Gnoss Field Airport Proposed Runway Extension EIS and EIR
 
 

Proposed Action

On January 9, 2015, the Federal Aviation Administration (FAA) informed Marin County that an updated aviation forecast and a supplement to the June 2014 Final Environmental Impact Statement (EIS) for the Proposed Extension of Runway 13/31, Gnoss Field Airport, Novato, Marin County, California, would be required for the proposed project to proceed.

A Purpose and Need Working Paper dated April 2016 was has been developeddistributed for public comment between May 2, 2016 and June 17, 2016 to provide additional information to the public and regulatory agencies regarding the proposed extension of Runway 13/31 at Gnoss Field Airport, Marin County, California. Based on the comments on the April 2016 Working Paper, the FAA concluded an Updated Purpose and Need Working Paper should be prepared (see Background for more details). On May 18, 2017, the FAA held a public workshop to update the public on the EIS and the progress on the Updated Purpose and Need Working Paper.

The February 2018 Updated Purpose and Need Working Paper provides additional documentation regarding the number of annual aircraft operations by different types of aircraft at Gnoss Field Airport and provides the most current forecast of future aviation activity at the airport. However the February 2018 Working Paper found that the conclusions regarding the necessary runway length for the critical aircraft at Gnoss Field Airport remain the same as identified in the April 2016 Working Paper.

A change in the critical aircraft type at Gnoss Field Airport has reduced the total estimated necessary runway length for the critical aircraft to operate on a hot day at Gnoss Field Airport from 4,400 feet, as identified in the June 2014 Final EIS, to 3,600 feet. As Runway 13/31 is currently 3,300 feet long, the current total necessary runway length of 3,600 feet could be obtained with a 300-foot runway extension, instead of the 1,100-foot runway extension identified in the June 2014 Final EIS. The FAA is requesting public comments on the Updated Purpose and Need Working Paper as part of an additional National Environmental Policy Act (NEPA) public scoping effort for this project prior to preparing a Supplement to the Final EIS. You may submit comments on the Purpose and Need Working Paper from February 16, 2018 to April 6, 2018, or at the March 20, 2018 public meeting as described in the Public Notice.

The revised Proposed Project described in the Purpose and Need Working Paper includes the following:

  • Shift Runway 13/31 106 feet to the north and extend Runway 13/31 300 feet to the northwest from 3,300 feet to a total length of 3,600 feet while maintaining the 75-foot width of the runway;
  • Relocate existing taxiways accessing south end of Runway 13/31 to new runway end.
  • Extend the parallel taxiway to the full length of the runway maintaining the existing runway to taxiway separation distance of 155 feet;
  • Widen the existing Runway Safety Area (RSA) along the sides of Runway 13/31 from its existing width of 120 feet centered on the runway centerline to a RSA width of 150 feet centered on the runway centerline to meet current FAA B-II airport design standards;
  • Extend RSA to 300 feet long beyond each end of the shifted Runway 13/31 to meet current FAA B-II airport design standards;
  • Corresponding realignment of drainage channels to drain the extended runway and taxiway;
  • Corresponding levee extension to protect the extended runway and taxiway from flooding; and
  • Relocate the existing Precision Approach Path Indicator (PAPI) navigational aids that pilots use to land at the Airport to reflect the extended runway.

Schedule:

The Final Environmental Impact Report was released on November 8th, 2013.

Marin County Board of Supervisors Certified the Final Environmental Impact Report for the Gnoss Field Proposed 13/31 Runway Extension Project on February 11, 2014.

The Final Environmental Impact Statement was released for Public Comment in June 2014.

The FAA informed Marin County on January 9, 2015 that a supplement to the Final Environmental Impact Statement was required.

FAA issues Purpose and Need Working Paper for public comment May 2, 2016 to June 17, 2016 as an additional public scoping opportunity prior to development of a Supplement to the Final Environmental Impact Statement.

Marin County provides Notice to Proceed to Environmental Impact Statement consultant to start preparation of Supplement to Final Environmental Impact Statement in June/July 2016.

FAA has issue the Updated Purpose and Need Working Paper for public comment from February 20, 2018 to April 6, 2018, with a March 20, 2018 public meeting, as an additional public scoping opportunity prior to development of a Supplement to the Final Environmental Impact Statement.

Draft Supplement to Federal Aviation Administration Final Environmental Impact Statement anticipated available for public review in May 2019. April 2017

Final Supplement to Federal Aviation Administration Final Environmental Impact Statement anticipated to be released in February 2020.

Marin County is currently evaluating whether any changes to its Certified Final Environmental Impact Report are required.

The Federal Aviation Administration may sign a Record of Decision on the Final EIS and Supplement to the Final EIS after 30 days have passed since the issuance of the Supplement to Final EIS. with updated supplement.