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###### Department of Transportation

###### Federal Aviation Administration

          - 14 CFR Part 71
          - [Docket No. FAA-2021-0210; Airspace Docket No. 21-ANM-3]
          - RIN 2120-AA66

# AGENCY:

Federal Aviation Administration (FAA), DOT.

# ACTION:

Final rule.

# SUMMARY:

This action modifies the Class E airspace extending upward from 1,200 feet above the surface at Dillon Airport, Dillon, MT. The airspace is designed to support instrument flight rules (IFR) operations at the airport.

# DATES:

Effective 0901 UTC, October 7, 2021. The Director of the Federal Register approves this incorporation by reference action under 1 CFR part 51, subject to the annual revision of FAA Order 7400.11 and publication of conforming amendments.

# ADDRESSES:

                        FAA Order 7400.11E, Airspace Designations and Reporting Points, and subsequent amendments can be viewed online at                         *https://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 7400.11E at NARA, email                         *fedreg.legal@nara.gov*                         or go to                         *https://www.archives.gov/​federal-register/​cfr/​ibr-locations.html.*

# FOR FURTHER INFORMATION CONTACT:

Matthew Van Der Wal, Federal Aviation Administration, Western Service Center, Operations Support Group, 2200 S 216th Street, Des Moines, WA 98198; telephone (206) 231-3695.

# SUPPLEMENTARY INFORMATION:

## Authority for This Rulemaking

                    The FAA's authority to issue rules regarding aviation safety is found in                           ( print page 34627)                        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 modifies the Class E airspace at Dillon Airport, Dillon, MT, to ensure the safety and management of IFR operations at the airport.                

### History

                    The FAA published a notice of proposed rulemaking in the                     **Federal Register**                     (86 FR 18484; April 9, 2021) for Docket No. FAA-2021-0210 to modify the Class E airspace at Dillon Airport, Dillon, MT. Interested parties were invited to participate in this rulemaking effort by submitting written comments on the proposal to the FAA. One comment, in favor of the airspace modification, was received.                

Class E5 airspace designations are published in paragraph 6005 of FAA Order 7400.11E, dated July 21, 2020, and effective September 15, 2020, which is incorporated by reference in 14 CFR 71.1. The Class E airspace designation listed in this document will be published subsequently in the Order.

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

                    This document amends FAA Order 7400.11E, Airspace Designations and Reporting Points, dated July 21, 2020, and effective September 15, 2020. FAA Order 7400.11E is publicly available as listed in the                     **ADDRESSES**                     section of this document. FAA Order 7400.11E lists Class A, B, C, D, and E airspace areas, air traffic service routes, and reporting points.                

### The Rule

This amendment to 14 CFR part 71 modifies the Class E airspace, extending upward from 1,200 feet above the surface, at Dillon Airport, Dillon, MT. This airspace is designed to contain IFR aircraft transitioning to/from the terminal and en route environments. This action increases the airspace's radius from “25 miles” to “50 miles” around the airport. The 50-mile radius will properly contain IFR aircraft transitioning to/from the airport.

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

### 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

The FAA has determined that this action qualifies for categorical exclusion under the National Environmental Policy Act in accordance with FAA Order 1050.1F, “Environmental Impacts: Policies and Procedures,” paragraph 5-6.5a. This airspace action is not expected to cause any potentially significant environmental impacts, and no extraordinary circumstances exist that warrant the preparation of an environmental assessment.

# List of Subjects in 14 CFR Part 71

      - Airspace
      - Incorporation by reference
      - Navigation (air)

## Adoption of the Amendment

In consideration of the foregoing, the Federal Aviation Administration amends 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 7400.11E, Airspace Designations and Reporting Points, dated July 21, 2020, and effective September 15, 2020, 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 Dillon, MT [Amended]

Dillon Airport, MT

(Lat. 45°15′19′′ N, long. 112°33′09′′ W)

That airspace extending upward from 700 feet above the surface within a 5.2-mile radius of the airport, and within 3 miles each side of the 205° bearing from the airport, extending from the 5.2-mile radius to 9.9 miles southwest of the airport, and that airspace within 8 miles west and 4 miles east of the 005° bearing from the airport, extending from the 5.2-mile radius to 16 miles north of the airport; and that airspace extending upward from 1,200 feet above the surface within a 50-mile radius of Dillon Airport. 

Issued in Des Moines, Washington, on June 24, 2021.

B.G. Chew,

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

[FR Doc. 2021-13895 Filed 6-29-21; 8:45 am]

BILLING CODE 4910-13-P