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Res 00-312 RESOLUTION NO. 00-312 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF FEDERAL WAY, WASHINGTON, REQUESTING PORT OF SEATTLE AND FEDERAL AVIATION ADMINISTRATION ACTION ON MODIFICATIONS TO EXISTING SOUTHBOUND DEPARTURE FLIGHT TRACKS FROM SEATTLE- TACOMA INTERNATIONAL AIRPORT. WHEREAS, the Port of Seattle is conducting a noise evaluation under Federal Aviation Administration ("FAA") regulations, to evaluate aircraft noise and possible measures to alleviate it; and WHEREAS, this evaluation, known as a Part ISO evaluation, has resulted in a series of preliminary recommendations, including recommendations pertaining to sound attenuation for multiple family and mobile homes, modifications to aircraft approach transition zones, and changes to aircraft departure flight tracks; and WHEREAS, there are several alternative preliminary recommendations concerning modifications of departure flight tracks ftom Seattle-Tacoma International Airport ("SeaTac"), including a "two track" and a "three track" alternative; and WHEREAS, the City of Federal Way believes that communities should not be protected ftom aircraft noise at the expense of other communities, upon whom the noise is concentrated; and WHEREAS, some of the preliminary recommendationsftomPart 150 Study appear to demonstrate that modif'ying the existing southbound flight tracks can substantially decrease noise ftom Res. fbo-31ZPage I (F IF\\ fô) '0/1" ::::> ,Q; LJ U existing flight patterns over the City of Federal Way, without resulting in substantial noise inaœses in other communities; and WHEREAS, the Federal Way City Council wishes to express its preference for such alternative flight track modifications that accomplish this purpose; NOW THEREFORE, THE CITY COUNCIL OF THE CITY OF FEDERAL WAY HEREBY RESOL YES AS FOLLOWS: Section 1. City of Federal Way Flight Track Modification Preferences. The City of Federal Way prefers that flight tracks departing SeaTac Airport in a southbound direction be modified as shown on Exhibit A hereto and as described below as follows: A The"Elma" departure should be modified to direct planes to turn west at 2 DME fi"om the Seattle VOR, and then fly over Puget Sound north of the City of Federal Way, rather than turning at 5 DME and flying due west along S. 320th Street directly ovec the City of Federal Way. B. The "Mountain" departure should be modified to direct planes to follow an angled departure over the Kent Valley, before turning east bound, rather than turning at 5 DME east along S. 320th Street. C. A new, late night track for 747s flying to Asia should be created. This new track should be routed south and west following the 1-5 corridor, then turning west and/or north only over the Port of Tacoma, rather than flying along S. 320th Street directly over the western half of the City of Federal Way. D. Modified departure flight tracks and procedures should be charted and documented to ensure that noise abatement flight tracks are properly implemented in such a way as to reduce the possibility of stray aircraft and/or human error. Res. #OO-31;!Page 2 Section 2. Reauested Port of Seattle and Federal Aviation Administration Action. The City of Federal Way requests that the Port of Seattle work diligently with the FAA to secure the FAA's agreement to implement the flight track changes outlined in Section I. The City of Federal Way also directly requests that the FAA agree to implement such changes. Section 3. Severability. If any section, sentence, clause or phrase of this resolution should be held to be invalid or unconstitutional by a court of competent jurisdiction, such invalidity or unconstitutionality shall not affect the validity or constitutionality of any other section, sentence, clause or phrase of this resolution. Section 4. Ratification. Any act consistent with the authority and prior to the effective date of the resolution is hereby ratified and affirmed. Section 5. Effective Date. This resolution shall be effective immediately upon passage by the Federal Way City Council. RESOLVED BY THE CITY COUNCIL OF THE CITY OF FEDERAL WAY, WASHINGTON, this 18th day of April, 2000. CITY OF FEDERAL WAY ~z~~ /;24 /"" MAYOR,MIKEPAfK / ~~~ APPROVED AS TO FORM: Res. #OO-31~Page 3 ~. --:=::------- - , LONDI K. LINDELL FILED WITH THE CITY CLERK: 04/18/00 PASSED BY THE CITY COUNCIL: 04/18/00 RESOLUTION NO. 00-312 k:1reso1pt150 'r. Res. # 00-31i'age 4 CITY OF FEDERAL WAY PROPOSED SEATAC SOUTH FLOW FLIGHT TRACKS Legend: c:==:J Federal Way City Limits Ittf Flight Tracks c:==:J Federal Way PAA ."". Asia Night-time Flight Track EXHIBIT "A /( Á ~ERRL lu,","oamiml..Is!!9..mll � MEETING DATE: April 1 ii, 2000 ITEM# CTTY OF FEDERAL WAY !I� �� .