2 58 97.8 42.1 627 54.3 62 82.7 3891 50.4 58 81.1 50.2 18821 50.2 58 92.2 41.3 532 55.3 60 87.4 4049 50.2 58 81.9 52.1 13106 52.2 58 94.7 42.9 495 50.5 60 87.3 4278 50.3 58 77.5 48.8 12098 52.3 60 94.7 40.7 379 51.0 61 88.9 4061 50.3 58 78.9 50.2 15922 52.4 58 90.3 43.3 494 54.8 64 89.0 3352 50.6 58 79.3 48.1 14020 52.2 60 85.5 39.8 353 53.4 62 91.9 3045 50.5 58 83.7 47.4 13341 52.3 58 87.6 37.1 349 52.3 63 84.0 Hardware / Software Upgrade 7321 51.3 66 94.3 48.6 9124 50.3 56 94.5 40.1 50 62.5 78 87.2 11825 51.5 68 89.4 51.3 14845 50.4 58 105.2 42.8 122 54.5 73 93.4 12415 51.2 70 87.7 49.1 19032 50.7 58 92.6 41.5 169 51.3 71 89.7 12284 52.3 68 86.9 55.5 22109 50.8 58 98.2 40.5 108 58.1 73 87.2 12148 50.9 68 90.9 55.5 20165 50.8 56 99.2 45.6 126 56.7 76 99.2 12715 50.9 68 89.9 48.2 12514 50.5 56 97.8 41.1 96 53.4 74 98.4 12102 50.8 68 87.2 47.8 9414 52.3 58 91.5 40.3 92 58.0 69 86.7 11998 52.0 68 85.8 47.1 8171 52.5 58 88.9 41.6 82 59.8 71 91.1 12396 52.2 70 89.5 47.2 9493 52.6 58 84.3 42.5 166 52.8 71 93.8 11566 50.9 68 88.1 48.3 9021 52.6 58 91.8 42.0 144 59.8 72 90.8 11352 51.0 70 88.8 46.8 7801 52.5 58 94.1 42.4 144 62.6 72 86.7

mwaa.com

Background (non-event) Leq 48.4 54.0 53.1 51.0 51.3 49.7 52.4 52.2 50.2 51.4 50.9 47.9 48.4 55.2 55.4 51.7 50.9 57.1 50.7 52.5 50.2 49.3 50.6 53.2 54.2 59.7 56.1 53.0 52.6 52.2 51.9 52.2 51.9

24

Reagan National (DCA) Noise Monitor Data - Continued Noise % Time Total Monitor 2015 Online Leq DNL Leq # 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 6 6 7 7 7 7 7 7 7 7 7 7 7 7 8 8 8 8 8 8 8 8 8 8 8 8

2015

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

67.7 99.8 91.8 98.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

55.7 57.8 58.8 59.3 58.2 58.4 61.4 58.5 58.6 58.7 58.0

55.9 57.9 59.4 59.4 58.6 58.9 58.8 58.8 59.1 58.4 58.6

53.2 55.3 56.6 56.4 55.8 55.9 55.9 56.0 56.4 55.9 55.8

54.6 69.2 99.9 98.8 99.2 99.9 99.9 99.9 99.9 99.9 99.9

54.1 63.1 59.3 59.0 58.4 58.2 58.9 58.2 57.6 57.9 57.2

51.9 57.3 58.0 57.3 56.6 56.9 57.2 57.5 57.8 57.9 57.7

49.3 54.7 55.6 54.7 53.8 54.3 54.3 54.5 55.1 55.1 54.9

67.7 99.8 99.9 99.9 91.0 99.9 99.9 99.9 99.9 99.9 99.9

59.0 61.3 62.5 62.9 61.9 61.4 60.1 60.1 61.8 61.3 59.8

60.0 61.1 61.5 61.2 62.0 60.8 60.8 61.1 61.5 61.2 60.8

57.4 58.4 58.7 58.5 59.1 58.2 58.1 58.4 59.1 58.9 58.3

67.7 99.8 99.9 91.5 99.9 99.9 99.9 99.9 99.7 99.9 99.9

56.8 60.0 60.6 60.8 59.3 60.4 59.5 58.8 59.2 58.8 58.8

57.0 59.7 61.0 61.0 60.0 61.2 60.6 59.7 60.1 59.5 59.8

54.3 56.9 58.2 58.3 57.2 58.4 57.9 57.2 57.4 57.1 57.2

Aircraft

Community

Mixed

Min Modal Max # Min Modal Max # Min Modal Max # Leq Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Lmax Lmax Lmax Hardware / Software Upgrade 94.9 68 62.4 94.6 39.6 30 54 7001 51.8 66 82.9 47.7 12117 50.2 80.9 72 53.9 54 108.5 37.2 105 11918 50.5 70 84.3 50.4 24292 50.3 84.3 78 51.5 89.4 41.6 132 56 11335 52.6 70 85.8 48.7 22762 50.2 94.0 72 53.5 54 101.0 41.2 93 12620 51.9 70 86.9 52.1 23927 50.3 95.8 74 56.8 95.5 41.0 49 54 12204 51.6 70 86.2 49.7 19403 50.3 89.0 76 53.0 92.6 40.2 87 54 12688 51.1 70 85.9 49.9 18214 50.5 78 102.1 57.0 58 105.4 47.0 99 11965 51.5 70 85.7 58.0 7865 52.5 84.8 73 56.8 86.6 39.1 47 55 12000 51.6 70 85.2 48.0 9287 52.2 86.7 74 54.9 89.7 40.5 100 55 12423 51.5 70 86.8 49.1 14953 52.3 86.3 78 57.5 92.5 41.6 86 56 11584 51.6 70 85.9 49.1 18460 52.3 89.2 72 59.0 86.4 40.2 68 56 11383 51.1 70 86.5 47.2 19263 52.2 Hardware / Software Upgrade 85.2 70 57.4 96.9 37.1 62 56 5243 50.8 62 79.9 49.4 12303 50.4 69 102.2 52.6 58 104.1 46.4 118 8347 51.0 66 88.4 58.1 18312 50.6 93.9 76 54.3 93.6 41.7 172 62 11770 51.5 66 90.0 52.0 19042 50.8 89.4 77 58.3 62 106.7 38.7 104 11638 52.8 64 89.6 52.7 7712 51.1 87.6 77 54.8 99.2 39.9 83 62 11283 50.6 64 87.0 51.1 9993 51.4 92.8 72 53.0 60 104.8 42.4 73 12633 50.8 62 86.7 52.0 14136 51.1 91.1 78 59.3 60 105.8 37.6 62 12138 52.0 62 85.9 52.8 14336 52.4 88.9 75 52.9 92.3 39.3 42 60 11889 51.5 62 83.5 50.0 13820 52.5 88.5 72 51.6 91.7 37.3 75 60 12462 51.1 62 85.8 48.2 16116 52.3 85.7 72 53.4 92.4 37.5 72 60 11655 51.6 70 85.1 48.4 13093 52.3 85.9 72 65.4 91.1 36.8 62 60 11447 50.6 64 88.5 47.3 13029 52.2 Hardware / Software Upgrade 81.8 67 60.4 88.9 35.3 29 58 7134 52.5 70 87.6 49.9 12519 50.4 92.0 74 58.3 98.8 42.8 92 58 12101 52.1 72 88.7 55.4 20051 50.4 94.8 78 52.7 95.1 47.8 167 58 12576 52.6 72 90.2 58.0 19541 50.5 93.2 77 56.7 58 104.7 41.2 63 12804 52.0 68 90.9 58.6 19092 50.3 90.1 86 59.7 58 104.5 36.8 29 11284 51.7 74 89.8 56.7 21186 50.6 89.4 74 58.4 58 102.5 45.0 94 12856 50.6 72 88.4 55.4 15049 50.7 87.4 72 59.7 91.8 36.6 42 60 12423 52.7 74 88.6 48.8 10163 52.2 87.0 77 57.8 88.9 38.3 34 58 12136 50.4 74 89.3 47.1 7478 53.4 90.7 77 52.9 93.1 46.0 144 58 12453 51.0 74 89.7 54.2 9950 52.5 86.4 75 53.1 91.0 42.6 95 60 11657 51.9 74 89.9 51.3 9744 52.4 88.1 74 63.9 91.6 38.8 65 58 11515 52.2 74 90.7 47.2 7674 52.4 Hardware / Software Upgrade 82.0 72 57.1 88.3 34.9 61 56 7278 50.6 66 85.3 50.2 14432 50.3 87.0 74 51.2 56 111.9 38.9 97 11952 51.1 66 88.6 54.1 17369 50.4 89.3 75 52.4 94.6 42.5 126 58 12099 50.6 68 90.5 50.0 20532 50.5 84.0 76 59.7 58 110.0 39.4 72 11483 52.3 66 91.0 54.7 18627 50.3 94.8 66 55.0 58 101.0 39.7 47 12191 51.2 68 90.5 51.0 17048 50.5 90.8 76 53.4 95.7 39.5 55 58 12615 50.9 66 90.0 51.5 19119 50.4 86.1 78 50.9 97.4 37.1 58 58 12157 50.6 66 89.9 49.2 15643 52.3 95.7 76 56.7 99.2 41.1 64 58 11750 50.8 66 89.0 49.1 12363 52.3 91.0 66 54.2 95.3 40.5 78 58 12328 50.9 68 87.9 49.1 10654 52.1 83.8 66 54.0 93.1 35.9 53 58 11671 50.9 66 87.1 48.4 9816 52.3 84.8 68 55.0 95.6 36.2 50 58 11383 52.0 66 88.2 46.9 9518 52.5

mwaa.com

Background (non-event) Leq 49.8 51.5 53.5 53.7 52.6 53.1 54.9 53.8 52.7 54.0 52.7 49.0 60.3 55.0 54.8 54.9 53.3 54.9 54.3 52.5 53.4 52.1 51.8 54.4 55.2 57.0 54.2 55.1 54.8 54.5 55.9 56.2 53.3 49.9 53.8 55.7 53.5 52.8 53.9 52.6 51.5 52.7 52.3 52.6

25

Reagan National (DCA) Noise Monitor Data - Continued Noise % Time Total Monitor 2015 Online Leq DNL Leq # 9 9 9 9 9 9 9 9 9 9 9 9 10 10 10 10 10 10 10 10 10 10 10 10 11 11 11 11 11 11 11 11 11 11 11 11 12 12 12 12 12 12 12 12 12 12 12 12

