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###### Department of Transportation

###### Federal Aviation Administration

          - 14 CFR Part 71
          - [Docket No. FAA-2017-0737; Airspace Docket No. 16-ANM-12]

# AGENCY:

Federal Aviation Administration (FAA), DOT.

# ACTION:

Notice of proposed rulemaking (NPRM).

# SUMMARY:

This action proposes to establish Class E airspace extending upward from 700 and 1,200 feet above the surface, at Twin Bridges Airport, Twin Bridges, MT, to accommodate new area navigation (RNAV) procedures at the airport. This action would ensure the safety and management of Instrument Flight Rules (IFR) operations within the National Airspace System.

# DATES:

Comments must be received on or before October 12, 2017.

# ADDRESSES:

                        Send comments on this proposal to the U.S. Department of Transportation, Docket Operations, 1200 New Jersey Avenue SE., West Building Ground Floor, Room W12-140, Washington, DC 20590; telephone: 1-800-647-5527, or (202) 366-9826. You must identify FAA Docket No. FAA-2017-0737; Airspace Docket No. 16-ANM-12, at the beginning of your comments. You may also submit comments through the Internet at                         *http://www.regulations.gov.*

                        FAA Order 7400.11A, Airspace Designations and Reporting Points, and subsequent amendments can be viewed online at                         *http://www.faa.gov/​air_​traffic/​publications/​.*                         For further information, you can contact the Airspace Policy Group, Federal Aviation Administration, 800 Independence Avenue SW., Washington, DC 20591; telephone: (202) 267-8783. The Order is also available for inspection at the National Archives and Records Administration (NARA). For information on the availability of FAA Order 7400.11A at NARA, call (202) 741-6030, or go to                         *http://www.archives.gov/​federal_​register/​code_​of_​federal-regulations/​ibr_​locations.html.*

FAA Order 7400.11, Airspace Designations and Reporting Points, is published yearly and effective on September 15.

# FOR FURTHER INFORMATION CONTACT:

Tom Clark, Federal Aviation Administration, Operations Support Group, Western Service Center, 1601 Lind Avenue SW., Renton, WA 98057; telephone (425) 203-4511.

# SUPPLEMENTARY INFORMATION:

## Authority for This Rulemaking

                    The FAA's authority to issue rules regarding aviation safety is found in Title 49 of the United States Code. Subtitle I, Section 106 describes the authority of the FAA Administrator. Subtitle VII, Aviation Programs, describes in more detail the scope of the agency's authority. This rulemaking is promulgated under the authority described in Subtitle VII, Part A, Subpart I, Section 40103. Under that section, the FAA is charged with prescribing regulations to assign the use of airspace necessary to ensure the safety of aircraft and the efficient use of airspace. This regulation is within the scope of that authority as it would establish Class E airspace to support                           ( print page 40741)                        new RNAV procedures at Twin Bridges Airport, Twin Bridges, MT.                

## Comments Invited

Interested parties are invited to participate in this proposed rulemaking by submitting such written data, views, or arguments, as they may desire. Comments that provide the factual basis supporting the views and suggestions presented are particularly helpful in developing reasoned regulatory decisions on the proposal. Comments are specifically invited on the overall regulatory, aeronautical, economic, environmental, and energy-related aspects of the proposal. Communications should identify both docket numbers and be submitted in triplicate to the address listed above. Persons wishing the FAA to acknowledge receipt of their comments on this notice must submit with those comments a self-addressed, stamped postcard on which the following statement is made: “Comments to Docket No. FAA-2017-0737; Airspace Docket No. 16-ANM-12”. The postcard will be date/time stamped and returned to the commenter.

All communications received before the specified closing date for comments will be considered before taking action on the proposed rule. The proposal contained in this notice may be changed in light of the comments received. A report summarizing each substantive public contact with FAA personnel concerned with this rulemaking will be filed in the docket.

## Availability of NPRMs

                    An electronic copy of this document may be downloaded through the Internet at                     *http://www.regulations.gov.*                     Recently published rulemaking documents can also be accessed through the FAA's Web page at                    *http://www.faa.gov/​air_​traffic/​publications/​airspace_​amendments/​.*

                    You may review the public docket containing the proposal, any comments received, and any final disposition in person in the Dockets Office (see the                     **ADDRESSES**                     section for the address and phone number) between 9:00 a.m. and 5:00 p.m., Monday through Friday, except federal holidays. An informal docket may also be examined during normal business hours at the Northwest Mountain Regional Office of the Federal Aviation Administration, Air Traffic Organization, Western Service Center, Operations Support Group, 1601 Lind Avenue SW., Renton, WA 98057.                

