Centennial Airport Part 150 Cover P16-307740

Part 150 Noise Exposure Map Update Report

Centennial Airport Arapahoe County Public Airport Authority

December 2016

Noise Exposure Map Update

Centennial Airport

In Compliance with 14 CFR Part 150

HMMH 307740 December 2016

Prepared for:

Arapahoe County Public Airport Authority 7800 S. Peoria Street, Unit G1 Englewood, CO 80112

Noise Exposure Map Update

Centennial Airport

In Compliance with 14 CFR Part 150

HMMH 307740 December 2016

Prepared for: Arapahoe County Public Airport Authority 7800 S. Peoria Street, Unit G1 Englewood, CO 80112

Prepared by:

Rhea Gundry Gene Reindel Scott McIntosh Michael Hamilton

HMMH 1508 Eureka Road, Suite 190 Roseville, CA 95661

Sponsor’s Certification

The Arapahoe County Public Airport Authority has completed a comprehensive update of the Title 14 Code of Federal Regulations (CFR) Part 150 Noise Exposure Map for Centennial Airport. 1) The Noise Exposure Maps and associated documentation submitted by the Arapahoe County Public Airport Authority to the Federal Aviation Administration under Code of Federal Regulations Part 150, Subpart B, Section 150.21, are true and complete under penalty of 18 U.S.C.1001.

2) Pursuant to Part 150, Subpart B, Section 150.21(b), all interested parties have been afforded adequate opportunity to submit their views, data, and comments concerning the correctness and adequacy of the draft noise exposure map and of the descriptions of forecast aircraft operations. 3) The “Existing Conditions (2016) Noise Exposure Map” (Figure 13 on page 55) accurately represents conditions for calendar year 2016. 4) The “Forecast Conditions (2021) Noise Exposure Map” (Figure 14 on page 57) accurately represents forecast conditions for calendar year 2021.

By: ______

Title: ______

Date: ______

Airport Name: Centennial Airport Airport Owner/Operator: Arapahoe County Public Airport Authority

Address: 7800 S. Peoria Street, Unit G1, Englewood, CO 80112

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Sponsor’s Certification

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Executive Summary

Arapahoe County Public Airport Authority (ACPAA or Centennial Airport) began participating in the voluntary Federal program to proactively plan land use compatibility with aircraft noise from Centennial Airport in 2003, which resulted in completing their first airport noise compatibility planning study in 2008 per Title 14 of the Code of Federal Regulations Part 150 (Part 150). This document presents the update to the Centennial Airport Noise Exposure Map (NEM), which is one of two principal elements associated with land use compatibility planning study under Part 150. The second element is the Noise Compatibility Program (NCP), which includes the measures to reduce or eliminate incompatible land uses subject to aircraft noise. Centennial Airport is updating the NEM at this time and will use the results to determine whether an update to the NCP is warranted.

The primary products associated with a NEM are the aircraft noise exposure contours presented in 5-decibel (dB) increments from 65 to 75 dB in terms of Day-Night Average Sound Level (DNL), and overlaid on a land use base map depicting the areas near the airport experiencing aircraft noise levels incompatible with residential and other noise sensitive land uses, such as schools and places of worship. Descriptions of the noise metrics relevant to this document are provided in Appendix A. A NEM is an extensive document complying with FAA Part 150 regulations that includes the airport layout, aircraft operations at the airport (e.g., arrivals and departures), and an aviation forecast projecting aircraft operations five years into the future in addition to the aircraft noise exposure contours representing existing and forecast conditions on two separate figures overlaid on a base map showing the land use.

An NEM update provides an opportunity to reach out to: 1. The interested public to present the results of the project 2. Airport users to determine how they use the airport and to convey to them the importance of aircraft noise and “flying friendly” 3. Local jurisdictions responsible for land use planning to obtain the most current land use data in the vicinity of the airport and stress the importance of appropriate land use planning within the airport environs

Centennial Airport exceeded the requirements of Part 150 in terms of reaching out to the public. Part 150 only requires Centennial Airport to provide a 30-day review period for the public to comment on the draft NEM document. Centennial Airport included two public workshops in addition to the public review period to: (1) inform the public of the project at the outset and (2) present the results of the project. In addition, Centennial Airport published project newsletters before and after each workshop providing project updates to the stakeholders and interested public. The complete stakeholder engagement process is described in Section 5 of this document.