2015

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

67.7 99.8 99.9 98.9 80.6 99.9 99.9 99.9 99.9 99.9 99.9

54.1 56.0 56.4 57.4 59.4 61.8 58.2 55.9 55.0 54.7 53.8

46.1 46.3 46.2 45.3 44.7 44.4 44.9 45.2 46.1 45.9 45.3

42.4 42.6 43.3 42.2 40.7 40.8 41.9 42.0 42.8 43.1 42.3

64.9 87.0 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

57.3 64.1 58.1 59.9 58.5 57.6 57.4 57.7 57.9 57.5 57.6

55.4 57.6 57.6 58.2 58.0 56.9 56.4 56.8 57.5 57.1 57.1

52.7 54.7 54.9 55.6 55.1 54.2 53.7 54.0 54.7 54.5 54.3

67.7 99.8 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

56.3 54.6 55.3 55.8 58.4 59.7 55.7 54.4 54.1 57.6 55.0

44.8 48.4 50.3 50.4 48.0 51.4 51.5 50.1 49.9 49.4 49.7

41.9 45.9 47.7 47.8 44.6 48.5 48.9 47.8 47.7 47.2 47.5

67.3 99.7 99.9 94.4 99.9 99.9 99.9 99.9 99.9 99.9 99.9

53.2 62.5 55.8 56.5 54.1 54.4 54.7 53.8 53.4 53.0 53.1

48.0 50.0 49.0 48.5 49.4 48.3 48.1 48.5 49.1 49.0 49.1

45.4 46.9 46.1 45.8 46.1 45.5 45.2 45.8 46.4 46.3 46.3

Aircraft

Community

Mixed

Min Modal Max # Min Modal Max # Min Modal Max # Leq Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Lmax Lmax Lmax Hardware / Software Upgrade 85.2 64 54.2 92.0 36.4 174 62 2016 50.7 60 81.2 51.1 21056 50.5 84.5 64 56.4 97.5 37.0 333 62 2742 50.7 62 79.4 52.9 37505 50.5 83.9 64 51.8 99.7 40.6 464 62 2483 51.2 62 82.0 53.2 44562 50.6 88.4 64 51.8 60 110.9 38.5 342 2213 50.8 62 81.9 55.6 50391 50.2 84.4 64 53.5 97.5 36.1 173 60 1876 50.7 60 76.2 53.2 35053 50.2 95.6 64 53.3 60 105.9 40.0 224 2029 50.7 62 75.7 57.5 46038 50.2 85.8 64 53.9 92.6 41.5 286 60 2251 50.9 62 79.3 54.8 35664 52.3 87.1 64 53.4 90.7 39.5 220 58 2532 50.6 60 80.9 52.1 30832 52.4 86.8 65 51.3 97.6 37.6 251 58 2975 50.4 60 81.4 50.8 31118 52.5 78.8 64 56.3 89.8 35.8 227 58 2886 50.5 60 84.4 50.6 27453 52.3 87.6 66 53.2 94.6 36.3 226 60 2588 50.7 60 81.3 49.0 26589 52.4 Hardware / Software Upgrade 86.1 70 57.5 92.7 37.7 128 68 6449 50.3 68 85.8 53.8 17565 50.8 69 110.5 57.6 66 108.6 50.3 225 9882 50.7 68 90.5 58.2 25109 50.6 87.8 69 54.2 66 103.1 41.0 258 11851 51.0 68 87.3 53.3 31859 50.5 88.4 68 55.1 66 108.3 40.3 231 11922 51.8 70 85.9 56.6 38571 50.3 87.9 75 54.8 66 103.1 40.9 157 11938 51.0 68 84.7 53.8 32584 50.5 84.1 66 59.0 96.5 36.5 155 66 12343 50.8 66 85.1 52.7 31637 50.1 91.5 67 55.0 96.6 39.5 177 66 11811 51.3 66 87.1 51.8 28578 52.1 91.2 66 59.3 95.3 40.5 169 66 11487 50.8 68 88.2 52.3 28984 52.3 89.5 70 61.4 94.3 40.3 236 66 12109 51.0 68 85.5 52.9 29303 52.5 88.4 69 57.1 94.3 39.8 234 66 11430 51.2 68 84.9 52.5 27155 52.3 90.4 70 55.5 99.1 39.6 184 66 11121 50.9 68 84.4 53.1 28037 52.5 Hardware / Software Upgrade 86.1 58 54.5 89.4 38.6 168 54 2295 50.2 54 80.6 46.3 5268 50.3 82.7 58 53.3 56 107.8 37.1 465 5812 50.3 54 82.6 50.8 11713 50.3 92.7 60 52.0 91.9 43.7 617 56 7133 50.3 56 85.5 50.5 14529 50.4 86.5 60 54.3 56 100.8 41.2 508 7031 50.3 56 83.1 51.9 15813 50.3 86.7 60 51.5 56 100.1 39.5 315 4471 50.2 54 84.3 51.1 17434 50.3 60 101.7 53.2 56 104.2 48.1 414 5538 50.3 54 86.2 50.4 16187 50.3 82.4 58 54.2 86.4 39.7 370 56 5778 50.2 54 83.4 46.9 7771 52.3 83.7 60 53.7 86.3 40.0 255 56 5454 50.4 54 83.6 47.2 5917 52.2 82.9 60 50.5 93.6 42.4 383 56 6556 50.3 54 81.7 48.0 7154 52.3 90.9 60 54.1 92.9 43.0 444 56 5559 50.3 54 82.5 49.7 7373 52.1 82.2 60 53.1 90.7 40.6 372 56 5517 50.3 54 83.8 49.7 6461 52.5 Hardware / Software Upgrade 81.5 68 55.9 91.9 38.2 332 66 4412 50.4 60 77.3 50.6 12622 50.4 68 103.5 53.2 66 107.3 47.7 557 7015 50.7 62 79.4 59.3 20700 50.4 89.6 68 53.8 99.4 39.1 489 66 6496 50.8 60 81.6 51.2 24009 50.3 83.9 68 54.0 64 107.8 39.7 394 5370 50.5 62 77.0 54.9 25570 50.1 84.5 66 53.0 97.0 37.3 370 64 6914 50.8 62 78.0 51.2 25833 50.3 94.1 66 52.9 95.9 38.0 351 64 5772 50.5 62 78.8 51.1 31132 50.2 91.5 66 51.1 98.7 37.9 472 64 5545 50.3 62 75.3 50.6 22961 52.3 85.1 66 52.3 93.7 36.1 401 64 6478 50.3 60 77.6 49.4 19826 52.4 86.3 68 53.2 97.9 38.4 631 64 7178 50.6 62 77.0 50.0 19924 52.4 83.5 68 51.1 92.2 38.6 591 66 6948 50.4 60 79.9 49.6 19060 52.2 84.7 68 53.5 87.3 39.0 548 66 6551 50.8 62 79.8 50.0 19879 52.2

mwaa.com

Background (non-event) Leq 50.2 52.5 52.9 52.1 58.1 59.7 55.2 53.1 52.3 52.0 51.5 50.0 61.8 50.4 51.6 51.2 50.7 51.8 51.8 50.6 49.8 50.0 55.6 51.0 51.6 51.8 57.2 58.4 53.7 51.8 50.6 56.1 51.9 47.3 59.2 53.0 49.6 49.0 50.2 51.5 50.5 48.3 47.7 47.2

26

Reagan National (DCA) Noise Monitor Data - Continued Noise % Time Total Monitor 2015 Online Leq DNL Leq # 17 17 17 17 17 17 17 17 17 17 17 17 19 19 19 19 19 19 19 19 19 19 19 19 20 20 20 20 20 20 20 20 20 20 20 20 22 22 22 22 22 22 22 22 22 22 22 22

2015

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

67.7 99.8 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

58.7 62.5 61.3 58.9 58.1 57.5 57.2 57.0 57.9 58.6 59.1

53.5 55.2 55.8 55.2 54.8 54.8 54.3 54.0 55.2 55.3 54.8

52.4 53.9 54.1 53.5 52.8 52.5 52.5 52.2 53.8 53.5 53.0

Aircraft

Background (non-event)

Mixed

Community

Min Modal Max # Min Modal Max # Min Modal Max # Leq Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Lmax Lmax Lmax Hardware / Software Upgrade 89.3 68 58.5 91.4 42.0 61 60 1972 50.5 66 92.1 54.0 21849 50.3 95.2 70 53.7 62 109.3 45.5 214 3038 51.8 68 94.0 58.5 31132 50.5 69 102.8 59.2 60 103.6 46.6 261 3391 50.8 68 93.0 57.6 29486 50.5 86.6 69 51.2 60 106.5 39.3 132 2588 50.7 68 89.9 54.3 28041 50.7 90.1 68 61.5 58 100.5 41.7 152 4018 50.3 66 91.5 52.8 23443 50.8 84.5 69 54.6 58 102.6 39.3 87 4122 51.0 66 89.7 52.0 24186 50.5 83.4 68 54.8 91.6 38.0 114 58 4190 51.6 66 89.7 50.6 19758 52.8 85.1 68 55.4 58 104.4 39.1 126 4709 50.9 66 87.7 51.9 18269 52.8 85.9 68 51.3 89.0 41.8 271 58 5822 50.5 66 89.8 51.2 20762 52.5 85.9 68 53.5 90.8 41.4 304 60 5595 51.4 66 89.8 52.3 20393 52.3 85.5 69 56.7 89.8 40.8 276 62 4819 50.8 68 90.3 53.1 24062 52.2

