Western Stege Marsh Restoration

Status In-progress County Contra Costa
Project Type Non-mitigation Location 37.91164° N, -122.33526° W Map
Project Area (Acres) 20.00 Last Updated 13 July 2018
Project Abstract The project restored tidal salt marsh habitat for Ridgway's rail and other wildlife through restoration of adjacent coastal prairie grassland, removal and control of invasive species and native plant vegetation. Additional enhancements and pollution and trash removal activities are being considered.
Project Groups San Francisco Bay Joint Venture Project Tours | San Francisco Bay Restoration Authority (Eligible)

Project Identification

M01-52 BCDC - Record Number
267 JV - Record Number
281350 USACE - File Number

Habitat Plan

ActivityHabitatSubHabitatAcresActivity StatusWater Regime
Enhancement Bay Habitat (SFBJV Only) Tidal marsh 10.00 Planning/Scoping Unknown/Unspecified
Restoration Bay Habitat (SFBJV Only) Tidal marsh 10.00 Completed Fully tidal

Related Habitat Impacts

HabitatAcres LostType of Loss
No Data


Western Stege Marsh Restoration In-progress/Implementation 20.00


DateTypeDescriptionSite Name
2003-09-04 Permit USACE permit issued
2003-07-25 Report Restoration Plan issued.
2003-01-01 Project start date
2002-06-27 Permit BCDC record number issued.


Contact Greg Haet University of California, Berkeley Environmental Health and Safety
Contact Karl Hans University of California, Berkeley Environmental Health and Safety
Contact Alicia Bihler University of California, Berkeley - Environmental Health and Safety Not applicable/Unknown


Funding Need: $500,000

No Data

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
No Data

Performance Criteria

StatusDetailsEvaluation Date
Original criteria See additional sheets taken from "Richmond Field Station Remediation Project Biological Assessment Report" dated July 2003 and submitted by B.B.L. 2006-06-01
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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 (ptrack.ecoatlas.org). 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.

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CRAM Site Scores