Atascadero Creek Sedimentation Analysis and Fish Passage Restoration 65% Design Project

Status Planning County Sonoma
Project Type Non-mitigation Location 38.44730° N, -122.88353° W Map
Project Area (Acres) No Data Last Updated 20 May 2021
Project Abstract To study the conditions of the lower Atascadero Creek marsh and develop 65% Design Plans for the removal of the accumulated sediment to improve water quality and enhance aquatic habitat for migrating salmoinds and other wetland riparain species.
Project Groups CDFW Prop 1
Administrative Region California Department of Fish and Wildlife - Hildie Spautz, CDFW

Project Identification

Q2096007 CDFW - Prop 1 Grant ID

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
Lower Atascadero Creek sediment accumulation area None Monitoring & Evaluation Geomorphology, Water quality, Wildlife-specific Measures Riverine Wetland Channel 0.87 Planning in-progress Perennial non-tidal

Related Habitat Impacts

Impact Project NameHabitatAcres LostType of Loss
No Data


No Data


DateTypeDescriptionSite Name
2024-03-15 Completion Project completed
2023-12-31 Project submitted 65% Design Plans submitted
2023-12-31 Report All reports (Historical Ecology, Coho Monitoring, Water Quality, Wetland Habitat Assessment, Sediment Toxicity & Analysis, 65% Intermediate Designs Plans and Basis of Design Report will be completed Lower Atascadero Creek sediment accumulation area
2020-10-01 Habitat survey Habitat and water quality survey will begin and culminate in a summary report in August 2022
2020-10-01 Monitoring start Draft monitoring plans will be submitted by 9/30/2020 and monitoring will begin once they are approved by the Technical Workgroup. Lower Atascadero Creek sediment accumulation area
2020-10-01 Monitoring start Draft monitoring plans will be submitted on 9/30/2020 to be approved by TWG in November 2020
2020-07-20 Project start date Contract start date


Contact Sierra Cantor Gold Ridge Resource Conservation District Not applicable/Unknown


Funding Need: $551,220

None Monitoring & Evaluation CDFW Prop 1 - Watershed Restoration Grant Program $551,220

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
No Data
Name File Type Submitted On Submitted By
Atascadero Creek Sedimentation Analysis and Fish Passage Improvement 65% Design Project Site-scale Map Other 2020-08-27 Hildie Spautz, California Department of Fish and Wildlife

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