Leq 54.7 58.9 56.8 54.4 53.9 53.3 53.5 52.3 53.6 55.0 56.0

School Construction / Renovation

75.6 99.9 99.9 99.9 99.9 99.9

55.5 52.4 51.5 49.2 48.7 48.7

43.4 41.8 41.1 41.7 41.7 41.2

40.3 39.3 38.1 39.3 39.0 38.4

1524 1741 1522 2371 2055 2041

50.9 50.6 50.5 50.2 50.3 50.3

65.8 99.8 99.9 91.0 99.9 99.9 98.7 99.9 99.9 99.9 99.9

49.7 52.4 53.1 57.3 52.7 59.0 53.4 52.5 51.3 50.4 49.4

39.6 41.4 44.9 43.9 41.9 42.7 43.7 44.7 44.9 44.2 43.2

38.3 39.4 43.0 41.7 39.2 40.0 41.1 42.1 42.5 41.9 41.2

284 1621 3435 2411 2576 2993 3978 4771 4763 3934 3526

51.8 50.4 50.6 50.7 50.3 50.4 50.3 50.5 50.4 50.5 50.4

47.8 99.8 99.9 97.3 99.9 99.9 99.9 99.9 99.9 99.9 99.9

49.0 54.4 52.4 55.8 61.3 52.5 51.5 54.9 54.1 51.5 52.0

42.5 46.0 49.1 50.3 47.8 48.7 47.8 48.6 47.8 47.1 47.2

40.4 43.8 46.7 47.3 44.8 45.4 44.7 45.2 45.3 44.7 44.5

1437 4640 6805 7478 6196 7404 6401 6690 6366 5719 5642

50.3 50.5 50.6 50.6 50.6 50.5 50.4 50.1 50.3 50.3 50.5

58 77.7 41.0 2744 51.0 58 74.5 33.3 1054 52.1 58 76.9 38.4 3021 52.1 56 80.4 39.7 5408 52.2 56 76.8 39.0 4298 52.3 56 77.0 38.6 4127 52.3 Hardware / Software Upgrade 56 85.1 44.6 10200 50.2 58 81.4 49.8 19356 50.4 58 81.1 49.0 24616 50.5 58 79.5 54.3 20380 50.5 56 81.0 49.1 20915 50.5 56 80.2 52.6 16115 50.3 56 80.8 44.6 7353 52.3 58 79.1 45.2 8115 52.3 58 81.8 45.5 10290 52.2 56 80.6 44.3 9717 52.5 58 81.8 43.0 11375 52.3 Hardware / Software Upgrade 56 77.9 42.6 3908 50.4 58 77.1 52.1 12539 50.4 60 79.4 47.1 18464 50.2 60 79.3 53.1 19644 50.5 58 80.5 60.7 20541 50.3 58 78.8 48.7 14548 50.1 58 79.9 46.7 4013 52.3 58 83.8 51.9 6440 52.2 58 80.6 50.7 15790 52.2 58 80.3 46.7 10411 52.5 58 79.2 47.5 10428 50.8

mwaa.com

60 52 60 56 56 56

90.6 77.9 79.9 78.1 90.9 76.8

28.2 23.5 25.1 28.1 25.5 26.9

80 36 73 163 119 119

54.6 52.6 54.4 53.7 53.4 53.3

60 59 59 58 58 61

71.6 72.8 69.1 69.4 72.0 77.0

55.2 52.1 51.1 48.1 47.6 47.7

56 56 56 56 54 54 56 56 56 56 56

81.3 105.4 94.2 98.9 99.2 108.0 82.3 84.2 89.1 82.0 79.9

23.7 33.0 38.2 37.7 36.0 36.0 38.3 41.7 38.9 34.7 30.2

28 154 413 544 266 277 267 209 266 171 191

53.8 53.5 52.8 53.7 51.6 52.3 51.4 53.6 52.9 53.1 53.8

58 57 60 58 57 63 56 56 57 62 58

73.8 87.2 81.9 82.4 84.1 78.3 92.6 94.4 81.9 82.9 76.6

47.6 48.2 50.0 54.0 49.7 57.8 52.3 50.5 48.7 48.1 47.2

54 54 56 56 56 54 56 58 58 58 58

80.2 104.2 88.1 101.9 110.1 97.8 97.4 106.4 93.9 84.5 96.1

31.4 35.4 38.1 41.1 36.5 34.1 37.6 34.1 42.2 35.5 35.0

19 194 347 354 156 108 95 82 222 160 164

54.2 54.3 52.0 55.1 55.0 52.8 51.5 55.8 55.1 56.2 55.2

73 62 66 68 68 66 66 70 71 66 68

78.2 84.9 84.6 84.8 88.6 84.3 83.5 87.1 90.7 79.9 82.6

46.9 49.3 48.4 50.5 51.7 48.3 47.8 50.7 49.4 47.9 48.5

27

Reagan National (DCA) Noise Complaint Statistics In 2015, the Airports Authority received 8,760 complaints from 330 individuals that were associated with Reagan National (Figures 25 – 27). The majority of individuals (61.2%) submitted one complaint. Many of the complaints were associated with airline schedule changes between 10 p.m. – 6:59 a.m., as well as the FAA’s implementation of new NextGen arrival and departure procedures. Figure 26: DCA 2015 Complaints - Top 5 Individuals

Figure 25: DCA 2015 Complaint Statistics DC City Washington

Quad

# of Individuals

# of Complaints

NW

178

7930

SW

1

1

Total:

179

7931

DCA 2015 Complaints Top 5 Individuals vs. All Other Individuals Individuals 1 & 2* Individual 3 Individual 4

VA # of Individuals

# of Complaints

Alexandria

39

180

Arlington

36

343

Fairfax

2

2

Fairfax Station

1

1

Lorton

1

1

McLean

11

26

Springfield

3

26

Vienna

1

1

94

580

# of Individuals

# of Complaints

Accokeek

38

116

Bethesda

8

17

Cabin John

1

1

Chevy Chase

1

1

Fort Washington

2

2

Hyattsville

1

1

Indian Head

1

1

Kensington

1

1

Potomac

3

18

City

Total:

All Other DC Individuals All Other VA Individuals

Waldorf

All Other MD Individuals

1.2% 1 DC NW (Foxhall) Resident Individual 5 = 108 Complaints

6.1% All Other DC Individuals 532 Complaints

2015

14.7%

1

1

57

159

DCA

# of Individuals

# of Complaints

Grand Total

330

8670

Total:

2.4% 1 DC NW (Foxhall) Resident Individual 4 = 208 Complaints

* Same Residence

MD City

2.7% 1 DC NW (Hillandale) Resident Individual 3 = 231 Complaints

Individual 5

6.7% All Other VA Individuals 580 Complaints

1.8% All Other MD Individuals 159 Complaints

79.0% 1 DC NW (Foxhall) Residence* 2 Individuals: Individual 1 = 6500 Complaints Individual 2 = 352 Complaints

mwaa.com

28

Reagan National (DCA) Noise Complaint Statistics - Continued Figure 27: DCA 2015 Complaint Statistics

Complaints per Individual

# of Individuals

# of Complaints

% of All Individuals

% of All Complaints

1

202

202

61.2%

2.3%

2

41

82

12.4%

0.9%

3

24

72

7.3%

0.8%

4

11

44

3.3%

0.5%

5

8

40

2.4%

0.5%

6

5

30

1.5%

0.3%

7

1

7

0.3%

0.1%

8

2

16

0.6%

0.2%

9

1

9

0.3%

0.1%

10

3

30

0.9%

0.3%

11

5

55

1.5%

0.6%

12

1

12

0.3%

0.1%

15

1

15

0.3%

0.2%

16

2

32

0.6%

0.4%

18

2

36

0.6%

0.4%

20

1

20

0.3%

0.2%

21

1

21

0.3%

0.2%

22

1

22

0.3%

0.3%

24

2

48

0.6%

0.6%

25

1

25

0.3%

0.3%

26

1

26

0.3%

0.3%

27

1

27

0.3%

0.3%

28

1

28

0.3%

0.3%

30

1

30

0.3%

0.3%

36

1

36

0.3%

0.4%

37

1

37

0.3%

0.4%

47

1

47

0.3%

0.5%

49

1

49

0.3%

0.6%

81

1

81

0.3%

0.9%

92

1

92

0.3%

1.1%

108

1

108

0.3%

1.2%

208

1

208

0.3%

2.4%

231

1

231

0.3%

2.7%

352

1

352

0.3%

4.1%

6500

1

6500

0.3%

75.0%

2015

mwaa.com

29

Dulles International (IAD) 2015 Outreach Summary Throughout 2015, the Airports Authority continued its ongoing effort to preserve land-use controls around Dulles International. Airports Authority personnel conducted meetings and briefings with the Loudoun County Board of Supervisors, other elected officials, community members and the Dulles Area Association of Realtors to emphasize the need to maintain existing county regulated land-use protections known as the Loudoun County Airport Impact Overlay District. The Loudoun County Airport Impact Overlay District was implemented by the Loudoun County Board of Supervisors in the early 1990s to prevent residential development in aircraft noise impacted areas close to Dulles International. The Airports Authority remains committed to preserving the existing regulatory restrictions and opposes any residential development in close proximity to or on Dulles International Airport. This position adheres to FAA policy regarding land-use on or near federally sponsored airports. Federal policy states that residential development located on or in close proximity to airports, specifically near runways and flight paths, is deemed incompatible with airport use and should not be permitted by airport operators or local governments. The Airports Authority strongly supports the Loudoun County Airport Impact Overlay District, which prohibits residential construction within the 65 DNL Aircraft Noise Contour, and is committed to working with all county officials to prevent residential development within federally defined non-compatible areas.

2015

mwaa.com

30

Dulles International (IAD) Arrival and Departure Routes

Dulles International operations are influenced by FAA’s Next Generation Air Transportation System program (NextGen IAD). NextGen’s objective is to improve air travel safety and efficiency by redesigning the airspace, improving the collection/distribution of air traffic data, and introducing performance-based satellite navigation. In the D.C. Metroplex, several new satellite navigation Standard Arrival (STAR) and Standard Instrument Departure (SID) procedures were implemented throughout 2015. All aircraft movements are controlled by the FAA, including the operational direction - North Flow or South Flow. As a safety factor, aircraft arrive and depart into the wind to maximize aerodynamic lift. FAA uses Air Traffic Control reports, pilot observations and National Weather Service data to determine airfield and enroute wind/weather conditions as the primary basis for directional flow.

2015

mwaa.com

31

Dulles International (IAD) D.C. Metroplex (NextGen): Standard Arrivals and Standard Instrument Departures IAD Standard Arrivals (STARs - blue) and Standard Instrument Departures (SIDs – red) (Figures 28 – 29). Figure 28: IAD North Flow STARs AND SIDs1

Figure 29: IAD South Flow STARs AND SIDs1

1

Source: FAA, PBN Programs and Policy Group, 09 Mar 2016

2015

mwaa.com

32

Dulles International (IAD) Runway Utilization Figures 30 - 31 provide approximate arrival and departure runway utilization percentages.