�� ") City Council AGENDA ITEM SUBJECT: Seattle-Tacoma ("Sea-Tac") International Airport Part 150 Noise Study; Part 150 Study Committee Recommendations on Flight Track Modifications CATEGORY: X CONSENT _ORDINANCE _BUSINESS HEARING — �'I'I �RESOLUTION _STAFF REPORT _PROCLAMATION STUDY SESSION OTHER BUDGET IlViPACT: Amount Budgeted: $ 0 Eapenditure Amt: $ 0 Contingency Reqd: $ 0 ATTACHMENTS: March 21, 2000 City Council study session briefing memorandum dated March 10, 2000: draft resolution. SUMMARYBACKGROUND: Preliminary recommendations on Sea-Tac southbound aircraft flight departure route modifications are emerging from the current Part 150 Noise Study. Preliminary recommendations appear to demonstrate that modifying the existing southbound flight tracks can substantially decrease noise from existing southbound departure flight patterns over the City of Federal Way, without resulting in substantial noise increases in other communities. Potential City Council actions include: 1) take no action; 2) support the proposed study recommendations; 3) oppose the study recommendations; 4) present alternative flight track modifications (staff recommendation). Attached is a draft resolution supporting modifications to existing southbound depaiture flight tracks and recommending minor adjustments to the proposed "three track" alternative. CITY COUNCIL COMMITTEE RECOMII�NDATION: The City Council met in study session on March 21, 2000 and placed this issue on the April 18, 2000 City Council agenda. CITY MANAGER RECOMMENDATION: Motion to approve the attached resolution supporting changes to the existing south flow Sea-Tac flight departure tracks. APPROVED FOR INCLUSION IN COUNCIL PACKET: (BE T O B E CO BY CTIY CLERKSf OFFICE) COUNCIL ACTION: _APPROVED _DEIVIED TABLED/DEFERRED/NO ACTION COUNCIL BILL # lst Reading Enactment Reading ORDINANCE # RESOLUTION # 1 � .I ou-'�� u L � DEPARTMENT OF COMI�TY DEVELOPMENT SERVICES March 10, 2000 TO: Mayor Park and City Council Members FR: Greg Fev�� Principal Planner VIA: David Moseley, City Manager RE: March 21, 2000 City Council Study Session: Seattle-Tacoma International Airport Part 1 SO Noise Study; Part ISO Committee Recommendations on Flight TrackModifications PURPOSE OF BRIEFING Brief City Council members on emerging Part 150 Noise Study Advisory Committee recommendations for flight track modifications. 2. Present recommendations for City Council consideration on the proposed flight track modifications. BACKGROUND A Part 150 Noise Study ("study") evaluates aircraft noise and land use measures intended to alleviate noise impacts in surrounding communities. The study is guided by Federal Aviation Administration ("FAA") regulations. Completing the study provides Seattle-Tacoma International Airport ("SeaTac") with eligibility for federal funds to complete noise mitigation projects. The study deals only with the current two-runway airport and does not consider noise impacts from a third runway. The third runway will be addressed in subsequent studies. A variety of recommendations are beginning to emerge from the study related to: sound attenuation for multiple family and mobile homes; changing the noise remedy boundary; modifications to approach transition zones; and, modifications to flight tracks. This briefing will focus specifically on recommendations emerging on flight tracks modifications as they relate to Federal Way. Flight track alternatives have been developed by means of an interactive process involving community and technical participants serving on a Part 150 Study Advisory Committee, FAA, Port of Seattle ("POS") and its consultants. Lloyd Docter has been appointed as Federal Way's citizen