Figure ES-1 presents the aircraft noise exposure contours overlaid on the land use base map carefully and accurately prepared during this study for the existing conditions – year 2016. Figure ES-2 presents the same information representing forecast conditions, specifically forecast aircraft operations for the year 2021. Table ES-1 and Table ES-2 present the resulting land use compatibility assessment for the existing and forecast conditions. The NEMs for which Centennial Airport is seeking FAA acceptance as their “official” and accepted maps are provided in Section 4 as Figure 13 (existing - 2016) and Figure 14 (forecast - 2021).

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Executive Summary

Table ES-1 Compatibility Analysis Results by Parcel Within 2016 (Existing Conditions) Noise Contours Source: HMMH Noise Compatibility by Parcel Incompatible Noise Level, DNL Total Parcels Compatible Parcels Parcels 65-70 dB 110 109 1 70-75 dB 50 50 0 75+ dB 10 10 0

Table ES-2 Compatibility Analysis Results by Parcel Within 2021 (Future Conditions) Noise Contours Source: HMMH Noise Compatibility by Parcel Incompatible Noise Level, DNL Total Parcels Compatible Parcels Parcels 65-70 dB 141 140 1 70-75 dB 55 55 0 75+ dB 9 9 0

Aircraft operations on the parallel runways (Runways 17L-35R and 17R-35L) result in the 2016 Existing NEM DNL 65 dB contour extending to the north approximately one block beyond East Arapahoe Rd., to the south about one block short of Lincoln Avenue less than ½ mile to the west of the Airport property and less than ¼ mile to the east of airport property on the south end. Aircraft operations on the crosswind runway (Runway 10-28) result in the 2016 existing NEM DNL 65 dB contour extending just beyond the Airport property to the east. The 2021 Forecast NEM DNL 65 dB contour is approximately the same size and shape as the Existing contour, extending slightly farther north of East Arapahoe Rd. and slightly east of Airport property near the end of Runway 28. There is a single potential incompatible parcel, a Holiday Inn north of the Airport located at 6638 S Nome Ct, Centennial, CO 80111, which was built in 2016 and will begin to accept reservations for arrivals on or after January 16, 2017. This land use, based on 14 CFR Part 150, Appendix A, Table 1 (and reproduced as Table 2 of this document) indicates that this land use is incompatible transient lodging, as the parcel is clipped by the Existing (2016) and Future Condition (2021) DNL 65 dB contour. It should be noted that the DNL 65 dB contour for both years do not contain the building itself, but fall on the parking lot. While the parcel is considered incompatible with its current use of transient lodging, the structure does not qualify for noise mitigation, particularly sound insulation treatments or positive ventilation, due to having been built after October 1, 19981 and after ACPAA published aircraft noise exposure contours for Centennial Airport that showed the parcel is incompatible with aircraft noise2. There is a planned development of a 252 multi-family unit residential complex to the southwest of the Airport which has been approved by Douglas County, however, final approval of the site plans and expected completion date are unknown at this time. This future site would fall within the Existing (2016) and Future Condition (2021) DNL 65 dB contour. Once built, this land use would be incompatible based on Part 150 land use guidelines. Should this development proceed, despite recommendations against from Centennial Airport staff, they would not qualify for noise mitigation, particularly sound insulation treatments or positive ventilation, as the FAA does not allow

1 FAA Final Policy on Part 150 Approval of Noise Mitigation Measures: Effective on the use of Federal Grants for Noise Mitigation Projects, dated April 3, 1998 2 Airport Improvement Program Handbook, FAA Order 5100.38D, Appendix R. Noise Compatibility Planning/Projects, Table R-6 Noise Compatibility Planning/Project Requirements.

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Executive Summary

airport revenue or Federal funds to be used to mitigate incompatible structures built after October 1, 19983 and after ACPAA published aircraft noise exposure contours for Centennial Airport that showed the parcel is incompatible with aircraft noise4.

In support of Arapahoe County planning policies, the Arapahoe County Public Airport Authority has generated supplemental noise contours consisting of 55 dB DNL and 60 dB DNL contours. These supplemental contours are not required under 14 CFR Part 150. They are for informational purposes only and have not been approved by the Federal Aviation Administration.

