Bahia Restoration Phase 1

Status Completed County Marin
Project Type Non-mitigation Location 38.13022° N, -122.53487° W Map
Project Area (Acres) 423.6 Last Updated 18 July 2024
Project Abstract This project restored 200 acres of tidal marsh near mouth of Petaluma River.
Project Groups San Francisco Bay Joint Venture
Administrative Region San Francisco Bay Joint Venture - Jemma Williams, SFBJV

Project Identification

M05-26 BCDC - Permit Number
14 JV - Record Number

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
East Bahia None Restoration/Re-establishment Bay Habitat (SFBJV Only) Tidal marsh 62.00 Completed Fully tidal
East Bahia None Restoration (unspecified) Unspecified Estuarine Wetland Unknown/Unspecified No Data Completed
West Bahia None Monitoring & Evaluation Bay Habitat (SFBJV Only) Tidal marsh No Data Implementation in-progress None
West Bahia None Restoration/Re-establishment Bay Habitat (SFBJV Only) Tidal marsh 361.6 Completed None

Related Habitat Impacts

Impact Project NameHabitatAcres LostType of Loss
No Data


East Bahia Completed 62.00
West Bahia Completed 361.6


DateTypeDescriptionSite Name
2009-01-01 Other SFEP Estuary 2100 Project (from WT)
2008-01-01 Project end date
2008-01-01 Levee breach Breach date derived from Project End Date. Confirmed with aerial imagery (Google Earth). Breach occurred between 5/2008 and 9/2008. West Bahia
2008-01-01 Levee breach Breach date derived from Project End Date, confirmed with aerial imagery (Google Earth), Breach occurred between 9/2008 and 6/2009 East Bahia
2001-11-15 Project start date


Partner Jeff Melby State Coastal Conservancy San Francisco Bay Area Project Manager
Contact Barbara Salzman Marin Audubon Society Not applicable/Unknown


None Restoration/Re-establishment Marin County Open Space District
None Restoration/Re-establishment WCB Wildlife Conservation Board $835,800
None Restoration/Re-establishment CalFed (historic funding program) $727,850
None Restoration/Re-establishment Marin Baylands Advocates $181,314
None Restoration/Re-establishment National Fish and Wildlife Foundation $100,000
None Restoration/Re-establishment USFWS Private Stewardship Grant Program $100,000
None Restoration/Re-establishment SCC State Coastal Conservancy $95,000
None Restoration/Re-establishment Lattner Family Foundation $81,000
None Restoration/Re-establishment California Environmental Protection Agency $56,000
None Restoration/Re-establishment San Francisco Foundation $40,000
None Restoration/Re-establishment Mead Foundation $30,000
None Restoration/Re-establishment National Audubon Society $13,315
None Restoration/Re-establishment Marin County Fisheries and Wildlife Committee $3,636
None Restoration/Re-establishment Patagonia $3,000

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