Rose Valley Lakes System Alternatives Analysis and Feasibility Study

Status Planning County Ventura
Project Type Non-mitigation Location 34.53721° N, -119.18475° W Map
Project Area (Acres) 1.05 Last Updated 20 May 2021
Project Abstract The purpose of the project is to conduct an alternatives analysis of construction options and a feasibility study to develop restoration options based on the ecologic objectives for removal of aquatic invasive species habitat, reestablish stream connectivity, and the restoration watershed scale processes.
Project Groups CDFW Prop 1 | Education/Outreach
Administrative Region California Department of Fish and Wildlife - Hildie Spautz, CDFW

Project Identification

P1896018 CDFW - Prop 1 Grant ID

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
Rose Valley Lakes Recreation Area - Project Site None Restoration/Re-establishment Unspecified Riverine Wetland Channel 1.05 Planning in-progress Perennial non-tidal

Related Habitat Impacts

Impact Project NameHabitatAcres LostType of Loss
No Data


Rose Valley Lakes Recreation Area - Project Site Planning/Scoping 1.05


DateTypeDescriptionSite Name
2021-03-15 Completion CalTrout submitted Rose Valley Lakes System Alternative Analysis and Feasibility Study - Final Report
2021-01-21 Report CalTrout finalized the Rose Valley Creek Restoration Design Study - Feasibility Report
2020-08-15 Report CalTrout finalized the Rose Valley Creel Restoration Design Study - Construction Options Evaluation Report
2020-05-15 Update CalTrout enters project information in EcoAtlas Project Tracker
2019-10-14 Other CalTrout submits Final Report for NFWF funding associated with this portion of cost share for Construction Option Analysis and Feasibiltiy Assessment
2019-08-20 Other CalTrout finalizes Aquatic Species Assessment for the Sespe Creek Watershed performed by Stillwater Sciences.
2019-08-20 Report CalTrout finalizes Rose Valley Lakes Design Alternatives and Feasibility Study - Existing Conditions Analysis complied by Northwest Hydraulics Consultants.
2018-09-17 Monitoring start Stillwater Sciences begins aquatic species assessment on main stem Sespe Creek.
2018-09-08 Project start date Estimated date
2018-09-07 Other CalTrout and CDFW execute Fisheries Restoration Grant Program funding award to conduct construction option analysis and feasibility assessment phase
2018-08-22 Other CalTrout leads Rose Valley Lakes System Construction Option Analysis and Feasibilty Study - Project Site Tour and Kickoff Meeting at Rose Valley Lakes Recreation Area.
2018-04-19 Other CalTrout and NFWF execute grant award to fund construction option and feasibility assessment phase (cost share with CDFW - FRGP award).


Contact Russell Marlow California Trout South Coast Region - Ventura Office


None Restoration/Re-establishment CDFW Prop 1 - Watershed Restoration Grant Program $194,708

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