Native Trout Preservation in the Santa Ana Watershed in Southern California

Status In-progress County Riverside
Project Type Non-mitigation Location 33.74286° N, -117.51063° W Map
Project Area (Acres) No Data Last Updated 20 May 2021
Project Abstract Coldwater Canyon Creek in the Santa Ana River watershed, has one of two remaining native coastal rainbow trout populations of coastal steelhead descent. Project objectives include improving the habitat through in-stream restoration actions and perform a high resolution population genetic study on these rare trout.
Project Groups CDFW Prop 1
Administrative Region California Department of Fish and Wildlife - Hildie Spautz, CDFW

Project Identification

P1596023 CDFW - Prop 1 Grant ID

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
Coldwater Canyon Creek None Restoration (unspecified) Vegetation Management Unknown/unspecified habitat None No Data Implementation in-progress Riparian

Related Habitat Impacts

Impact Project NameHabitatAcres LostType of Loss
No Data


Coldwater Canyon Creek In-progress/Implementation No Data


DateTypeDescriptionSite Name
2018-09-28 Other Fish rescue and relocation, conducted by CDFW. Rescued trout taken to CDFW approved facilities.
2018-08-18 Habitat survey Flow and water quality testing, post-fire
2018-08-10 Other *Approximate date* - Coldwater Canyon burns as a result of the Holy Fire (source: Trabuco Canyon, August 6, 2018)
2018-07-23 Other Trout rescue/recovery.
2018-07-03 Other Trout relocation from lower elevation stream reaches to upper reaches. Lower reaches drying out, upper reaches still flowing and with pools.
2018-06-20 Other Debris removal
2018-05-23 Other Snakeroot and ivy control
2018-03-14 Other Snakeroot and ivy control
2018-01-24 Habitat survey Water quality and flow testing
2017-11-27 Habitat survey Habitat assessment and deadfall debris removal
2017-08-09 Other Snakeroot and ivy control
2017-07-11 Other Snakeroot and ivy control
2017-06-13 Other Snakeroot and ivy control
2017-05-10 Other Ivy control (ground ivy treated with herbicide)
2017-03-24 Other Trout population count and recapture survey
2017-03-13 Other Trout reproduction count
2016-12-28 Habitat survey Fish habitat assessment
2016-11-22 Habitat survey Water flow and quality testing
2016-10-26 Other Snakeroot and ivy control
2016-09-28 Other Deadfall cutting and grapevine canopy trimming
2016-08-24 Habitat survey Water flow and quality testing
2016-06-30 Project start date Estimated date


Agency Staff Gena Lasko California Department of Fish and Wildlife WRGB
Agency Staff Kerwin Russell Riverside-Corona Resource Conservation District Not applicable/Unknown


Funding Need: $44,093

None Restoration (unspecified) CDFW Prop 1 - Watershed Restoration Grant Program $44,093

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
No Data

No files found.

How to Use the Habitat Development Curve

Habitat Development Curves (HDCs) are used to determine the developmental status and trajectory of on-the-ground projects to create, restore, or enhance California wetland and stream habitats. Each HDC is based on assessments of habitat condition for different age areas of one habitat type that in aggregate represent the full spectrum of habitat development. The assessments of condition are provided by expert applications of the California Rapid Assessment Method (CRAM). Visit the CRAM website for more information about CRAM.

For each HDC, reference condition is represented by areas of a habitat that consistently get very high CRAM scores, have not been subject to disruptive management practices, and exist within landscapes that are protected and managed for their natural conditions. The horizontal lines intersecting the top of an HDC represent the mean CRAM score and standard deviation of scores for 25 qualifying reference areas.

The age of a project is estimated as the elapsed time in years between the groundwork end date for the project and the date of the CRAM assessment. To add or update a groundwork end date, use the Project Events form in Project Tracker ( The minimum age in years of a non-project area, including any natural reference area, is estimated from all available local information, including historical maps and imagery, historical written accounts, and place-specific scientific studies of habitat development.

An HDC can be used to address the following questions:

  1. At what time in the future will the area of assessed habitat achieve the reference condition or other milestones in habitat development? The HDC can answer this question if the CRAM score for the assessed area is within the confidence interval of the HDC. The answer is the time in years along the HDC between the current age of the assessed area and the future date corresponding to the intersection of the HDC and the reference condition or other milestone.
  2. Is the area of assessed habitat likely to develop faster, slower, or at the same pace as most other areas of the same habitat type? The habitat area is likely to develop faster, slower, or at the same pace if the CRAM score for the area is above, below, or within the confidence interval of the HDC, respectively.
  3. What can be done to improve the condition of the habitat area or to increase its rate of development? HDCs by themselves cannot answer this question. Possible answers can be inferred by the following analysis that involves HDCs:
    1. Examine the HDC for each of the four CRAM Attributes;
    2. Identify the Attribute(s) scoring below the HDC;
    3. For any low-scoring Attribute, examine the component Metric Scores (note: the Metric Scores for any public CRAM assessment in the CRAM database can be obtained through EcoAtlas);
    4. Assume the low score of an Attribute is due to its low-scoring Metric(s);
    5. Consider modifying the design or management of the habitat area in ways that will sustainably increase its score(s) for the low-scoring Metric(s).

For more information about CRAM Attributes and Metrics, including their scientific rationale, see the CRAM Manual.

Display Habitat Development Curves For Wetland Type:

CRAM Site Scores