# Modification of Class E Airspace; Alamosa, CO
> **Rule** · Final rule. · Published 2009-01-15 · Effective 2009-03-12 · 74 FR 2350
## Document
- **Document number:** E9-325
- **Category:** airspace
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 74 FR 2350
- **Publication date:** 2009-01-15
- **Effective date:** 2009-03-12
- **FAA docket:** Docket No. FAA-2008-0982
## Abstract

This action will amend Class E airspace at Alamosa, CO. Additional controlled airspace is necessary to accommodate aircraft using a new Area Navigation (RNAV) Global Positioning System (GPS) Standard Instrument Approach Procedure (SIAP) at San Luis Valley Regional Airport/Bergman Field. This will improve the safety of Instrument Flight Rules (IFR) aircraft executing the new RNAV GPS SIAP at San Luis Valley Regional Airport/Bergman Field, CO.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2009/01/15/E9-325/modification-of-class-e-airspace-alamosa-co)
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