San Francisco Estuary Invasive Spartina Eradication and Restoration Project

Status In-progress County Marin, Napa, San Francisco, San Mateo, Santa Clara, Solano, Sonoma
Project Type Non-mitigation Location 37.83491° N, -122.37530° W Map
Project Area (Acres) 70,000 Last Updated 21 January 2020
Project Abstract This is a coordinated effort to eradicate invasive cordgrass across 60,000 acres of tidal marshes and mudflats in SF Bay. Invasive cordgrass negatively impacts wildlife habitat and flood protection. This project is currently in Phase II.
Project Groups San Francisco Bay Restoration Authority (Eligible)

Project Identification

241 JV - Record Number

Habitat Plan

ActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
Enhancement Vegetation Bay Habitat (SFBJV Only) Tidal marsh 50,000 In-progress/Implementation Fully tidal
Environmental Education/Outreach/Stewardship/Access Bay Habitat (SFBJV Only) Tidal marsh < 0.1 In-progress/Implementation Mixed
Enhancement Vegetation Subtidal Habitat Soft substrate 20,000 In-progress/Implementation

Related Habitat Impacts

HabitatAcres LostType of Loss
No Data


Invasive Spartina Eradication in San Francisco Bay In-progress/Implementation 70,000


DateTypeDescriptionSite Name
1999-09-01 Project start date


Contact Marilyn Latta State Coastal Conservancy Not applicable/Unknown
Partner Anne Morkill USFWS - San Francisco Bay National Wildlife Refuge Complex Not applicable/Unknown
Contact Peggy Olofson Invasive Spartina Project Not applicable/Unknown


Funding Need: $10,000,000

Enhancement WCB Wildlife Conservation Board $10,000,000
Enhancement SCC State Coastal Conservancy $10,000,000
Enhancement CDFW California Department of Fish and Wildlife $5,200,000
Enhancement Unknown/Unspecified $4,000,000
Enhancement USFWS U.S. Fish and Wildlife Service $4,000,000
Enhancement Unknown/Unspecified Federal Funder $3,000,000
Enhancement CDFW Prop 1 - Watershed Restoration Grant Program $2,200,000

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
No Data
Upload files or links
Name File Type Submitted On Submitted By
Invasive Spartina Project Website Other 2017-05-16 Sandra Scoggin, SFBJV

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