Figure 30: IAD Runway Utilization - Arrivals

2.7% Arr RW19R

19R

Figure 31: IAD Runway Utilization - Departures

25.5% Arr RW19C

0.1%

5.4%

Dep RW1L

Dep RW1C

19R

19C

19C

16.6% Arr RW19L

9.4% Dep RW1R

19L

19L 0.2%

68.1%

Arr RW12

12

Dep RW30

1L

12

1L 1C

1C 30 2.2%

0.1%

0.4%

Arr RW1L

29.4%

30

0% Dep RW12

Dep RW19R

Arr RW30

3.7%

1R

Dep RW19C

1R 13.2%

Arr RW1C

Dep RW19L

22.9% Arr RW1R

2015

mwaa.com

33

Dulles International (IAD) Typical Daily Flight Track Map On a typical day, approximately 4,000 aircraft operate in the metropolitan Washington airspace. Aircraft operate to/from more than a dozen airfields including commercial, general aviation and military:  Commercial: Reagan National, Dulles International, Baltimore-Washington International  General Aviation: College Park, Leesburg Executive, Manassas Regional, Montgomery Air Park  Military: Andrews Air Force Base, Ft. Belvoir-Davidson Army Airfield, Joint Base Anacostia-Bolling, Quantico Marine Corps Airfield In 2015, Dulles International experienced a daily average of 385 arrivals and 382 departures. Figure 32 depicts typical 2015 Dulles International arrivals (blue) and departures (red) during a 24-hour period. Overflights (green) are aircraft operating in the airspace but not at Dulles International. Figure 32: IAD Typical Daily (24-hour), Mixed Flow Operations

IAD

11/12/2015: Arrivals (416), Departures (433), Overflights (2597)

2015

mwaa.com

34

Dulles International (IAD) Daily Average Operations by Hour In 2015, Dulles International experienced a daily average of 385 arrivals and 382 departures. Figure 33 provides the daily average arrival and departure counts by hour. Figure 33: IAD Daily Average Operations by Hour IAD 2015 Average Daily Arrivals and Departures by Hour 60

50

Daily Average

40

30

20

10

0

0a

1a

2a

3a

4a

5a

4.7

2.5

1.3

0.5

0.7

4.9 14.6 23.4 9.8

Departures 2.6

1.4

0.9

0.3

0.3

2.2

Arrivals

6a

7a

8a

9a 10a 11a 12p 1p

2p

3p

4p

5p

6p

7p

8p

9p 10p 11p

9.3 14.6 38.9 12.7 15.9 21.3 48.8 38.2 18.9 16.6 14.4 33.3 20.3 9.7

8.9 10.1 41.3 18.8 12.9 10.3 35.9 24.7 12.8 13.6 15.6 54.0 35.2 17.4 9.5

9.7

6.6 37.3 9.8

Hour

2015

mwaa.com

35

Dulles International (IAD) Quarterly Track Density Plots A Track Density Plot graphically illustrates the frequency of aircraft movements over a defined area during a specified time period. It is an effective method to show arrival and departure corridors, or changes in flight procedures. A regional grid map is defined and each grid is color-coded based on the number of times (frequency) an aircraft passed through that grid (Figure 34). The 2015 IAD Quarterly Track Density Plots illustrate Dulles International flight procedures in the D.C. Metroplex:  

Figures 35 – 38: Arrivals Figures 39 – 42: Departures

Figure 34: Track Density Grid Colors based on Aircraft Frequency Count

2015

mwaa.com

36

Dulles International (IAD) Quarterly Track Density Plots – 2015 Arrivals Figure 35: 1st Quarter

Figure 36: 2nd Quarter

Figure 37: 3rd Quarter

Figure 38: 4th Quarter

2015

mwaa.com

37

Dulles International (IAD) Quarterly Track Density Plots – 2015 Departures Figure 39: 1st Quarter

Figure 40: 2nd Quarter

Figure 41: 3rd Quarter

Figure 42: 4th Quarter

2015

mwaa.com

38

Dulles International (IAD) Aircraft Fleet Mix Percentages Figures 43 - 45 show the average annual fleet mix percentages by aircraft type. Figure 43: IAD Annual Average Fleet Mix by Aircraft Type

Figure 44: IAD Top 25 Fleet Mix

Aircraft Type

Aircraft Category

2015

A319

Narrow-body Jet

1.6%

A320

Narrow-body Jet

6.0%

A321

Narrow-body Jet

0.3%

A330-200

Wide-body Jet

0.4%

A330-300

Wide-body Jet

0.8%

A340-300

Wide-body Jet

0.2%

A340-600

Wide-body Jet

A380-800

Wide-body Jet

B717-200

Narrow-body Jet

0.6%

B737-700

Narrow-body Jet

2.6%

B737-800

Narrow-body Jet

4.4%

B737-900

Narrow-body Jet

6.3%

B747-8

Wide-body Jet

0.3%

B777-300ER

1.5%

B757-200

Narrow-body Jet

2.1%

B767-300

1.6%

B767-300

Wide-body Jet

1.6%

A319

1.6%

B767-400

Wide-body Jet

0.5%

B777-200

Wide-body Jet

3.2%

B777-300ER

Wide-body Jet

1.5%

B787-9

Wide-body Jet

0.2%

BE40

General Aviation

0.7%

C56X

General Aviation

1.5%

C680

General Aviation

C750

General Aviation

CL30

General Aviation

1.3%

CL60

Regional Jet

1.7%

CRJ2

Regional Jet

0.3%

E170

CRJ7

Regional Jet

13.3%

B777-200

CRJ9

Regional Jet

2.2%

GLF5

0.9%

F2TH

0.9%

GLF4

1.1%

0.2%

H25B

1.2%

0.3%

CL30

1.3%

E190

1.4%

C56X

1.5%

1.7% 1.9%

B757-200

2.1%

CRJ9

2.2%

0.8%

SF34

2.4%

0.9%

E45X

2.5%

B737-700

2.6%

DH8B

Turboprop

4.1%

Turboprop Turboprop

1.9% 0.9%

E145 E170

Regional Jet Regional Jet

10.4% 2.9%

E190 E45X

Regional Jet Regional Jet

1.4% 2.5%

E55P F2TH

General Aviation General Aviation

0.6% 0.9%

F900 GALX

General Aviation General Aviation

0.6% 0.7%

GLF4 GLF5

General Aviation General Aviation

1.1% 0.9%

H25B HELO

General Aviation Helicopter

1.2% 0.2%

LJ45 LJ60

Regional Jet General Aviation

0.6% 0.4%

MD10 MD82

Wide-body Jet Narrow-body Jet

0.4% 0.5%

MD83 MD88

Narrow-body Jet Narrow-body Jet

0.2% 0.6%

PA31 PC12

General Aviation Turboprop

0.9% 0.8%

SF34

Turboprop

2.4%

Aircraft Type

CL60 DH8C

DH8C DH8D

2015

IAD 2015 Top 25 Aircraft Types

2.9% 3.2%

DH8B

4.1%

B737-800

4.4%

A320

6.0%

B737-900

6.3%

E145

10.4%

CRJ7

13.3% 0%

5%

10%

15%

Annual Average Fleet Mix Percentage

mwaa.com

39

Dulles International (IAD) Aircraft Fleet Mix Percentages - Continued Figure 45: IAD Annual Fleet Mix

General Aviation

Turboprops

Helos/Military

IAD 2015 Annual Fleet Mix

Narrow/Wide-body Jets 35.8%

Narrow/Wide-body Jets

35.8%

Regional Jets

34.7%

General Aviation

17.9%

Turboprops

11.3%

Helos/Military

0.2%

Regional Jets 34.7%

2015

mwaa.com

40

Dulles International (IAD) Noise Monitor Program The first noise monitors were installed around Dulles International in 1978 when the FAA operated the airport. After consultation with the Metropolitan Washington Council of Governments, many of the noise monitors were located along the flight corridors that align with Dulles International runways. The Airports Authority continues to voluntarily upgrade and maintain the noise monitors around Dulles International without any external funding. The noise monitors provide aircraft and community noise levels near Dulles International as a public information resource. Federal law prohibits the use of noise monitor data for regulatory or enforcement purposes.

Noise Monitors and Noise Event Detection Criteria: Traditional Noise Event Detection Methodology: Prior to 2015, the Airports Authority’s noise monitors detected a noise event when the noise level exceeded a noise threshold for a minimum duration. During noise data post-processing, only detected noise events were correlated against aircraft position data. The traditional methodology had technological challenges:   

Quieter aircraft commonly generated noise levels that did not satisfy the noise event threshold criteria. Aircraft noise events could easily be contaminated by community noise sources (traffic, construction, community activities, nature – weather, animals, foliage). Lowering the noise event detection threshold did not account for increased background noise levels.

ANEEM - Aircraft Noise Event Extraction Methodology: As of 2015, the Airports Authority is the first U.S. airport system to upgrade its noise monitoring software using a new noise event detection methodology called ANEEM (Aircraft Noise Event Extraction Methodology), provided by Bruel & Kjaer EMS. ANEEM does not solely rely on the noise monitor to detect a noise event. During noise data post-processing, ANEEM cross-references databases to identify aircraft in the vicinity of the noise monitor when the noise level rises above the background level. It identifies and correlates aircraft-dominated noise events by comparing aircraft position data with predicted noise levels for that aircraft, using FAA noise certification data. ANEEM provides a more accurate detection methodology for distinguishing aircraft noise from other noise sources experienced in neighboring communities. It is very important to clarify that the “total noise” experienced at a noise monitor is unaffected by the choice of a noise event detection methodology. ANEEM only improves the accuracy of the noise source classification process. ANEEM noise event counts will be higher because ANEEM accounts for quieter aircraft and higher background noise levels. However, the “total noise” experienced at the noise monitor is consistent with legacy software.

2015

mwaa.com

41

Dulles International (IAD) Noise Monitor Locations Dulles International has 19 noise monitors positioned along flight corridors.

