# Modification of Class E Airspace; Colusa County Airport, Colusa, CA
> **Rule** · Final rule. · Published 2025-05-13 · Effective 2025-08-07 · 90 FR 20233
## Document
- **Document number:** 2025-08295
- **Category:** airspace
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 90 FR 20233
- **Publication date:** 2025-05-13
- **Effective date:** 2025-08-07
- **FAA docket:** Docket No. FAA-2024-2048
## Abstract

This action modifies the Class E airspace extending upward from 700 feet above the surface of the earth and removes the Class E airspace extending upward from 1,200 feet above the surface at Colusa County Airport, Colusa, CA. Additionally, this action proposes administrative amendments to update the airport's Class E airspace legal description. These actions will support the safety and management of instrument flight rules (IFR) operations at the airport.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/05/13/2025-08295/modification-of-class-e-airspace-colusa-county-airport-colusa-ca)
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