3 FAA Final Policy on Part 150 Approval of Noise Mitigation Measures: Effective on the use of Federal Grants for Noise Mitigation Projects, dated April 3, 1998 4 Airport Improvement Program Handbook, FAA Order 5100.38D, Appendix R. Noise Compatibility Planning/Projects, Table R-6 Noise Compatibility Planning/Project Requirements.

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Executive Summary

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Contents

1 INTRODUCTION ...... 1 1.1 Purpose of this Noise Exposure Map Update ...... 1 1.2 Federal Regulation Guiding Airport Noise Compatibility Planning ...... 2 Part 150 Noise Exposure Map ...... 3 Part 150 Noise Compatibility Program...... 4 1.3 Project Location and Setting ...... 4 1.4 Brief History of Noise Compatibility Planning at Centennial Airport ...... 4 1.5 Project Roles and Responsibilities ...... 5 Arapahoe County Public Airport Authority ...... 5 Federal Aviation Administration ...... 5 Consulting Team ...... 5 1.6 Noise Exposure Map Checklist ...... 6 2 INVENTORY OF EXISTING LAND USE ...... 13 2.1 Jurisdiction and Zoning in the Airport Environs...... 13 Future Land Use and Zoning ...... 14 2.2 Compatible Land Use Guidelines ...... 15 3 DEVELOPMENT OF NOISE EXPOSURE MAP ...... 21 3.1 Noise Modeling Inputs ...... 21 Airport physical parameters ...... 21 Aircraft operations ...... 24 Aircraft noise and performance characteristics ...... 25 Annual-average day aircraft operations ...... 25 Runway utilization ...... 30 Flight track geometry and utilization ...... 34 Meteorological conditions ...... 51 Terrain ...... 51 4 NOISE EXPOSURE MAP AND LAND USE COMPATIBILITY ...... 53 4.1 Noise Exposure Map Figures ...... 53 4.2 Compatible Land Use Analysis ...... 59 Non-residential noise-sensitive land uses within the noise contours ...... 59 Residential land uses and population within the noise contours ...... 59 Comparison of Measured and Modeled Noise Exposure ...... 62 5 STAKEHOLDER ENGAGEMENT ...... 63 5.1 Public notification ...... 63 5.2 Public Open House 1 ...... 64 Information disseminated ...... 64 Public comment process ...... 64 5.3 Public Open House 2 ...... 65 Information disseminated ...... 65 Public Review and Comment Period ...... 65 5.4 Public Input Received during the Public Comment Period ...... 65 Introduction to Noise Evaluation ...... A-1 A.1 Introduction to Noise Terminology ...... A-1

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Contents

A.1.1 Decibel, dB ...... A-1 A.1.2 A-weighted Decibel ...... A-2 A.1.3 Maximum sound level, Lmax ...... A-4 A.1.4 Sound exposure level, SEL ...... A-4 A.1.5 Equivalent sound level, Leq ...... A-5 A.1.6 Day-night average sound level, DNL ...... A-6 A.2 Effects of Weather on Outdoor Sound Propagation ...... A-8 A.3 Effects of Aircraft Noise on People ...... A-9 A.3.1 Speech interference ...... A-10 A.3.2 Sleep interference ...... A-11 A.4 Community Annoyance ...... A-12 A.5 Land Use Compatibility ...... A-14 Existing Noise Compatibility Program ...... B-1 B.1 Program Elements Summary of Original 2008 NCP – Noise Abatement Measures...... B-1 B.2 Program Elements Summary of Original 2008 NCP – Land Planning Measures ...... B-3 B.3 Program Elements Summary of Original 2008 NCP – Land Planning Measures ...... B-4 FAA Record of Approval for 2008 Noise Compatibility Program ...... C-1 FAA Notification of Compliance for 2008 Noise Exposure Maps in Federal RegisterD-1 Forecast of Aircraft Operations at Centennial Airport ...... E-1 FAA Approval of Aircraft Operations Forecasts ...... F-1 Public Consultation ...... G-1 G.1 Roundtable Meeting – November 4, 2015 ...... G-2 G.2 Public Workshop February 3, 2016 ...... G-21 G.2.1 Announcement/press release ...... G-21 G.2.2 Centennial Airport E-Newsletter – January 2016 ...... G-27 G.2.3 Social Media Posts ...... G-29 G.2.4 Public workshop sign-in sheets – February 3, 2016 ...... G-35 G.2.5 Public workshop handouts – February 3, 2016 ...... G-39 G.2.6 Open House Boards – February 3, 2016 ...... G-41 G.2.7 Comments received at or immediately following February 2016 public workshop ...... G-59 G.2.8 Centennial Airport E-Newsletter – February 2016 ...... G-59 G.2.9 News Articles...... G-61 G.3 Public Workshop November 2, 2016...... G-66 G.3.1 Announcements/press release ...... G-66 G.3.2 Denver Post Article – November 29, 2016 ...... G-74 G.3.3 Centennial Airport E-Newsletter – October 2016...... G-78 G.3.5 Public Meeting Notices ...... G-80 G.3.6 Elected Official Invite Letter - Example ...... G-82 G.3.7 Greenwood Village Newsletter – November 2016 ...... G-87 G.3.4 Social Media Posts ...... G-88 G.3.5 Public workshop sign-in sheets – November 2, 2016 ...... G-92 G.3.6 Open House Boards – November 2, 2016 ...... G-98 G.3.7 Fox News Broadcast – November 2, 2016...... G-113 G.3.8 Comments received at or immediately following November 2016 public workshop...... G-113 G.3.9 Centennial Airport E-Newsletter – December 2016 ...... G-128 Non-Standard Aircraft Types Request Letter ...... H-1 FAA Approval of Non-Standard Aircraft Types ...... I-1