NMT

NMT Name

Address

City

ST

Zip

Jurisdiction

13

Broad Run Farms

20191 Youngs Cliff Rd

Sterling

VA

20165

Loudoun

14

Arcola

(Near 23930) Belmont Ridge Rd

Stoneridge

VA

20105

Loudoun

15

Sterling

Guilford Elementary School 600 W Poplar Rd

Sterling

VA

20164

Loudoun

16

Pleasant Valley GC

4715 Pleasant Valley Rd

Chantilly

VA

20151

Fairfax

Ashburn

VA

20147

Loudoun

Centreville

VA

22020

Fairfax

Chantilly

VA

20151

Fairfax

Sterling Park

VA

20196

Loudoun

Ashburn

VA

20147

Loudoun

Aldie

VA

22001

Loudoun

Clifton

VA

22024

Fairfax

Centreville

VA

22120

Fairfax

Chantilly

VA

20151

Fairfax

Herndon

VA

20171

Fairfax

Reston

VA

20194

Fairfax

Aldie

VA

20105

Loudoun

Ashburn

VA

20148

Loudoun

Ashburn

VA

20147

Loudoun

Leesburg

VA

20175

Loudoun

18

Ashburn ES

21

Sully Station

25

Chantilly

26

Countryside

27

Ashburn

28

Aldie ES

29

Union Mill ES

33

Virginia Run ES

34

Westfield HS

35

Crossfield ES

36

Armstrong ES

37

Mercer MS

38

Briar Woods HS

39

Stone Bridge HS

40

Sycolin Creek ES

2015

Ashburn Elementary School 44062 Fincastle Dr Cub Run Elementary School 5301 Sully Station Dr Chantilly Post Office 4410 Brookfield Corp Dr Algonkian Elementary School 20196 Carter Ct Broad Run High School 21670 Ashburn Rd Aldie Elementary School 23269 Meetinghouse Ln Union Mill Elementary School 13611 Springstone Dr Virginia Run Elementary School 15450 Martins Hundred Dr Westfield High School 4700 Stonecroft Blvd Crossfield Elementary School 2791 Fox Mill Rd Armstrong Elementary School 11900 Lake Newport Rd Mercer Middle School 42149 Greenstone Dr Briar Woods High School 22525 Belmont Ridge Rd Stone Bridge High School 43100 Hay Rd Sycolin Creek Elementary School 21100 Evergreen Mills Rd

mwaa.com

42

Dulles International (IAD) Noise Monitor Data In 2015, the Airports Authority upgraded its noise monitoring software to include a new noise event detection process called Aircraft Noise Event Extraction Methodology (ANEEM). ANEEM classifies aircraft, community and mixed noise events based on available aircraft position and flight plan data. Although ANEEM improves the noise source classification process, a noise event may occasionally be misclassified due to limited aircraft data. The 2015 monthly noise event data introduces several noise classifications and metrics: Noise % Time Total Monitor 2015 Online Leq # **DNL *Leq

Aircraft

Community

Mixed

Background (non-event)

# Min Modal Max # Min Modal Max # Min Modal Max *Leq *Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Lmax Lmax Lmax

*Leq

Noise Classification Descriptions:  Aircraft: Noise events correlated with aircraft position data.  Community: Noise events without correlated aircraft position data.  Mixed: Noise events attributed to correlated aircraft and community noise.  Background: Environmental noise not associated with aircraft or community noise. Noise Event Metric and Table Header Descriptions:  Aircraft DNL: A cumulative exposure metric that logarithmically calculates the average Aircraft dB(A) level over a 24-hour period, with a 10 dB penalty artificially applied to aircraft noise events occurring during nighttime hours (22:00 - 06:59).  The 10 dB penalty is equivalent to replacing ‘1’ nighttime aircraft noise event with ’10’ nighttime aircraft noise events.  dB(A): A-weighted decibel scale that adjusts (weights) low frequency ranges to model the response perceived by the human ear.  Leq: For Each Noise Classification: A cumulative exposure metric that logarithmically averages the varying sound energy over a defined period of time (month), and states it as a constant (equivalent) level for each noise classification type.  Lmax: A single event noise metric that represents the maximum (peak) dB(A) level  during a discrete noise event. Monthly peak levels are represented as:  Min (lowest peak), Modal (most common ‘whole #’ peak), Max (highest peak)  Total Leq: For All Noise Classifications: A cumulative exposure metric that logarithmically averages the varying sound energy over a defined period of time (month), and states it as a constant (equivalent) level for all noise classifications.  # Events: Number of noise events during the month for each noise classification type.  % Time Online: Percent of the month that the noise monitor was operational.

For noise event comparisons at a noise monitor location, the 2015 report provides: *Leq for direct comparison of ‘non-penalized’ aircraft, community, mixed and background noise. **Aircraft DNL Only since the 10 dB penalty is only applied to aircraft noise events (22:00 – 06:59).

2015

mwaa.com

43

Dulles International (IAD) Noise Monitor Data - Continued Noise data may not always be available for a specific site due to technical issues associated with the noise monitoring equipment, software anomalies, power, communications, site construction, vandalism and other factors.  

Gray: Missing or excluded data Yellow: Percent (%) Time Online less than 75% o 2015 (1st Quarter): Noise monitoring software and tele-communication upgrades resulted in data gaps.

Noise % Time Total Monitor 2015 Online Leq # DNL Leq 13 13 13 13 13 13 13 13 13 13 13 13 14 14 14 14 14 14 14 14 14 14 14 14 15 15 15 15 15 15 15 15 15 15 15 15

2015

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

68.5 99.5 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

67.4 62.5 54.4 57.4 60.5 56.7 59.2 57 55.6 56.1 57.1

48.3 51.7 53 52.9 54 52.8 51.3 50.3 51.4 51.6 52.6

45 48.4 49 49.2 49.6 49 47.8 46.7 46.2 48.5 49.4

68.5 99.8 99.9 99.3 99.9 99.9 99.9 99.9 99.9 99.9 99.9

67.1 67 66.8 67.5 67.1 66.9 67.1 67.6 67.7 67.5 67.6

54.2 56 56.5 57.9 57.4 58.2 57.7 57.9 57.4 57.5 57.9

51.6 53.2 53.7 55 54.7 55 54.8 54.9 54.6 54.8 55.2

70.1 99.7 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

56.2 56.5 58 60 59.2 60.2 59.3 59.3 57.5 57.8 56.3

40.9 43.6 46.9 45.3 46.4 45.5 45.1 44 40.5 44.5 42.4

38.3 39.9 42.1 40.8 41 40 40 39.5 34.8 40.1 40.1

Aircraft

Community

# Min Modal Max # Min Modal Max # Leq Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Hardware / Software Upgrade 1139 50.9 66 85.4 66.9 34699 50.60 64 100.9 44.7 234 3873 50.5 56 88.2 61.4 36015 50.20 62 112 49.5 492 4516 50.5 56 81.3 49.9 25937 50.20 54 93.9 38.7 390 5117 50.7 56 81 54.5 26033 50.40 54 96.6 41.1 511 4462 50.3 54 84.4 58.8 26749 50.40 54 108.7 42.9 571 4883 50.5 56 81.2 52.8 30985 50.20 62 97.8 40.5 665 3393 50.9 66 84.3 51.8 21187 52.30 62 98.9 40 538 3011 50.4 56 82.3 50.6 16067 52.40 62 100.9 37.5 328 2959 50.5 56 93.5 52.3 20332 52.40 62 105.3 39.9 325 3888 50.4 56 80.3 53 23307 52.50 64 91.2 39.6 414 4155 50.5 56 85.1 54.1 25288 52.40 64 95.8 42.5 597 Hardware / Software Upgrade 2011 50.9 72 91.8 65.5 72345 53.00 70 111.3 52.2 1744 4249 51.8 70 82.6 65.2 114678 52.90 70 108.8 55.9 3037 4339 51.4 70 85.2 65 112127 53.10 70 109.6 53.4 3186 4977 51.2 70 94 65.6 115702 52.80 70 108.7 54.6 3551 4986 51.6 70 85.7 65.1 114881 53.40 70 106.8 53.7 3074 5373 50.4 70 90.9 64.8 115612 52.60 70 107.1 53 3068 5197 52.2 70 85.4 65 113000 52.70 70 106.4 53.7 3191 4958 52.7 70 85.2 65.7 110587 52.60 70 108.2 53.8 3274 4516 50.9 72 86.7 65.7 114771 52.90 70 110.1 54.7 3562 4339 51.6 72 86 65.5 113688 52.50 70 108.3 55.5 3108 4424 51.1 72 90.5 65.6 118898 52.90 72 107.5 53.5 3090 Hardware / Software Upgrade 561 50.7 58 75.7 49.9 9033 50.70 56 88.9 29.2 26 1277 51.1 60 78.5 50.1 13776 50.10 56 89.4 38 120 1562 51.3 58 79.4 53.3 12527 51.90 56 107 35.2 135 1157 51 60 80.7 54 7334 50.90 56 109.9 37.5 98 978 51.9 60 82.8 49.6 6531 52.80 56 94.2 31.4 51 897 51.9 60 75.5 51.3 5321 52.90 64 95.7 35.3 65 879 51.7 62 75.7 47 4363 52.20 64 94.3 32.6 67 614 52.3 60 78.2 47.3 3712 52.20 56 92.4 31.8 39 244 51.6 60 77.6 47.9 7309 53.00 56 92.8 26.7 25 973 51.5 62 77.3 48.5 7445 52.90 57 89.2 33.2 83 1239 50.9 60 78.4 46.7 8260 53.40 56 93.3 30.5 72

mwaa.com

Background (non-event)

Mixed Min Modal Max Lmax Lmax Lmax

Leq

52.90 52.40 52.90 51.60 51.30 53.20 51.60 54.00 52.40 52.80 53.60

73 66 65 64 64 64 65 64 66 66 64

92.1 110.3 85.7 94.2 89.9 84.9 84.5 89.7 92 89.1 91.1

57.8 53.6 49.5 52.2 54 52.7 57.8 55.3 51.6 51 51.8

56.70 54.80 58.20 60.00 56.10 59.90 57.80 59.80 60.30 58.50 58.40

72 72 70 72 72 70 70 72 72 72 72

96.3 111.3 106.9 106.2 103.1 102.8 102.4 102.2 102.7 110.7 100.5

60.9 60.6 60.6 61.3 61.2 61.3 61.5 61.7 61.8 61.6 62

54.50 54.90 55.10 52.00 56.50 56.40 55.80 57.00 54.80 52.90 54.80

66 66 64 62 68 66 62 68 58 66 60

79.1 87.2 88.8 84.1 80 83.4 85 85.5 78.4 78.3 81.3

54.9 55.2 56 58.6 58.6 59.5 59 59 57 57.2 55.7

44

Dulles International (IAD) Noise Monitor Data - Continued Noise % Time Total Monitor 2015 Online Leq DNL Leq # 16 16 16 16 16 16 16 16 16 16 16 16 18 18 18 18 18 18 18 18 18 18 18 18 21 21 21 21 21 21 21 21 21 21 21 21 25 25 25 25 25 25 25 25 25 25 25 25