## Availability and Summary of Documents Proposed for Incorporation by Reference

                    This document proposes to amend FAA Order 7400.11A, Airspace Designations and Reporting Points, dated August 3, 2016, and effective September 15, 2016. FAA Order 7400.11A is publicly available as listed in the                     **ADDRESSES**                     section of this document. FAA Order 7400.11A lists Class A, B, C, D, and E airspace areas, air traffic service routes, and reporting points.                

## The Proposal

The FAA is proposing an amendment to Title 14 Code of Federal Regulations (14 CFR) Part 71 by establishing Class E airspace extending upward from 700 feet above the surface at Twin Bridges Airport, Twin Bridges, MT, within a 4.1-mile radius of the airport and within 4.1 miles each side of the 011° bearing from the airport extending to 12 miles north of the airport, and within 4.1 miles each side of the 195° bearing from the airport extending to 13.5 miles south of the airport.

Additionally, this proposal would establish Class E airspace extending upward from 1,200 feet above the surface within a 20-mile radius of Twin Bridges Airport This proposed airspace is necessary to support the new RNAV procedures for runways 17 and 35 for the safety and management of IFR operations at the airport.

Class E airspace designations are published in paragraph 6005 of FAA Order 7400.11A, dated August 3, 2016, and effective September 15, 2016, which is incorporated by reference in 14 CFR 71.1. The Class E airspace designations listed in this document will be published subsequently in the Order.

## Regulatory Notices and Analyses

The FAA has determined that this regulation only involves an established body of technical regulations for which frequent and routine amendments are necessary to keep them operationally current, is non-controversial and unlikely to result in adverse or negative comments. It, therefore: (1) Is not a “significant regulatory action” under Executive Order 12866; (2) is not a “significant rule” under DOT Regulatory Policies and Procedures (44 FR 11034; February 26, 1979); and (3) does not warrant preparation of a regulatory evaluation as the anticipated impact is so minimal. Since this is a routine matter that will only affect air traffic procedures and air navigation, it is certified that this rule, when promulgated, would not have a significant economic impact on a substantial number of small entities under the criteria of the Regulatory Flexibility Act.

## Environmental Review

This proposal will be subject to an environmental analysis in accordance with FAA Order 1050.1F, “Environmental Impacts: Policies and Procedures” prior to any FAA final regulatory action.

# List of Subjects in 14 CFR Part 71

      - Airspace
      - Incorporation by reference
      - Navigation (air)

## The Proposed Amendment

Accordingly, pursuant to the authority delegated to me, the Federal Aviation Administration proposes to amend 14 CFR part 71 as follows:

# PART 71—DESIGNATION OF CLASS A, B, C, D, AND E AIRSPACE AREAS; AIR TRAFFIC SERVICE ROUTES; AND REPORTING POINTS

1. The authority citation for 14 CFR part 71 continues to read as follows:

Authority:49 U.S.C. 106(f), 106(g), 40103, 40113, 40120; E.O. 10854, 24 FR 9565, 3 CFR, 1959-1963 Comp., p. 389.

§ 71.1

2. The incorporation by reference in 14 CFR 71.1 of FAA Order 7400.11A, Airspace Designations and Reporting Points, dated August 3, 2016, and effective September 15, 2016, is amended as follows:

### Paragraph 6005 Class E Airspace Areas Extending Upward From 700 Feet or More Above the Surface of the Earth.

* * * * *

## ANM MT E5 Twin Bridges, MT [New]

Twin Bridges Airport, MT

(Lat. 45°32′07″ N., long. 112°18′08″ W.)

That airspace extending upward from 700 feet above the surface within a 4.1 mile radius of Twin Bridges Airport, and within 4.1 miles each side of the 011° bearing from the airport extending to 12 miles north of the airport, and within 4.1 miles each side of the 195° bearing from the airport extending to 13.5 miles south of the airport; and that airspace upward from 1,200 feet above the surface within a 20-mile radius of Twin Bridges Airport.

Issued in Seattle, Washington, on August 16, 2017.

David G. Parker,

Acting Group Manager, Operations Support Group, Western Service Center.

[FR Doc. 2017-17988 Filed 8-25-17; 8:45 am]

 BILLING CODE 4910-13-P