# Amendment of Class E Airspace; Dillon, MT
> **Rule** · Final rule. · Published 2020-05-27 · Effective 2020-09-10 · 85 FR 31670
## Document
- **Document number:** 2020-11232
- **Category:** airspace
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 31670
- **Publication date:** 2020-05-27
- **Effective date:** 2020-09-10
- **FAA docket:** Docket No. FAA-2019-0874
## Abstract

This action amends Class E airspace, designated as a surface area, at Dillon Airport, Dillon, MT. This action reduces the radius of the airspace and adds an extension to the northeast of the airport. This action also amends the Class E airspace extending upward from 700 feet above the surface, the action reduces the circular radius around the airport and adds an extension to the southwest of the airport and an extension to the north of the airport. Additionally, this action amends the Class E airspace extending upward from 1,200 feet above the surface. The action significantly reduces the dimensions of the area to properly size it to contain IFR aircraft transitioning to/from the terminal or en route environments. Lastly, this action implements an administrative correction to the Class E airspace designated as a surface area.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/05/27/2020-11232/amendment-of-class-e-airspace-dillon-mt)
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