updated final faa dvo seis - public hearing 08-12-2019.pptgnossfieldeis-eir.com/pdf/updated final...
TRANSCRIPT
Date:
Federal Aviation
Administration
Public Hearing
Draft
Supplement to theFinal Environmental ImpactStatement
Extend Runway 13/31
Gnoss Field Airport
August 22, 2019
Gnoss Field Airport
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I. Introduction
• County of Marin:
Airport Project Sponsor
• Federal Aviation Administration:
Approve/Disapprove Airport Layout Plan Change
NEPA Lead Agency – Approve EIS
• Landrum & Brown:
Environmental Consultant for EIS
Gnoss Field Airport
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II. Purpose of Public Meeting
• Update the public on the status of the EnvironmentalImpact Statement (EIS)
• Receive public comments on the Draft Supplementto the Final EIS (SEIS)
Gnoss Field Airport
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EIS/EIR Processing and Status Update
Marin CountyPreparesFinal EIR
CONDUCTPUBLIC
HEARING2012
Respond toAgency/Public
Comments
Agency/PublicCirculation
Notice of
Availabilityof Draft EIS/EIR &
Public Hearing
Prepare Draft
EIS & EIR
Detailed
Environmental
Analysis
CONDUCTSCOPING
DevelopPreliminaryRange of
Alternatives
Baseline DataCollection
ISSUE NOTICEOF INTENT &NOTICE OF
PREPARATION
Identify Purpose& Need
ProjectIdentification
Marin County is Here
FAADetermines
Supplement tothe Final EIS is
Required
Final EIRAvailabilityNov 2013
Marin CountyCertifies EIR
Feb 2014
FAAPreparesFinal EIS
Final EISAvailabilityJune 2014
Marin CountyUpdates Final
EIR (if needed)
Marin CountyProject Decision
Gnoss Field Airport
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FAA Signs/IssuesRecord of Decision
Goal – Fall 2019
FAA Issues FinalSupplement to the
Final EISGoal – Fall 2019
Notice of
Availabilityof Final
Supplement to theFinal EIS
Goal - Fall 2019
Consider Agency/Public Comments
Prepare UpdatedPurpose andNeed Working
Paper2018
Consider Agency /Public Comments
FAADetermines
Supplement tothe Final EIS is
Required
2015Circulate Purpose
and NeedWorking Paper for
Agency/PublicComment
2016
PreparePurpose and
Need WorkingPaper
CONDUCTPUBLIC
MEETING2016
Circulate UpdatedWorking Paper for
Agency/PublicComment
CONDUCTPUBLIC
MEETING2018
Prepare DraftSupplement to the
Final EIS2018 - 2019
Agency/PublicCirculation
2019
CONDUCTPUBLIC
HEARING2019
Respond toAgency/
Public Comments
EIS Processing and Status Update
Gnoss Field Airport
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III. Status of the EIS
• FAA released the Final EIS in June 2014, but didnot issue a Record of Decision
• FAA notified Marin County in January 2015 that anupdated aviation forecast and Supplement to theFinal EIS were needed
Gnoss Field Airport
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III. Status of the EIS
• FAA published the Purpose and Need WorkingPaper in April 2016 for public review and comment.
• Identified a different, less demanding, criticalaircraft, and identified needed runway extension as300 feet instead of 1,100 feet.
• Commenters stated that additional investigation ofVisual Flight Rules flights and fuel receipts wouldshow additional activity of jet aircraft with longerrunway length requirement.
• Marin County and FAA agreed to review additionaldata
Gnoss Field Airport
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III. Status of the EIS• FAA published the Updated Purpose and Need
Working Paper in February 2018 for review andcomment
– February 2018 Working Paper consistent with results of 2016Working Paper
– 300’ runway extension justified for current critical aircraft
• Family of turboprop aircraft with wingspan at least 49 feet but <79 feet
• approach speed < 121 knots, (airport reference code B-II)
• FAA prepares and publishes the Draft Supplement tothe Final EIS (SEIS)• Receive and Review Comments• Publish Final SEIS• Issue Record of Decision
Gnoss Field Airport
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Gnoss Field
• One Runway (13/31) - 3,300Feet
• 82,730 Takeoff/Landing a Year
• Single and Twin EnginePropeller Aircraft, SmallBusiness Jets
• System of Levees ProtectRunway from Flooding
• Airport has operational noiseabatement procedures
IV. Existing Airport
N
Gnoss Field Airport
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IV. Existing Airport-Noise Abatement
N
Gnoss Field Airport
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Gnoss Field
• Typical Aircraft that useGnoss Field Airport -Single and Twin EnginePropeller Aircraft, SmallBusiness Jets
IV. Existing Airport
1 Source: FAA Advisory Circular 150/5300-13A “Airport Design”
Table 1-1AIRPORT REFERENCE CODES FOR AIRCRAFT TYPICALLYOPERATING AT GNOSS FIELD AIRPORT
AIRPORTREFERENCE CODE1
AIRCRAFTCHARACTERISTICS
EXAMPLE AIRCRAFT TYPE
A-I
Approach Speed:Less than 91 knots
Wingspan:Less than 49 feet
Cessna 172
B-I
Approach Speed:91 knots or greater, but
less than 121 knotsWingspan:
Less than 49 feet
Cessna 525
B-II
Approach Speed:91 knots or greater, but
less than 121 knotsWingspan:
49 feet or greater, butless than 79 feet
Beechcraft Super King Air 200(family grouping of critical aircraft)
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Need for Sufficient Runway Length
• Existing runway length (3,300 feet) cannot fullyaccommodate the existing aviation activity, asrepresented by the family grouping of critical aircraftthat regularly uses the Airport under hot weatherconditions (Turboprop aircraft with wingspan at least 49 feetbut <79 feet, approach speed < 121 knots, airport referencecode B-II)
