# 2025-00113: Modification & Establishment of Class E Airspace; Cortez Municipal Airport, Cortez, CO

2025-00113, Modification & Establishment of Class E Airspace; Cortez Municipal Airport, Cortez, CO, is a Federal Register proposed rule from an unnamed agency published 2025-01-16, effective This Class E airspace area is effective during the specific dates and times established in advance by a Notice to Air Missions. The effective date and time will thereafter be continuously published in the Chart Supplement. (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2025-00113
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-00113
- Title: Modification & Establishment of Class E Airspace; Cortez Municipal Airport, Cortez, CO
- Type: Proposed Rule
- Agencies: unknown
- Citation: unknown
- Published: 2025-01-16
- Effective: This Class E airspace area is effective during the specific dates and times established in advance by a Notice to Air Missions. The effective date and time will thereafter be continuously published in the Chart Supplement.
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-11

## Summary

The FAA wants to update and add new Class E airspace around Cortez Municipal Airport in Colorado to keep flights safe and smooth, especially for pilots using instruments. These changes affect pilots flying in and out of Cortez and help manage air traffic better. If you have thoughts, send them by March 3, 2025—no costs or fees involved!

## Abstract

This action proposes to modify the Class E airspace designated as a surface area, modify the Class E airspace extending upward from 700 feet above the surface, and establish Class E airspace designated as an extension to a Class E surface area at Cortez Municipal Airport, Cortez, CO. Additionally, this action proposes administrative amendments to update the airport's legal descriptions. These actions would support the safety and management of instrument flight rules (IFR) operations at the airport.

## Effects PRIA read

- Class E Airspace Geometry Changed: benefit, medium. The FAA proposes to change the shape and size of the Class E airspace at Cortez Municipal Airport, CO. Key changes include a Class E surface-area radius of 4.8 miles, extensions to 5.6 miles northeast and 7.2 miles southwest, reducing the 700-foot-above-surface central radius to 6.1 miles (from 7 m…
- New 8x8-Mile Surface Extension, No Radio Rule: benefit, low. The FAA proposes to establish an approximately 8 x 8 mile extension to the Class E surface area northeast of the airport to contain arriving IFR aircraft below 1,000 feet. The proposal explicitly states this extension would contain those operations "without imposing a 2-way radio communication requ…
- FAA Says Minimal Economic Impact on Small Entities: benefit, low. The FAA certified that this proposed airspace amendment "will not have a significant economic impact on a substantial number of small entities" and described the anticipated impact as minimal. The FAA determined the rule is routine technical airspace regulation and not a significant regulatory acti…

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## Sources
- [2025-00113 on federalregister.gov](https://www.federalregister.gov/documents/2025/01/16/2025-00113/modification-and-establishment-of-class-e-airspace-cortez-municipal-airport-cortez-co)
- [2025-00113 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-01-16/pdf/2025-00113.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2025-00113 (as of 2026-06-11).