representative to the Citizen's Advisory Committee and Greg Fewins serves on the Technical Advisory Committee. Together, these Committee's constitute the Study Advisory Committee referenced in this memorandum. • . Prior to 1990, aircraft from SeaTac departed to the south in a dispersed or scatter pattern (refer to exhibit A). Following the FAA's implementation of the "four post pattern" in 1990, departing aircraft are now directed into more confined flight tracks (refer to exhibit B). This resulted in concentrations of departing aircraft over Federal Way's most densely populated residential areas (e.g. 320�` Street corridor). The city has been working with FAA and POS staff for a number of years to evaluate potential modifications to the four-post pattern to reduce impacts on Federal Way area residents. The issue was eventually deferred to the Part 150 study. FAA is ultimately responsible to implement any changes to flight tracks. KEY TERMS This memorandum refers to a variety of terminology and a series of attached map and graphic exhibits. These exhibits reflect complex modeling results and without explanation may be difficult to decipher. At the March 21 study session, staff will walk through an explanation of each e�ibit. There are a number of inethods to evaluate and graphically depict aircraft noise impacts. The following methodologies are depicted on the enclosed exhibits as referenced in the section titled `Study Advisory Committee Recommendations'. A brief definition of each methodology is provided to assist you in understanding the resulting impacts of the Advisory Committee recommendations. Day/Night Level ("DNL'): Represents the 24-hour annual average noise level. Single Event Sourrd Exposure Level ("SEL'): Describes the noise produced by one flight. This data is used to predict areas encountering sleep interference. Time Above ("TA'): Expresses the number of minutes above a certain noise level an area experiences. This data is used as an indicator of areas of speech interference. For each of these methodologies, noise impacts are depicted at various decibel levels resulting in a noise contour map. As a point of reference, 80 decibels is equivalent to noise from a hair dryer, 70 decibels is equivalent to freeway traffic and 60 decibels is equivalent to conversation levels. STUDY ADVISORY CONIlVIITTEE RECOMII�NDATIONS There are two principal Study Advisory Committee recommendations on modifications to south flow flight tracks. The alternative recommendations are described as two-track and thre�track proposals. The two-track proposal separates a portion of south and eastbound flights from the Pacific H'ighway corridor and directs them over the Kent/Auburn Valley. The three-track proposal includes the two- track recommendation and separates a portion of south, west and northbound flights from the Pacific Highway corridor and directs them over Des Moines and Puget Sound (refer to exhibit C). For comparison purposes, the attached exhibits D, F and H depict the two-track proposal showing DNL, SEL and TA, and exhibits E, G and I depict the same for the three-track proposal. Focusing . • only on impacts to the city and the city's potential annexation areas, using the DNL methodology, noise impacts above 65 DNL are eliminated within the city and potential annexation area for both the two and three-track proposals. Using the 85 SEL contour, two-track impacts are slightly increased within the city and the city's potential annexation area. The three-track alternative significantly expands the 85 SEL contour north of the city over Puget Sound. Using the 10 minute TA 65 contour, impacts within the city are significantly reduced, however impacts to the city's potential annexation area are slightly increased. The three-track alternative increases 10 minute TA 65 contour impacts over Puget Sound. STAFF RECOMMENDATION Following review of the Part 150 Study Advisory Committee recommendations by POS sta� a public hearing will be scheduled on the study in late spring or early summer. The city has an opportunity beginning now through the public hearing to provide the POS with comments and direction on the proposed flight track modifications. The following