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Contents

Request for Approval of Use of INM v 7.0d and RealContours™ ...... J-1 FAA Approval of Use of INM v 7.0d and RealContours™ ...... K-1 Supplemental Contours ...... L-1

Figures

Figure ES-1 Baseline (2016) DNL Noise Contour ...... ix Figure ES-2 Forecast (2021) DNL Noise Contour ...... xi Figure 1. Existing Land Use ...... 19 Figure 2. Existing Centennial Airport (APA) Layout ...... 23 Figure 3. Overall Runway Use Percentages (2016 and 2021) – Day ...... 32 Figure 4. Overall Runway Use Percentages (2016 and 2021) – Night ...... 33 Figure 5. Representative Sample of Modeled Arrival Flight Tracks (2016 & 2021) ...... 35 Figure 6. Representative Sample of Modeled Departure Flight Tracks (2016 & 2021) ...... 37 Figure 7. Radar Track Density Plot - All Circuits...... 39 Figure 8. Radar Track Density Plot - Jet Arrivals ...... 41 Figure 9. Radar Track Density Plot - Jet Departures ...... 43 Figure 10. Radar Track Density Plot - Non-Jet Arrivals ...... 45 Figure 11. Radar Track Density Plot - Non-Jet Departures ...... 47 Figure 12. Radar Track Density Plot - All Helicopters ...... 49 Figure 13. Existing Conditions (2016) Noise Exposure Map ...... 55 Figure 14. Forecast Conditions (2021) Noise Exposure Map ...... 57 Figure A-1. A-Weighting Frequency Response ...... A-3 Figure A-2. Representative Sound Levels ...... A-3 Figure A-3. Variation in the Sound Level over Time ...... A-4 Figure A-4. Graphical Depiction of Sound Exposure Level ...... A-5 Figure A-5. Example of a One-Minute Equivalent Sound Level ...... A-5 Figure A-6. Example of a One-Minute Equivalent Sound Level ...... A-6 Figure A-7. Example of a One-Minute Equivalent Sound Level ...... A-7 Figure A-8. Outdoor Speech Intelligibility ...... A-11 Figure A-9. Recommended Sleep Disturbance Dose-Response Relationship ...... A-12 Figure A-10. Percentage of People Highly Annoyed ...... A-13 Figure A-11. Community Reaction as a Function of Normalized Outdoor DNL ...... A-14 Figure L-1. 2016 55-60 DNL contour ...... L-3 Figure L-2. 2021 55-60 DNL contour ...... L-5

