# Designated Critical Habitat: Revision of Critical Habitat for Snake River Spring/Summer Chinook Salmon
> **Rule** · Final rule. · Published 1999-10-25 · Effective 1999-11-24 · 64 FR 57399
## Document
- **Document number:** 99-27585
- **Category:** endangered-species
- **Species:** salmon
- **Federal Register citation:** 64 FR 57399
- **Publication date:** 1999-10-25
- **Effective date:** 1999-11-24
- **NOAA docket:** Docket No. 990525143-9277-02
## Abstract

Through this rule, NMFS revises critical habitat for Snake River spring/summer chinook salmon (Oncorhynchus tshawytscha), pursuant to the Endangered Species Act (ESA) of 1973. After a review of the best available scientific information, NMFS determines that Napias Creek Falls constitutes a naturally impassable barrier for Snake River spring/summer chinook salmon. NMFS, therefore, excludes areas above Napias Creek Falls from designated critical habitat for this species.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/1999/10/25/99-27585/designated-critical-habitat-revision-of-critical-habitat-for-snake-river-springsummer-chinook-salmon)
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