Aramburu Island Enhancement Project - Richardson Bay - Phase 1: Pre-construction monitoring, construction

Status Completed County Marin
Project Type Non-mitigation Location 37.88914° N, -122.50001° W Map
Project Area (Acres) 2.00 Last Updated 28 September 2021
Project Abstract This project will demonstrate climate-smart shoreline stabilization techniques through the installation of a rocky/sandy beach to reduce shoreline erosion while improving upland habitat mosaic for resident and migratory birds and other wildlife.

Project Identification

621 JV - Record Number
2010/03295 NMFS - Record Number
2010072045 SCH - State Clearinghouse Number
02-21-C0798 SWRCB - 401 Certification Letter (e.g., Site Number or WDID)
756589 SWRCB - CIWQS Place Number
2009-00347N USACE - DA File Number
81420-2010-I-0899-1 USFWS - File Number

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
Aramburu Island Enhancement Project - Richardson Bay - Phase 1 None Enhancement Bay Habitat (SFBJV Only) Beach 2.00 Completed Unknown/Unspecified

Related Habitat Impacts

HabitatAcres LostType of Loss
No Data


Aramburu Island Enhancement Project - Richardson Bay - Phase 1 Completed 2.00


DateTypeDescriptionSite Name
2012-12-31 Project end date
2008-08-01 Project start date


Contact Andrea Jones Audubon California Not applicable/Unknown
Contact Rebecca Schwartz Lesberg Audubon California San Francisco Bay Program Director


Funding Need: $50,000

None Enhancement San Francisco Bay Regional Water Quality Control Board $424,551
None Enhancement Sewerage Agency of Southern Marin $200,000
None Enhancement TogetherGreen $88,000
None Enhancement National Association of Counties $85,000
None Enhancement Marin Community Foundation $70,000

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