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Short Citation:
NMFS Office Of Protected Resources, 2024: Steelhead (Southern California DPS),

Item Identification

Title: Steelhead (Southern California DPS)
Publication Date: 2005-08-15

Critical habitat includes the stream channels within the designated stream reaches, and includes a lateral extent as defined by the ordinary high-water line (33 CFR 329.11). In areas where the ordinary high-water line has not been defined, the lateral extent will be defined by the bankfull elevation. Bankfull elevation is the level at which water begins to leave the channel and move into the floodplain and is reached at a discharge which generally has a recurrence interval of 1 to 2 years on the annual flood series. Critical habitat in estuaries is defined by the perimeter of the water body as displayed on standard 1:24,000 scale topographic maps or the elevation of extreme high water, whichever is greater.See the final rule (70 FR 52488) for descriptions of areas excluded from this critical habitat designation. Economic exclusions were clipped out of the data. Military areas ineligible for designation due to qualifying Integrated Natural Resources Management Plans (INRMPs) and excluded due to national security impacts were not clipped out of the data.


These data represent critical habitat designated (September 2, 2005, 70 FR 52488) under the Endangered Species Act for the Southern California steelhead DPS.


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
ISO 19115 Topic Category
None critical habitat
None steelhead

Spatial Keywords

Thesaurus Keyword
None California
None Santa Clara River
None Santa Maria River
None Santa Ynez River

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: Southwest Region, National Marine Fisheries Service;

Support Roles

Metadata Contact

CC ID: 1082955
Date Effective From: 2005-08-15
Date Effective To:
Contact (Person): Dunn, Shanna
Email Address:

Point of Contact

CC ID: 1082954
Date Effective From: 2005-08-15
Date Effective To:
Contact (Person): Dunn, Shanna
Email Address:


Currentness Reference: Publication Date

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1082957
W° Bound: -120.650425
E° Bound: -117.438643
N° Bound: 35.0158
S° Bound: 33.385129

Spatial Information

Reference Systems

Reference System 1

CC ID: 1082951

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 226.211) is the source for the legal definition of the critical habitat designation.

Technical Environment


Version 6.2 (Build 9200) ; Esri ArcGIS

Data Quality

Completeness Report:

Clarifications only apply to this feature class.

Military areas ineligible for designation (qualifying INRMP): yes (not clipped)

Military areas excluded due to national security impacts: yes (not clipped)

Indian lands excluded: none

Economic exclusions: yes (clipped out)

Habitat Conservation Plan (HCP) exclusions: none

Unoccupied areas designated: none

Federal Register final rule page:

September 2, 2005, 70 FR 52530

For additional information and maps:

NMFS. 2005. Designation of Critical Habitat for 7 Salmon and Steelhead ESUs in California - Final ESA Section 4(b)(2) Report. NMFS Southwest Region Report. August 2005. 77 pp.2021-05-22T00:00:00Endangered Species Act critical habitat spatial data clarifications



CDFG and PSMFC 1:100,000 scale stream routed hydrography

CC ID: 1082946
Contact Role Type: Originator
Contact Type: Organization
Contact Name: Pacific States Marine Fisheries Commission (PSMFC)
Source Contribution:

The linework for this layer is based on 1:100,000 scale stream routed hydrography.

Process Steps

Process Step 1

CC ID: 1082947

Data creation process 2005.


Stream segments were identified and assigned attributes by Southwest Region (SWR) biologists using 1:100,000 hydrography data and other basemap information on hard copy maps. SWR biologists divided the routed hydrography into stream segments using the best available information to represent local steelhead distribution and habitat. The segments' upper and lower extents were manually marked onto the basemaps by the biologists. This information was then visually interpreted from the paper maps and entered into a digital format using the "Route Tools" extension provided by CDFG. The resulting event table was then used with the CDFG routed hydrography as the route reference to create routed events based on the biologists' segment determinations. The table containing the accompanying segment attribute information was joined using 'GIS_Link' as the related field, and the shapefile 'CH_SC_Steelhead' was created from the routed events. To minimize errors that may have occurred during the process, the completed digital file was compared against the marked maps for consistency. The biologists also reviewed the completed digital file to ensure attribute information was associated with the correct stream segments.

Biologists rated each Calwater (California Watershed Map) Hydrologic Sub-area (HSA) based on occupancy and habitat quanitity and quality information found in the steelhead distribution shapefile (CH_SC_Steelhead). These biological ratings were compared against economic values given to each HSA. Based on whether selected criteria were met, an HSA was determined to be included or excluded from critical habitat. All stream segments were then coded to reflect their HSA's designation. The only exceptions to this occured when a stream segment was valued as a migration corridor (the segment would be included as critical habitat even if the HSA was excluded) or if there were other overriding biological considerations.

Those segments coded as critical habitat were then extracted from the distribution shapfile and placed in the resulting 'SC_Steelhead_Proposed_Critical_habitat' file. Public comments were received following draft publication of the critical habitat proposed rule in December 2004. These comments were incorporated into the data set and the final critical habitat file 'SC_Steelhead_CH_06_2005' was created.

Data layers from the following were used during this process:

California Geospatial Information Data Library, State Coastal Conservancy, California Department of Forestry, US Geological Survey

Process Date/Time: 2005-08-15 00:00:00

Process Step 2

CC ID: 1082948

sc_steelhead_ch_06_2005.shp (California_Teale_Albers_NAD83) geographic transformation not necessary, unprojected -> STSCA_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: 1082949

The 2019 version STSCA_ch.shp (GCS_North_American_1983 wkid 4269) was converted into the standardized feature class Steelhead_SouthernCaliforniaDPS_20050902 (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/CFR and the source sc_steelhead_ch_06_2005.shp (California_Teale_Albers_NAD83).

Migrated fields: "STREAM" into "UNIT" (edited stream/river names to standardize text; the names in the original source file did not match the names in the final rule; generally entire drainages were named the same, populated names using NHD name where possible, deleted if unnamed), SPAWNHAB (value = yes) + REARHAB (value = yes) + MIGRAHAB (value = yes) into "NOTES" (values = spawning, rearing, migration)


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

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity Steelhead_SouthernCaliforniaDPS_20050902

Catalog Details

Catalog Item ID: 65347
GUID: gov.noaa.nmfs.inport:65347
Metadata Record Created By: Jonathan Molineaux
Metadata Record Created: 2021-08-31 20:57+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