outiines potential recommendations on the proposed modifications: 1. Take no action; 2. Support the proposed Part 150 Study recommendations; 3. Oppose the proposed Part 150 Study recommendations; 4. Present city recommendations on alternative flight track modifications (staff recommendation). Attached is a draft resolution for City Council consideration. The resolution supports the need for modifications to flight tracks but identifies preferable flight track alignments (recommendation 4 above). These alternative flight track alignments would further reduce impacts to the city and PAA, while minimizing impacts to adjacent jurisdictions. An explanation ofthe details ofthis resolutionwill be provided at the City Council study session. :11 A March 22, 1989 South Flow Flight Track Plot B 7une 30, 1993 South Flow Flight Track Plot C Summary of Flight Track Alternatives D Two-Track Annua165 DNL Contour E Three-Track Annual 65 DNL Contour F Two-Track 85 SEL Contour G Three-Track 85 SEL Contour H Two-Track 10 Nlinute TA 65 Contour I Three-Track 10 Minute TA 65 Contour 7 Draft Resolution dl6:peR150meaa.wp ��`��f � `1l,J � �; /'� ► �r�/, � +►`. � . . � : :� ::.. �.��t�w. lt19� �:•..•�I\.� '_ ��. �R��j�." ,- �� /��l��f ��^� � �.�� •��i7�+.•• .9•J'y�il. 1� t�. ��=��w l�■ '�• ��♦ C ti � � �. ,i.«.:r��r 7 �_.�i��•ye:.••.11�.:.��4►��Z"!��►]� _ �L �{ �A!' �i'�,` '�1 � �L% �j� (°�:'1��y��1� i� � ��r�t�I��l�,, �?,* ►�.�. � . �.` �� A�� • •.. _. a' • . . t . ► � 1 { I� �� + � i.�� .' .�-�� t � . �► . . � � , t � l . : �� . �i �'' Y,'�I � ��\�� F�� ll/� •j� 4 • � ��;�� ... ► � � '� ��` :•r ,. �T� � . , �� ;,. �� : •�'�1 � „� :. 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R `� ' ��_ • � , `'� =�^"�v.��'' "�-�� _+�� ►, ��:��rr\��.`��o\`y\�?��-\�� ! �__-`=_ _ -- -�--- _ = _=: � � � = - r—_"_= �� = =::••''_�' - - _-_ ;. �__. __.,.._ _�_: :;� .: �� — -- �—��i.�.�: �'_ :�-�.�:": . ~'-` ;`� ` 1! � _� � � � � � � � � � . i.�.r r— � V � � �. Ex(sting South Flow Tracks Summary of Fiight Track Alternatives SOUTH FLOW JET TRACKS South Flow Two Tracks 111.20.A Revlsed 11/29/99 South Flow Three Tracks 111.20. B � L� �� • • . . �... ... � - —,.�..�......— North 6000 0 6000 12000 Feet . . 111.20 A-2 C Ootr�a�ison of E�dsting Conditia�s Mnual 65 DNL and Tin� Tradc Dispetsion South Flaw Annual 65 DNL S@attI e- Area No Longer Aifeded by Two Tradc Dispersion Soulh Flow AMwal 65 DNL Taco ma AdC'ido�ai Area Aifected by Two Tradc Oispersion Soulh Flow Mnua165 ONL FAR PaR 150 SludY Update E�ting Ca�d'rtions Annua165 ONL The Bamard Dunkeiberg & Company Team � -. � I r �' I I '��, � , � � � , , � I �� . , ,r,,,�,,.,,. �.r,.,.. ' � � � � � I - � �„ ��. � � i111i/M�ii1f1�IH/1�/1i� M • �MHM�IHHHHHHifMIN1 NfNfMNfHMH11MH�if1M A V NH1FiN{INiNMHH11�111 MI MHHHNHHH�MHHMH �M/ �NMM�NMIMNNN�IIY MM1 iNNHHHNNHNNIN� HNf • HHMI/NFFNMIHNf�iAHM M�MNM�M�MIMMNV NIM/ H�N�H/HNMi�NIN1HHiH � 1�NINHHHNHiHff 11HfM YMiNIN1�MHN1�I� IHi1N �111NiNN11M/HI/ INIi1M � MM/HHifH/HH1AHfifM H1H1H�i�HMH� N1H1N • iMMM�HMMW IHIMF` H�NMNHN11+1HH/N 1MNM�MNMi iNiNM 4i1N1i1MiM rHiHiV 1HMfffHH IHi11H iHWHN1V I�MN+ MIMHHYN�►'�✓� � M�MMYlfrenr+� q1qIN Ii1MIMN �iH111�i1N/NiN 1HW IMHMWfI MH/ IIMIINNH NIF HINrfNiN Ni�11MMi�4W Nf 9HII�i/1N H MNNNN N MIMM�Y 1� w� 1 � O �� 6000 • � ��r`� �� 12000 Feet 111.20 B-2 C Corr�arison o# F�dst�i�g C�a�ditions Annual 65 DNL. and Three Tradc Disp�slon South Flow Annua165 DI� � Area No t_aiger Affected by Tfuee Tradc Dispersion Sotrth f'iow AtKwal 65 ONL Add'�io�ai Area Affeded by Three Tradc Dispersion SaAh Flow Arn�aiA 65 DNL Existing Conditiot►s Mnuai 65 DNL Seattle- Tacoma FAR Part 150 Study Update .��w» '(Yd �� g 5 S'C I': �ti ,..,;.� 1 � ��r 1 h•, f ��, �! Y d ......_. ... � � � �"' � m � _ � � Q .r � � �(� NI� O O � � 0� � � U � � �� N C� � �� ■. � � �� H � � p F 3�� r � y�^ H H � G �T p .O O � � � � � � � � � s^ � � i � � � �• � � �a U � � N The Bamard Dunkelberg 8� Company Team IO r,�� ' R ��,�� .