# Establishment and Modification of Class E Airspace; Williston Basin, ND
> **Rule** · Final rule. · Published 2021-07-15 · Effective 2021-10-07 · 86 FR 37234
## Document
- **Document number:** 2021-15017
- **Category:** airspace
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 86 FR 37234
- **Publication date:** 2021-07-15
- **Effective date:** 2021-10-07
- **FAA docket:** Docket No. FAA-2021-0292
## Abstract

This action establishes a Class E airspace area, designated as an extension to a Class D or Class E surface area, at Williston Basin International Airport, Williston, ND. This action also modifies the Class E airspace extending upward from 700 feet above the surface. The airspace modifications support the establishment of new instrument procedures for runways 04 and 22. This action also updates the geographic coordinates in the Class E2 and Class E5 text headers. The airspace supports instrument flight rules (IFR) operations at the airport.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2021/07/15/2021-15017/establishment-and-modification-of-class-e-airspace-williston-basin-nd)
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