2015

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

64.9 99.8 99.9 99.8 99.9 99.9 99.9 98.8 99.9 99.9 99.9

50.6 54.8 56.3 55.5 53.8 56.7 62.3 55 52.5 51.4 49.4

41.8 45.5 48.9 48.9 50.2 47.7 47.4 47.4 49.3 45.9 46.6

38.9 42.9 45.7 45.1 45.4 44.2 44 44.4 47.6 43.6 43.3

69.6 99.8 99.9 50 64.9 99.9 99.9 99.9 99.9 99.9 99.9

57.8 58 58.8 58.8 57.7 57.1 57 57.7 58 57.4 57.9

47.6 49.1 50.9 50.8 50.6 50.2 51 51.7 53.8 50.8 50.8

43 44.6 46.3 46.6 45.9 45.6 46.2 47.9 50.5 46.9 46.4

64.9 99.8 99.9 99.8 99.9 100 99.9 100 100 100 99.9

53.4 71.6 90.5 94.9 76.9 62.6 62.2 62.1 62.3 61.8 63.6

51.1 52.6 53 48.7 54.2 53.8 54.4 54.7 56.4 53.2 54.8

47.8 48.4 49 45.6 50.3 50.2 50.1 50.7 52.4 49.6 50.3

65 99.8 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

56.8 59.5 59 60.1 57.3 56.9 56.1 56.2 54.7 56.6 56.7

54.8 56.1 58 57 56.1 56.5 55.4 55.1 48.7 55.4 55.9

51.2 52.7 54.6 53.5 52.9 52.8 52.1 52 45.5 52.3 52.3

Aircraft

Community

Mixed

Min Modal Max # Min Modal Max # Min Modal Max # Leq Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Lmax Lmax Lmax Hardware / Software Upgrade 78.4 56 51.30 82.8 29.8 82 54 1462 50.5 54 79.7 45.6 14041 50.20 86.2 57 54 113.1 30.6 168 51.50 2911 50.3 54 79.1 52.7 26132 50.20 86 58 54 105.3 33.5 245 52.10 3853 50.6 56 82.2 54.4 32430 50.30 80.1 55 54 103.3 31.7 132 51.50 3354 50.5 56 80.7 53.5 17832 50.30 95.7 58 50.40 56 106.6 36.5 77 3407 50.3 54 86.4 48.5 7779 50.00 90.3 66 58 101.4 36.7 211 54.00 2559 50.5 56 81.1 53.1 14727 50.10 70 102.5 62 107.2 49.7 345 53.50 2314 51.5 56 79.8 60.9 15861 52.50 79.6 58 99.2 33.8 106 50.70 56 2436 50.5 56 79.2 44.3 4148 52.00 83.1 66 83.3 39.3 264 54.30 56 4962 50.3 54 79.9 44.2 6669 52.00 79.9 56 86.3 33.8 109 51.00 54 3245 50.2 54 82.8 46.5 7071 52.20 75.9 56 84.6 28.6 103 52.20 54 2965 50.3 54 79.3 41.2 7205 52.30 Hardware / Software Upgrade 76.6 63 56.40 88.3 29.9 60 60 1103 51.3 62 76.1 51.4 26100 50.50 76.1 64 87 34.7 232 56.20 58 2414 50.8 62 77.8 49.2 35327 50.40 83.3 63 355 54.10 60 110.3 37 3034 51.6 62 80.5 54.6 34833 50.30 79.4 63 196 53.80 60 106.3 37 1617 52.1 62 79.1 53.4 14087 50.40 81.2 62 98.3 38.2 131 56.50 58 2076 51.2 60 77.5 51.8 22600 50.30 95 62 89.3 37.7 195 54.80 58 3420 51.2 60 78.6 49.5 34992 50.20 80.6 62 98 33.9 231 52.90 58 3389 50.7 60 85.7 48.4 26745 52.20 80 63 58 100.8 35.9 186 56.10 3488 50.4 62 85.8 50.2 26932 52.20 81.8 62 93.9 37.7 271 57.10 60 4553 51.4 62 81.2 49.2 28573 52.30 79.9 62 92.1 34.2 185 56.40 60 3000 52.1 62 78.6 50.3 35404 52.30 83.3 63 87.5 36.1 276 57.00 60 2712 51.1 62 83.4 49.5 27959 52.40 Hardware / Software Upgrade 82 66 85.6 36.8 174 51.20 54 2939 50.7 66 80.9 49.3 11818 50.30 66 105.9 54 115.1 53.8 377 52.20 4527 50.5 66 94.4 67.5 24711 50.20 68 123.2 58 126.5 73.8 813 51.80 4288 50.4 66 89.6 84.7 42256 50.30 80 127.9 66 131.4 72.5 844 55.50 1594 50.7 64 87.4 78.8 50030 50.80 71 118.9 58 123.9 59.3 494 57.00 4768 50.5 70 85.6 76.2 39880 50.40 79.8 71 180 53.70 97.3 38 56 5111 50.5 68 85.7 49.5 11325 50.20 86.2 66 85.5 39.4 161 51.80 56 5088 50.4 70 84.3 44.8 4955 52.40 82.4 67 86.1 37.2 197 55.70 58 5780 50.5 66 82.4 46.9 9372 52.30 82.7 66 86.9 38.6 232 51.90 58 7216 50.6 66 82.3 49.1 13548 52.10 85.8 70 87.9 37.4 189 50.70 56 5370 50.4 68 83.6 44.4 7274 52.50 99.2 70 99.2 48.9 224 51.20 56 5081 50.3 54 82.3 58.1 10556 52.30 Hardware / Software Upgrade 83.1 68 94.1 37.9 234 51.80 56 85 52.7 21450 50.20 3512 50.6 68 96.6 69 58 104.4 41.6 458 52.90 5788 50.6 68 94.1 57 30047 50.20 85.3 69 94.3 42.7 527 52.10 60 6394 50.5 70 91.7 53 34515 50.40 84.8 68 58 113.6 39.7 349 53.20 5449 50.4 70 90.8 57.2 37662 50.50 92.5 68 58 104.2 40.8 399 52.20 6260 50.6 68 86.7 51.7 37460 50.50 86.9 67 94.8 39.6 306 52.80 58 5738 50.6 68 91.8 50.2 30617 50.40 84.3 68 86 39.6 349 52.50 58 87 48.3 17970 52.40 5451 50.3 68 78.9 68 89.7 39.3 353 53.80 58 5377 50.2 68 85.8 48.9 17309 52.40 81.2 64 88.6 37.6 418 52.20 58 88 49 20227 52.40 4210 50.5 56 82.7 68 90.9 39.8 433 50.50 58 5690 50.6 68 86.4 49.4 19632 52.50 83.9 68 90.2 39.6 437 50.50 58 5472 50.5 68 87.1 50.3 23372 52.30

mwaa.com

Background (non-event) Leq 48.5 49.7 50.4 49.9 51.1 53.7 55.4 54.1 49.3 48.3 47.1 56.5 57.1 56.3 56.9 56 55.8 55.9 56.2 56.3 55.9 56.8 48.3 69.3 89 94.8 68 62.1 61.8 61.6 61.6 61.4 61.6 51.9 53 54.5 54.2 52.6 52.6 52.2 52.3 52.4 52.7 52.7

45

Dulles International (IAD) Noise Monitor Data - Continued Noise % Time Total Monitor 2015 Online Leq DNL Leq # 26 26 26 26 26 26 26 26 26 26 26 26 27 27 27 27 27 27 27 27 27 27 27 27 28 28 28 28 28 28 28 28 28 28 28 28 29 29 29 29 29 29 29 29 29 29 29 29

2015

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

65.8 99.8 99.9 99.8 99.9 99.9 99.9 99.9 99.9 99.9 99.9

53 54.1 56.8 56.8 54.8 53.3 52.5 53 53 52.6 52.9

39.1 43.3 45.6 45.3 43.9 44.3 44.2 42.5 40.3 43.2 42

35.7 38.5 40.4 41 39.3 39.6 39.4 37.3 36.1 39.1 38.9

Aircraft

Background (non-event)

Mixed

Community

Min Modal Max # Min Modal Max # Min Modal Max # Leq Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Lmax Lmax Lmax Hardware / Software Upgrade 63.7 56 55.50 83.7 17.6 11 56 390 50.8 55 80.2 47.4 10259 50.50 69.9 58 53.70 82.8 24.6 70 56 919 50.5 58 78.7 41.6 7801 50.60 79.3 60 53.30 58 106.3 29.4 82 82 50.4 5662 53.20 812 52.1 62 78.7 60 52.50 58 110.2 29.3 78 1268 51.7 56 75.8 52.2 4287 52.90 74.1 59 53.80 97.4 27.4 62 56 993 51.2 56 75.5 46.3 5236 51.80 82.6 58 51.30 95.8 29.5 81 56 1264 50.5 56 79.9 42.6 5256 52.30 78.4 53 50.60 86.2 25.8 65 56 1232 50.2 56 78.3 40.7 4297 52.60 72.9 57 53.80 87.7 23.7 40 58 725 51.6 56 75.8 40.1 3716 52.70 71.4 60 54.80 82.7 22.8 41 56 477 50.9 58 75.4 43.5 12066 52.30 68.7 57 80.7 25.5 105 51.70 55 1333 50.5 56 75.6 43.3 15522 52.20 75.8 58 82.1 28.4 153 54.00 56 1375 50.8 58 76.9 43.7 18374 52.10

Leq 51.5 53.7 55.5 54.8 54 52.7 52 52.6 52.4 51.8 52.1

Hardware / Software Upgrade 23.9 99.9 99.5 99.9 99.9 99.9 99.9 99.9 99.9 99.9

63.4 53.2 60 52.2 52.5 53.2 54.5 55.3 53.2 53.2

48.6 48.4 45.1 46.1 46.2 46.6 47.5 50.2 47.4 47.2

43.8 43.1 40.4 41.5 41.2 42 43.8 46.7 42.5 42.5

497 1875 1340 1501 1570 1548 2113 3928 1863 1619

51.3 50.5 50.7 50.2 50.5 50.6 50.5 50.6 50.5 50.6

64.9 99.8 99.9 66.9

46.2 47.7 52 62.3

29.8 35.2 34.8 34.6

26.2 30.8 32.9 32.9

121 461 797 431

50.7 50.7 50.4 50.5

68.7 99.9 99.9 99.9 99.9 99.9

55.4 51.8 50.9 49.2 47.3 46.5

37.6 37.7 36.6 35.7 34.5 38.9

34.7 33.8 33.9 32.8 32.7 38.5

701 877 764 822 656 605

50.6 50.4 50.5 50.4 50.5 50.5

64.9 99.8 99.9 99.9 99.9 99.9 99.5 99.9 99.9 99.9 99.9

54 50.5 53.2 57.9 60.5 59.9 58.2 58.6 51.2 50.4 49.5

44.9 45.2 46.4 45.8 45.4 46.6 46.5 46.1 43.9 45.6 45.9

40.9 41.9 43.1 42.8 42.2 42.4 42.7 42.2 40.3 42.9 42.9

1412 2348 2930 1926 1911 1904 2035 1760 1030 2635 2623

50.7 50.5 50.5 50.4 50.5 50.3 50.4 50.7 50.6 50.7 50.5

56 80.6 60 6759 50.20 60 83.6 47.2 19240 50.60 60 79.5 54.1 11960 50.70 83 45.1 7415 50.60 60 54 86.1 45.9 11154 50.40 62 76.7 46 12360 52.50 60 82.6 49.9 11875 52.20 60 84.5 49.7 16150 52.40 58 81.8 47.2 13179 52.30 58 80.7 47.3 16740 52.60 Hardware / Software Upgrade 55 68.1 40.1 3301 50.20 54 72.9 41.8 6004 50.40 54 76.5 49.7 10250 50.40 53 76.2 61.6 6669 50.40