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Contents

Tables

Table ES-1 Compatibility Analysis Results by Parcel Within 2016 (Existing Conditions) Noise Contours ...... vi Table ES-2 Compatibility Analysis Results by Parcel Within 2021 (Future Conditions) Noise Contours ...... vi Table 1. Part 150 Noise Exposure Map Checklist ...... 7 Table 2 Part 150 Noise/Land Use Compatibility Guidelines ...... 16 Table 3. Runway Details ...... 22 Table 4. Forecast of Aircraft Operations - 2016 to 2021...... 25 Table 5. 2016 Operations Summary ...... 26 Table 6. Modeled Average Daily Aircraft Operations for 2016 ...... 26 Table 7. 2021 Operations Summary ...... 28 Table 8. Modeled Average Daily Aircraft Operations for 2021 ...... 28 Table 9. Overall Runway Use Percentages ...... 30 Table 10. Modeled Average Daily Runway Use by Aircraft Category ...... 31 Table 11. Comparison of Land Area Enclosed by the 2016 and 2021 DNL Contours ...... 54 Table 12. Estimated Private Residential Population Within 2016 and 2021 DNL Contours ...... 60 Table 13. Compatibility Analysis Results by Parcel Within 2016 (Existing Conditions) Noise Contours ...... 60 Table 14. Compatibility Analysis Results by Parcel Within 2021 (Future Conditions) Noise Contours ...... 60 Table 15. Contour Areas On and Off Airport Property (2016) ...... 60 Table 16. Contour Areas On and Off Airport Property (2021) ...... 61 Table 17. Comparison of Measured and 2016 Modeled Annual DNL at Noise Monitor Locations ...... 62 Table A-1. 14 CFR Part 150 Noise / Land Use Compatibility Guidelines ...... A-16

Centennial Airport xvi

Introduction

1 INTRODUCTION

This document provides an update of the Centennial Airport (APA or KAPA5) Noise Exposure Map (NEM) to reflect aircraft noise exposure from current conditions and forecast aircraft operational activity. The NEM identifies noise exposure from Centennial Airport aircraft operations and assesses the compatibility of nearby land uses. The primary product of a NEM update is a set of maps that display the aircraft noise exposure in terms of Day-Night Average Sound Level (DNL) contours intended to assess the noise and land use compatibility for existing and forecast aircraft activity. Noise exposure is presented on the maps in contours of equal noise exposure much like terrain maps use contours to show equal ground elevation. These maps are used to define the areas in which Federal funds can be used to implement Noise Compatibility Program (NCP) measures such as noise abatement procedures, land acquisition and sound insulation of noise-sensitive structures within the high noise level areas.

Federal Aviation Administration (FAA) regulations recommend airports mitigate incompatible aircraft noise in areas from highest to lowest noise levels and Federal and Airport funds may only be used to abate and mitigate aircraft noise within the DNL 65 dB contour (DNL 65 dB and higher noise exposure levels). For eligibility of Federal funds to provide sound insulation, the noise sensitive rooms, on average, within the structure must have an interior DNL of 45 dB or higher. To ensure Federal funds are appropriately used for NCP implementation, current FAA guidelines require airports to maintain their NEM to reasonably represent current conditions. Specifically, if changes have occurred resulting in an expected DNL increase or decrease of 1.5 dB or greater over compatible or incompatible land use (Part 150, Section 150.21(d)), respectively, the NEM must be updated. If the NEM is more than five years old, the airport must confirm in writing that the maps continue to be a reasonable representation of the conditions at the airport or update the NEM. NEMs over 10 years old cannot be used to secure Federal grants for noise purposes. Since the 2008 Centennial Airport NEM, which the FAA accepted as meeting Part 150 regulations, is greater than five years old and no longer represents current airport conditions, the Arapahoe County Public Airport Authority (ACPAA or Centennial Airport), as owner and operator of Centennial Airport, is updating the NEM. The remainder of this chapter provides the purpose for the NEM update, a summary of the Federal regulation supporting airport noise compatibility planning, a brief history of noise compatibility planning at Centennial Airport, an overview on implementation of the Part 150 regulation at Centennial Airport, Part 150 roles and responsibilities of the participating groups, and a completed copy of the NEM checklist.

1.1 Purpose of this Noise Exposure Map Update Given it has been more than five years since the Centennial Airport NEM was updated and Centennial Airport has acquired a noise monitoring system that collects aircraft operations and noise data since the approval of the NEM,

5 The International Air Transport Association's (IATA) Location Identifier is a unique 3-letter code (also commonly known as IATA code) used in aviation and also in logistics to identify an airport. The IATA 3-letter code for Centennial Airport is APA. The International Civil Aviation Organization (ICAO) uses a four-character alphanumeric code designating aerodromes around the world. The ICAO code for Centennial Airport is KAPA.

Centennial Airport 1