��. �"1��. The Barnard Dunkelberg 8 Company Team w j: � � l � �� 'fhe Bamard Dunkelberg � Company Team 1� u �� aQC�F�� ❑ ,.. , • RESOLUTION NO. �'. � �• - A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF FEDERAL WAY, WASHINGTON, REQUESTING PORT OF SEATTLE AND FEDERAL AVIATION ADMINISTRATION ACTION ON MODIFICATIONS TO EXISTING SOUTHBOUND TAKEOFF FLIGHT TRACKS FROM SEATTLE- TACOMA INTERNATIONAL AIRPORT. WHEREAS, the Port of Seattle is conducting a noise evaluation under Federal Aviation Administration ("FAA") regulations, to evaluate aircraft noise and possible measures to alleviate it; and WHEREAS, this evaluation, known as a Part 150 evaluation, has resulted in a series of preliminary recommendations, including recommendations pertaining to sound attenuation for multiple family and mobile homes, modifications to aircraft approach transition zones, and changes to aircraft takeoff flight tracks; and WHEREAS, there are several alternative preliminary recommendations concerning modifications of takeoff flight tracks from Seattle-Tacoma International Airport ("SeaTac"), including a"two track" and a"three track" alternative; and WHEREAS, the City of Federal Way believes that communities should not be protected from aircraft noise at the expense of other communities, upon whom the noise is concentrated; and WHEREAS, some of the preliminary recommendations from Part 150 Study appear to demonstrate that modifying the existing southbound flight tracks from can substantially decrease Res. # , Page 1 ��"�� PAG �...�1.�..C�.�..�... � � �� ; noise from existing flight patters over the City of Federal Way, without resulting in substantial noise increases in other communities; and WHEREAS, the Federal Way City Council wishes to express its preference for such alternative flight track modifications that accomplish this purpose; NOW THEREFORE, THE CITY COUNCIL OF THE CITY OF FEDERAL WAY HEREBY RESOLVES AS FOLLOWS: Section 1. Citv of Federal Wav Fli�ht Track Modification Preferences. The City of Federal Way prefers that flight tracks departing SeaTac Airport in a southbound direction be modified from the current "four post" pattern as follows: A. The"Elma" departure should be modified to direct planes to turn west at 2 DME, and then fly southwesterly over Puget Sound, north of the City of Federal Way, rather than turning at 5 DME and flying due west along S. 320` Street directly over the City of Federal Way. B. The "Mountain" departure should be modified to direct planes to follow an angled departure over the Kent Valley, before turning east bound, rather than turning at 5 DME east along S. 320"' Street. C. A new, late night track for 747s flying to Asia should be created. This new track should be routed south and west following the I-5 corridor, then turning west and/or north only over the Port of Tacoma, rather than flying along S. 320`'' Street directly over the western half of the City of Federal Way. D. Modified departure flight tracks should be specified by fixed orientation points, rather than solely according to elevation, to reduce the possibility of stray aircraft and/or human error. Res. # , Page 2 � �; ; ,1�. .t�1� i Section 2. Requested Port of Seattle and Federal Aviation Administration Action. The City of Federal Way requests that the Port of Seattle seek authorization for the flight track changes outlined in Section 1 above from the FAA, and that the Port pursue such authorization with all available resources. The City of Federal Way also requests that the FAA promptly grant such authorization. Section 3. Severabilitv . If any section, sentence, clause or phrase of this resolution should be held to be invalid or unconstitutional by a court of competent jurisdiction, such invalidity or unconstitutionality shall not affect the validity or constitutionality of any other section, sentence, clause or phrase of this resolution. Section 4. Ratification. Any act consistent with the authority and prior to the effective date of the resolution is hereby ratified and affirmed. Section 5. Effective Date. This resolution shall be effective immediately upon passage by the Federal Way City Council. RESOLVED BY THE CITY COUNCIL OF THE CITY OF FEDERAL WAY, WASHINGTON, this day of , 2000. CITY OF FEDERAL WAY MAYOR, MIKE PARK ATTEST: CITY CLERK, N. CHRISTINE GREEN, CMC Res. # , Page 3 � APPROVED AS TO FORM: CITY ATTORNEY, LONDI K. LINDELL FILED WITH THE CITY CLERK: PASSED BY THE CITY COUNCIL: RESOLUTION NO. ' k:\reso\pt 150 �� `�` a , :�. Res. # , Page 4