58 58 58 58 58 62 60 60 58 60

96.1 96.6 100.4 98.7 87.5 86.9 107.3 84.7 87.2 90.9

36.2 33.5 32.3 27.1 32.1 31.9 32.9 38.6 33.9 32.2

120 320 265 89 217 293 234 391 221 317

51.40 51.50 52.30 52.20 51.80 51.30 52.50 51.80 51.00 52.00

59 61 58 60 60 62 59 60 60 62

76.5 78.2 85.9 80.3 83 79.5 76.1 82 76.2 75.8

60.6 51.2 58.6 50.7 50.9 51.8 52 52.8 51.4 51.3

54 54 54 54

84 85.2 99.4 111.4

19.9 26.7 30.8 44.6

19 84 183 93

54.80 52.80 51.70 52.60

61 60 57 60

67.8 76.3 81.9 99.1

44.9 46.3 48 53.4

52 74.6 54.2 3645 50.10 54 77.1 47.6 3049 52.20 52 78.4 43.6 3547 52.10 54 71.1 42.6 4170 52.20 53 72.1 40.1 2687 52.20 54 89.2 38.4 1984 52.30 Hardware / Software Upgrade 56 75.9 52 9303 50.50 58 82.9 45.6 13966 50.40 58 79.2 50.9 16037 50.30 81 51.5 8552 50.20 58 56 79.5 51.8 5994 50.30 58 81.2 45.4 3574 50.10 58 82.3 43.7 2270 52.30 58 82.7 41.7 3985 52.40 58 80.2 42.6 8938 52.60 58 80.3 41.5 7515 52.20 58 83.8 41.7 6754 52.80

52 56 58 56 56 56

108.3 99.6 86 87.3 85.1 84.6

32.8 31.1 26.5 28.2 26.8 26

71 105 83 119 86 54

51.50 52.60 51.70 52.90 51.70 51.70

55 59 60 60 57 58

77.6 75.6 76.5 75.4 81 83.4

48.8 49.5 49.9 47.9 46.1 44.8

56 58 58 58 54 56 56 60 58 60 58

89.6 87.6 109.1 105.7 108.6 102.8 101.5 86.6 84.6 86.7 87.3

36.3 31.1 32.9 28.3 30.3 26.4 30.1 29.4 26 30.7 31.2

148 159 150 79 66 39 64 73 63 115 154

52.90 52.50 54.30 54.00 51.10 54.30 51.90 52.40 53.10 53.10 53.30

68 64 63 65 61 62 63 62 64 62 63

82.4 77.2 83.4 81.8 77.3 75.6 74.6 79.9 74.5 86.3 78.4

48.7 47.7 48.1 56.6 59.8 59.7 57.9 58.4 50.1 48.7 47.3

mwaa.com

46

Dulles International (IAD) Noise Monitor Data - Continued Noise % Time Total Monitor 2015 Online Leq DNL Leq # 33 33 33 33 33 33 33 33 33 33 33 33 34 34 34 34 34 34 34 34 34 34 34 34 35 35 35 35 35 35 35 35 35 35 35 35 36 36 36 36 36 36 36 36 36 36 36 36

2015

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Background (non-event)

Mixed

Community

Aircraft

Min Modal Max # Min Modal Max # Min Modal Max # Leq Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Lmax Lmax Lmax

Leq

Hardware / Software Upgrade 27.5 99.9 96.6 99.9 99.9 99.9 99.9 99.9 99.9 99.9

59.3 52.5 56.2 54.2 52 50.3 50.9 51 50.5 50.2

44.5 46.2 46.8 46.1 46.1 45.9 46 46.9 44.9 44.8

41.7 43 43.6 42.5 42.7 42.2 42.1 44 42 41.8

756 2802 2374 2382 2486 2768 2908 4633 2727 2425

50.7 50.2 50.5 50.4 50.5 50.5 50.2 50.6 50.3 50.6

54 56 54 54 54 54 54 54 54 54

74.1 81.5 81.3 80.8 80 80.4 74.8 76.5 77.5 79.1

58.1 46.1 54.5 49.7 45.1 38.2 41.9 41.9 41.4 41.4

6882 22633 14086 10247 10866 3426 6327 10441 9938 10137

50.50 50.30 50.50 50.10 50.10 52.30 52.20 52.20 52.20 52.40

56 54 54 54 54 56 60 56 56 54

103.9 88.2 108.8 105.3 97.3 81.7 93.6 78.1 81.4 83.9

31 32 31.1 26.2 28.2 25.7 30 33.8 27.3 29.6

57 242 137 69 71 45 127 287 93 134

54.10 52.60 52.10 53.50 51.30 52.40 52.70 51.50 52.00 51.20

62 64 60 64 64 70 60 64 61 62

76.2 74.6 89.8 70 87.7 76.6 72.9 76.5 75.2 80.2

52.8 50.7 50.6 51.8 50.3 49.2 49.5 49.2 49.1 48.8

58 60 54 54 58 58 58 56 56

90.9 109.3 104.7 94.9 84.9 101.7 85.5 86.2 85.4

43.4 46.8 42.1 36.9 38.8 42.2 41.7 40.1 41

468 307 412 209 313 413 213 514 480

52.40 51.50 52.10 52.50 52.80 52.70 53.30 51.60 52.10

60 58 70 59 59 60 71 58 60

82.7 95.3 87.6 82.1 81.8 90.1 84.6 82.8 89.7

61.6 61.3 59.7 52.4 52.2 53 52.8 52.4 52.1

60 60 60 60 60 60 60 60 60 60 60

82.9 85.5 106.9 108.6 107.5 105.4 83.4 94.8 78.7 79.2 85

28.4 32.1 35.4 34.5 30.8 28.3 28.9 32.2 32.9 32.9 31.3

25 124 191 155 90 74 89 118 148 137 97

56.60 55.30 56.10 55.10 56.10 56.40 54.80 54.90 54.80 56.20 53.70

72 60 66 65 62 59 60 63 64 64 62

75.5 83 82.8 85.1 77.4 76.1 79.1 77.8 75.7 76.4 77.5

52.3 52.4 53 53.1 53 52.5 52.2 52.6 52.6 52.7 52.6

58 58 58 56 58 56 56 58 58 58 58

87.9 91 107.5 108.2 95.7 95.6 88.2 89.6 87.3 87.4 89.4

32.2 35.8 39.3 37.6 35.4 33.8 33.6 35.4 36.5 36.9 36.5

97 335 516 490 275 292 304 299 383 350 387

55.30 54.30 54.90 53.10 54.60 55.50 53.00 55.00 55.00 54.80 54.00

58 60 60 60 60 58 59 60 59 60 60

77.3 77.2 79.9 89.9 88.3 79.8 83.6 81.5 81.2 84.2 78.9

52.1 51.9 53.8 51.9 52.3 52 52.1 51.9 52.5 52.7 52.9

Hardware / Software Upgrade 57.1 95.1 99.9 99.9 99.9 99.9 99.9 99.9 99.9

62.5 62.8 61.6 56.4 56.4 57.3 57.9 56.4 56

58.3 56 56.8 57.3 57.9 58.3 59.7 56.7 56.4

54.2 52.3 52.5 53.5 53.7 54.2 55.5 53.2 52.5

3945 4298 4980 5437 5661 6016 7540 5440 4922

50.5 50.8 50.7 50.4 50.9 50.2 50.8 50.3 50.6

64.8 99.8 99.9 99.3 99.9 99.9 99.9 99.9 99.9 99.9 99.9

53.6 53.4 55.6 56.8 55.6 54.1 52.9 53.7 53.6 53.7 53.4

45.4 45.8 47.4 47.4 46.8 47 46.8 47.6 47.2 46.6 46.4

41.7 42.7 44.2 43.8 43.5 43.5 43.5 44.4 44.5 44.1 43.5

1662 3169 3649 3612 3548 3563 3409 3639 3809 3327 3118

50.6 50.8 53.1 52.2 52.6 53.7 52.6 53.4 53.3 53.4 53.6

64.5 99.7 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

54.8 54.4 57 56.8 54.6 54.1 53.9 54 54.8 55 55.2

46.8 47.5 49.2 49.1 48.2 48.5 48.7 48.7 48.8 48.3 47.9

44.1 45 46.1 45.8 45.2 45.2 45.4 45.8 46.3 45.9 45.6

2015 3816 4303 4836 4306 4755 4612 4555 4538 3852 3719

51.7 50.9 51.1 51.1 51.5 51.1 50.9 51.8 50.6 51 51.6

70 85.8 47.9 13796 50.40 69 86.3 55.4 18550 50.40 70 86.5 55 18513 50.20 70 87.5 45.2 15979 50.20 70 86.9 45 14640 52.30 70 89.4 47.9 15878 52.20 86 47 21030 52.30 70 68 90.5 46.3 19632 52.40 85 46.7 21693 52.30 70 Hardware / Software Upgrade 60 77.2 46.5 7499 51.00 60 79.7 43.7 8130 51.20 62 78.3 51.2 7610 52.50 60 80.6 54 6482 52.00 60 76.6 51.4 5174 51.80 60 74.7 47.4 3073 50.20 60 77.3 36.6 1560 52.20 62 77.3 43.4 4177 53.10 62 78.1 42.1 5192 55.30 60 82.3 43 4918 55.50 60 78.7 41.3 3408 52.50 Hardware / Software Upgrade 60 77.1 50.6 33687 50.50 60 78.8 49.3 50948 50.20 62 77.3 53.3 49940 50.30 60 78.6 54.4 42263 50.40 60 80.2 49.3 34696 50.20 60 76.3 48 33570 50.40 60 83.9 46.8 27803 52.40 77 47.3 28426 52.20 60 62 84.5 48.9 38219 52.50 62 76.2 49.4 41883 52.30 60 78.3 49.8 45256 52.40

mwaa.com

47

Dulles International (IAD) Noise Monitor Data - Continued Noise % Time Total Monitor 2015 Online Leq DNL Leq # 37 37 37 37 37 37 37 37 37 37 37 37 38 38 38 38 38 38 38 38 38 38 38 38 39 39 39 39 39 39 39 39 39 39 39 39 40 40 40 40 40 40 40 40 40 40 40 40