• The purpose of the proposed runway extensionproject is to: allow existing aircraft, as represented bythe family grouping of critical aircraft at Gnoss FieldAirport, to operate without operational weightrestrictions under hot weather conditions
V. Purpose and Need
Gnoss Field Airport
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Need for Sufficient Runway Length
• The “critical aircraft” is the most demanding aircraft interms of the physical dimensions of the airport such as thelength and width of runways and taxiways, that regularlyuses an airport*
• Regular use of an airport is defined as 500 or moreitinerant operations (takeoffs and landings) of the criticalaircraft*
• Runway length determination is based on the requirementsof the critical aircraft
*Definitions based on FAA Order 5090.3C Field Formulation of the National Plan ofIntegrated Airport Systems (NPIAS) and FAA Advisory Circular 150/5000-17 Critical Aircraftand Regular Use Determination
V. Purpose and Need
Gnoss Field Airport
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Need for Sufficient Runway Length
• For FAA runway length calculation purposes, hotweather is defined as the mean daily maximumtemperature of the hottest month
• Mean daily maximum of hottest month = 82 degrees Fin July, August, and September per National Oceanic& Atmospheric Administration data
• Existing runway length (3,300 feet) can result inoperational weight restrictions for some moredemanding aircraft in hot weather
• Aircraft must either reduce fuel or reduce thepassengers and/or cargo
V. Purpose and Need
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• Shift Runway 13/31 106 feet to the north and extendthe runway 300 feet to the north
• Shifting runway keeps entire project within current airportproperty boundary
• Extend the corresponding taxiway to the full length ofthe runway
• Construct standard Runway Safety Areas for B-IIaircraft
• Levee extension and realignment of drainage
• Re-program the navigational aids that pilots use toland at the Airport to reflect the extended runway
VI. FAA’s Preferred Alternative
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VII. Proposed Runway Improvements
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• Alternative A: No Action
• Alternative B (Sponsor’s Proposed Project): Extend runway to thenorthwest by 1,100 feet
• Alternative D: Extend runway to the southeast by 240 feet and to thenorthwest by 860 feet
• Alternative E (FAA’s Preferred Alternative): Shift Runway northwest by 106feet and extend runway to the northwest by 300 feet
VIII. Alternatives Considered
Alternative A
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Alternative B
Alternative D
Alternative B
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Alternative E
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IX. Alternative RejectedAlternative C: Extend runway southeast by 1,100 feetNot carried forward for further analysis in EIS because:
– Greater wetland impacts– Operational Difficulties– Closer to Residential Areas– Higher Cost including off-airport property acquisition
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Noise
• Federal significant noise threshold in decibelsCommunity Noise Equivalent Level (dB CNEL) is65 dB CNEL
• No homes currently exposed to 65 dB CNEL
• No significant noise impact under Alternative B,Alternative D, or Alternative E
• No existing homes or planned residential areasexposed to 65 dB CNEL under any alternative
X. Environmental Consequences
Gnoss Field Airport
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X. Environmental ConsequencesWetlands
• No Action - No wetlands impact
• Alternative B (Sponsor’s Proposed Project) - Impact 11.83acres of wetlands
• Alternative D - Impact 12.73 acres of wetlands
• Alternative E (FAA’s Preferred Alternative) - Impact 7.27acres of wetlands
Wetland Mitigation:
• Feasible wetlands mitigation sites identified in Draft SEIS
• Consultation between County and Federal Agencies mayidentify other mitigation options
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Threatened and Endangered Species
• Salt Marsh Harvest Mouse & California Clapper Rail (Ridgeway’s Rail)
• Habitat Impacts
– No Action: No Impact
– Alternative B (Sponsor’s Proposed Project): Permanent removal of6.88 acres of wildlife habitat and temporary removal of 16.05 acres ofhabitat.
– Alternative D: Permanent removal of 8.24 acres wildlife habitat andtemporary removal of 18.43 acres of habitat.
– Alternative E (FAA’s Preferred Alternative): Permanent removal of 5.60acres of wildlife habitat and temporary removal of 12.74 acres of habitat.
• Habitat Mitigation
– Mitigation options identified in Draft SEIS
– Consultation between County and Federal Agencies may identify othermitigation options
X. Environmental Consequences
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• Air Quality• Water Quality• Floodplains• Farmlands• Energy Supply &
Natural Resources• Compatible Land Use• Socioeconomic Impacts• Visual Resources (Including
Light Emissions &Visual Impacts)
• Hazardous Materials• Coastal Resources• Wild and Scenic Rivers• Construction Impacts• Secondary Impacts• Cumulative Impacts
Areas of No Significant Environmental Impact
X. Environmental Consequences
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XI. Next Steps
• Document available at www.gnossfieldeis-eir.com
• Three ways to comment on the Draft SEIS:- Make a comment at Public Hearing today
- Write a comment and leave it in the comment box
- Send a comment to Doug Pomeroy, FAA on or beforeSeptember 6, 2019
Mr. Doug PomeroyFederal Aviation AdministrationSan Francisco Airport District Office1000 Marina Boulevard, Suite 220Brisbane, CA 94005-1835Telephone: 650-827-7612 Fax: (650) 827-7635