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Short Citation:
NMFS Office Of Protected Resources, 2024: Chinook Salmon (Snake River fall-run ESU),

Item Identification

Title: Chinook Salmon (Snake River fall-run ESU)
Publication Date: 2017-02-02

Critical habitat includes the water, waterway bottom, and adjacent riparian zone of specified river reaches. Adjacent riparian zones are defined as those areas within a horizontal distance of 300 feet (91.4 m) from the normal line of high water of a stream channel (600 feet or 182.8 m, when both sides of the stream channel are included) or from the shoreline of a standing body of water.


These data represent critical habitat designated (December 28, 1993, 58 FR 68543) under the Endangered Species Act for the Snake River fall-run Chinook salmon ESU.


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
ISO 19115 Topic Category
None Chinook salmon
None critical habitat

Spatial Keywords

Thesaurus Keyword
None Idaho
None Oregon
None Pacific Northwest
None Snake River
None Washington

Physical Location

City: Portland
State/Province: OR

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Data Presentation Form: Map (digital)
Data Set Credit: CREDIT: National Marine Fisheries Service, West Coast Region ORIGINATORS: Interior Columbia Basin Office, West Coast Region, National Marine Fisheries Service; Operations, Management, and Information Division, West Coast Region, National Marine Fisheries Service;

Support Roles

Metadata Contact

CC ID: 1081738
Date Effective From: 2017-02-02
Date Effective To:
Contact (Person): Dunn, Shanna
Email Address:

Point of Contact

CC ID: 1081737
Date Effective From: 2017-02-02
Date Effective To:
Contact (Person): Dunn, Shanna
Email Address:


Currentness Reference: Publication Date

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1081740
W° Bound: -124.083015
E° Bound: -116.03105
N° Bound: 46.703183
S° Bound: 45.242794

Spatial Information

Reference Systems

Reference System 1

CC ID: 1081734

Coordinate Reference System

CRS Type: Geographic 2D
EPSG Code: EPSG:4326
EPSG Name: WGS 84
See Full Coordinate Reference System Information

Access Information

Security Class: Unclassified
Data Use Constraints:

These data are not the official legal definition of critical habitat. The Code of Federal Regulations (50 CFR 226.205) is the source for the legal definition of the critical habitat designation.

Technical Environment


Version 6.2 (Build 9200) ; Esri ArcGIS



National Hydrography Dataset (NHD)

CC ID: 1081729
Contact Role Type: Originator
Contact Type: Organization
Contact Name: United States Geological Survey
Source Contribution:

National Hydrography Dataset (NHD) - NHDFlowline feature class

Process Steps

Process Step 1

CC ID: 1081730

Data creation process 2017.


Data were developed as part of an effort to interpret and depict several salmonid critical habitat designations completed in the 1990s that relied on text-based descriptions but lacked GIS data. Habitat areas for Snake River fall Chinook were identified based on the following:

1) The regulatory definition of ESA critical habitat for this species found at 50 CFR 226.205(c) and the supporting final rule (58 FR 68543, December 28, 1993);

2) The USGS high resolution National Hydrography Dataset (NHD) - downloaded 2015;

3) NMFS recovery planning documents for the Snake River basin;

4) The professional judgment of biologists from the NMFS West Coast Region (Interior Columbia Basin Office and Protected Resources Division), Washington Department of Fish and Wildlife, Oregon Department of Fish and Wildlife, and the Nez Perce Tribe.

We used 2017 StreamNet fish distribution data and the professional judgement of local biologists to map stream reaches presently or historically accessible to Snake River fall Chinook. Where fall Chinook have expanded their range since 1993 when critical habitat was designated, we generally assume that this expansion expresses the species' historic range. However, because the critical habitat designation is limited to the specfic 4th field HUC subbasins identified in 58 FR 68543, even if fall Chinook salmon expand their range in the future to areas upstream from those subbasins - indicating that those upstream reaches may have been "historically accessible" - those additional reaches would not be considered part of designated critical habitat.

The line work comprising this dataset was extracted from the 2015 National Hydrography Dataset, a comprehensive set of digital spatial data that encodes information about naturally occurring and constructed bodies of water, paths through which water flows, and related entities ( The original arcs were split at endpoints identified by NMFS and those arcs not designated as critical habitat were deleted, leaving in this dataset, only those arcs that are considered critical habitat.

Process Date/Time: 2017-02-02 00:00:00

Process Step 2

CC ID: 1081731

FCH_CKSRF_2017.shp (GCS_North_American_1983 wkid 4269) geographic transformation not necessary, saved as CKSRF_ch.shp (GCS_North_American_1983 wkid 4269).

Geometry was not edited, attributes were not edited, metadata was edited.

Process Date/Time: 2019-07-17 00:00:00

Process Step 3

CC ID: 1081732

The 2019 version CKSRF_ch.shp (GCS_North_American_1983 wkid 4269) was converted into the standardized feature class SalmonChinook_SnakeRiverfallrunESU_19931228 (GCS_WGS_84 wkid 4326) using the National Critical Habitat Geodatabase processing protocol.

During standardization, geometry was not edited. Attributes were edited. Metadata was edited and populated using the final rule and metadata from the source FCH_CKSRF_2017.shp (GCS_North_American_1983 wkid 4269).

Migrated field: "GNIS_Name" into "UNIT"

Dropped field: FID

Process Date/Time: 2021-04-26 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity SalmonChinook_SnakeRiverfallrunESU_19931228

Catalog Details

Catalog Item ID: 65291
GUID: gov.noaa.nmfs.inport:65291
Metadata Record Created By: Jonathan Molineaux
Metadata Record Created: 2021-08-31 20:51+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-05-30 18:10+0000
Metadata Record Published: 2022-04-02
Owner Org: OPR
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-04-02
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-04-02