Redwood Creek Restoration at Muir Beach (Big Lagoon)

Status Completed County Marin
Project Type Non-mitigation Location Not Mapped
Project Area (Acres) 55.60 Last Updated 14 November 2018
Project Abstract The Redwood Creek Restoration at Muir Beach was a landscape-level restoration extending over 46 coastal acres owned by both NPS and the San Francisco Zen Center. The project area is at the mouth of an 8.9 square mile coastal watershed (home of Muir Woods National Monument) which is 80% publicly owned.

Project Identification

163 JV - Record Number

Habitat Plan

ActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
Restoration (unspecified) Vegetation, Water Management Bay Habitat (SFBJV Only) Lagoon 46.00 Completed Mixed
Restoration (unspecified) Sediment Management, Vegetation, Water Management, Wildlife-specific Measures Creek and Lake (SFBJV Only) Creek and riparian zone 9.60 Completed Riparian

Related Habitat Impacts

HabitatAcres LostType of Loss
No Data


Redwood Creek Restoration at Muir Beach (Big Lagoon) Completed 55.60


DateTypeDescriptionSite Name
2013-12-31 Project end date
2002-01-01 Project start date


Contact Carolyn Shoulders U.S. National Parks Service Natural Resources


Restoration (unspecified) U.S. National Parks Service $4,350,000
Restoration (unspecified) CDFW California Department of Fish and Wildlife $1,353,000
Restoration (unspecified) WCB Wildlife Conservation Board $1,260,000
Restoration (unspecified) USFWS National Coastal Wetlands Conservation Program $1,000,000
Restoration (unspecified) SCC State Coastal Conservancy $1,000,000
Restoration (unspecified) USFWS North American Wetlands Conservation Act $219,000
Restoration (unspecified) National Fish and Wildlife Foundation $48,000

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