2015

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

65 99.8 99.8 92.9 47.8 95.3 99.6 99.9 99.9 99.9 99.9

57.5 53.8 56.3 57.6 55.8 59.2 54.5 55.7 64 66.5 66.2

51.9 53.7 55.1 55.2 54.3 53.9 55 54.5 56.3 55.9 56.6

49.2 49.7 50.8 50.7 51 49.9 51 51.1 53.5 53 52.7

64.9 99.8 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

57.6 52.8 54.8 53 53.4 56.6 54.4 54.9 55.1 52.5 52.4

50.2 51.2 53 53 52.6 52.7 52.6 52.5 51.8 51.6 52.1

45.4 46.6 48.4 47.7 47.6 47.8 47.7 47.7 47.4 47.3 47.6

58.3 79.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

53.4 50.7 56.1 55.5 54.1 54.1 55.5 54.4 58.4 54.7 55.9

45.1 46.1 47.6 47.8 44.9 46.6 47.2 46.7 47.5 47.1 46.7

39.9 40.6 42.1 41.8 40.4 40.7 41.5 41.7 43.2 42 41.7

64.9 99.8 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9 99.9

53.5 54.1 56.7 59.5 52.1 51.2 51.2 52.5 51.3 51.1 51

46.1 47.2 48.2 46.9 48.5 49 48.7 48.4 46.5 47.8 49.4

41.3 43.1 44.6 43.2 44.3 44.8 44.4 44.2 42.9 44.2 44.9

Aircraft

Community

Mixed

Min Modal Max # Min Modal Max # Min Modal Max # Leq Leq Events Lmax Lmax Lmax Events Lmax Lmax Lmax Events Lmax Lmax Lmax Hardware / Software Upgrade 88 70 55.70 90.2 37.5 43 58 2296 50.2 60 84.6 55.2 13987 50.50 91.7 58 52.00 83.7 36.3 98 58 4304 50.6 64 84.9 46.8 15294 50.60 80.8 62 56 107.6 31.1 127 55.10 4033 50.3 66 85.6 52.2 20552 50.40 71 62 55.30 56 109.1 28.2 74 3791 50.4 62 86.7 54.8 10404 50.80 73.7 66 55.20 96.1 25.7 19 54 64 84.6 47.7 3171 50.50 1944 51 77.6 59 55.60 54 111.6 27.9 34 3404 50.2 64 83.2 55.2 9024 50.20 80.3 58 52.20 83.9 25.2 42 58 4204 50.5 64 85.9 42.6 4856 52.30 84.2 65 56.70 60 103.6 31.4 53 4339 50.7 64 85.9 47.8 6696 52.50 90 78 101 48.6 622 55.80 64 5418 50.4 66 86.9 61.9 55792 52.60 91.1 75 94.2 51.6 675 53.80 62 90 65.1 61284 52.70 4092 50.4 64 89.1 76 98 50.2 599 55.00 62 3915 50.3 64 88.3 64.7 53272 52.50 Hardware / Software Upgrade 86.5 69 52.30 89.6 36.8 31 56 58 82.7 55.4 19075 50.50 1296 51 73.9 62 55.50 88.2 26.1 26 56 2780 50.5 62 81.1 47.4 25440 50.20 74.7 66 53.70 40 105 28 58 2943 51.2 62 83.7 50.4 23723 50.20 75.4 67 56.70 29 82.7 26 58 3353 50.8 62 82.7 45.2 15995 50.30 77.3 75 54.70 56 105.4 26.7 20 2836 50.5 60 92.6 47.4 11472 50.40 81.7 64 53.10 56 109.5 28.9 25 3011 50.6 62 83.8 53.5 11799 50.30 77 70 51.60 93.5 30.9 43 58 2968 50.6 62 83.8 49.2 12919 52.30 82.7 72 55.20 48 56 101.2 33 2800 50.5 62 81.5 50.4 15123 52.60 78.7 75 52.70 82.5 34.9 57 56 84 50.6 18445 52.20 2439 50.5 62 72.3 58 55.70 92.3 21.7 22 56 2786 50.5 62 82.7 45.5 15256 52.50 79.4 59 52.20 30 87.9 26 56 2970 50.4 62 82.5 44.5 13236 52.40 Hardware / Software Upgrade 74.5 69 56.50 86 25.3 16 56 743 50.5 58 77.2 50.4 13607 50.50 73.7 56 53.50 79.2 21.1 15 56 1169 50.8 56 76.1 43.8 11772 50.50 69.4 65 51.50 58 110.7 24.7 44 1464 50.7 60 79.4 54 16796 50.30 74.9 61 55.20 60 105.1 23.2 25 1165 51.2 62 79.5 50.4 8132 50.30 68.9 62 57.00 95.2 20.5 16 54 1065 50.8 60 78.5 44.1 5573 50.30 67.5 60 51.80 93.1 22.2 29 62 1135 50.8 60 77.4 43.6 6096 50.20 70.9 62 51.90 89.6 22.8 20 60 1264 50.6 60 79.7 43 4518 52.20 75.5 61 52.30 90.7 25.3 40 62 60 79.7 45.4 7785 52.50 1264 51 95.3 60 60 103.4 38.9 182 50.90 1815 50.5 62 77.6 55.5 17367 52.30 79.7 66 52.20 92 90.6 31 60 1378 50.9 60 77.2 50.1 24418 52.20 77.1 56 52.30 75 96.1 29 60 1197 50.7 60 79.8 52.2 24025 52.40 Hardware / Software Upgrade 76.7 68 54.60 84.4 32.8 72 56 890 50.9 56 80.1 50.4 14308 50.30 83.7 68 94.1 37.1 221 53.00 56 58 80.6 50.9 23085 50.30 2344 51 72 106.2 95.1 46.8 322 51.90 60 2609 50.9 58 84.6 52.7 25235 50.30 82 66 52.80 60 108.8 33.4 89 2298 50.3 60 79.2 52.1 12246 50.10 76.8 64 51.80 81 97.1 30 54 2917 50.7 56 79.7 45.6 9757 50.20 83.6 63 52.90 87.4 29.3 60 56 86 42.4 6654 50.30 3309 50.5 56 83.7 59 50.80 76 93.7 32 56 3065 50.3 56 79.4 42.2 4476 52.40 81.4 62 51.90 62 101.4 31.7 83 2593 50.3 58 79.4 44.6 4738 52.30 81.8 61 84.8 32.3 110 51.50 56 2450 50.6 58 80.6 42.2 6289 52.40 80.8 64 51.00 83.2 30.6 88 58 83 42 7053 52.20 2786 50.4 56 82.1 62 51.40 99 81.4 29 56 82 41.6 7026 52.20 3161 50.5 58

mwaa.com

Background (non-event) Leq 51.7 49.8 51.4 51.7 52.9 56.1 51.4 52.6 58.1 59.6 59.7 52.7 49.5 50.8 50.3 50.3 52.3 51.3 51.4 51.8 49.4 49.4 49.9 49.1 51.4 53.7 53.4 53.5 55.1 53.5 54.8 52.4 53.2 49.9 50.4 53.1 58.5 49.9 49.2 49.4 50.8 49.9 49.3 49

48

Dulles International (IAD) Noise Complaint Statistics In 2015, the Airports Authority received 1,223 complaints from 94 individuals that were associated with Dulles International (Figures 46 – 48). The majority of individuals (70.2%) submitted one complaint. Figure 47: IAD 2015 Complaints - Top 5 Individuals

Figure 46: IAD 2015 Complaint Statistics VA City

# of Individuals

# of Complaints

7

34

Aldie Arlington

2

3

Ashburn

26

43

Brambleton

1

3

Centreville

7

13

Chantilly

8

35

Clifton

2

5

Fairfax

7

11

Fairfax Station

1

1

Gainesville

1

1

Great Falls

1

1

Herndon

4

11

Leesburg

6

6

Manassas

2

3

Marshall

1

1

Oakton

2

2

Reston

7

12

Sterling

4

9

Vienna

2

3

Woodbridge

1

1

92

198

# of Individuals

# of Complaints

Total:

IAD 2015 Complaints Top 5 Individuals vs. All Other Individuals Individual 1 Individual 2

2.% 1 VA (Aldie) Resident Individual 2 = 25 Complaints

Individuals 3 & 4* Individual 5

2.1% 1 VA (Chantilly) Residence* 2 Individuals: Individual 3 = 15 Complaints Individual 4 = 11 Complaints

All Other VA Individuals All Other MD Individuals * Same Residence

.6% 1 VA (Centreville) Resident Individual 5 = 7 Complaints

11.5%

MD City Barnesville

1

1

Poolesville

1

1024

2

1025

IAD

# of Individuals

# of Complaints

Grand Total

94

1223

Total:

2015

11.4% All Other VA Individuals 140 Complaints

.1% All Other MD Individuals 1 Complaint

83.7% 1 MD (Poolesville) Resident Individual 1 = 1024 Complaints

mwaa.com

49

Dulles International (IAD) Noise Complaint Statistics - Continued Figure 48: IAD 2015 Complaint Statistics

Complaints per Individual

# of Individuals

# of Complaints

% of All Individuals

% of All Complaints

1

66

66

70.2%

5.4%

2

7

14

7.4%

1.1%

3

7

21

7.4%

1.7%

4

6

24

6.4%

2.0%

5

2

10

2.1%

0.8%

6

1

6

1.1%

0.5%

7

1

7

1.1%

0.6%

11

1

11

1.1%

0.9%

15

1

15

1.1%

1.2%

25

1

25

1.1%

2.0%

1024

1

1024

1.1%

83.7%

2015

mwaa.com

50