Coyote Ridge Lower Road Culvert Replacement Project

Status Planning County Santa Clara
Project Type Repair/Maintenance Location Not Mapped
Project Area (Acres) No Data Last Updated 20 May 2021
Project Abstract Project will improve fire road conditions at two creek crossing on Coyote Ridge Open Space Preserve by improving flow conveyance at the culverts under the road. The project will remove and replace degraded culverts a the two road crossings at unnamed tributaries to Coyote Creek, identified as Drainages A and B in project document.
Project Groups SCVWD: Stream Maintenance Program
Administrative Region San Francisco Bay Regional Water Quality Control Board - Xavier Fernandez, SFBRWQCB

Project Identification

2 CW435592 SWRCB - 401 Certification Letter (e.g., Site Number or WDID)
862935 SWRCB - CIWQS Place Number

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
No Data

Related Habitat Impacts

Impact Project NameHabitatAcres LostType of Loss
No Data


Coyote Ridge Lower Road Culvert Construction planned No Data


DateTypeDescriptionSite Name
2020-08-03 Groundwork start Pre-construction survey, mobilization of construction equipment, and start of excavation
2020-07-31 Project start date Pre-activity survey conducted and trimming of vegetation around work areas.
2020-07-28 Permit USACE Regional General Permit (RGP) 18 - Santa Clara Valley Habitat Plan Regional General Permit. File Number 2020-00082S
2020-07-24 Permit Clean Water Act Secton 401 Water Quality Certification and Order for the Coyote Ridge Lower Road Culvert Replacement Project, Santa Clara County. WDID# 2 CW 435592
2020-06-23 Permit Final Streambed Alteration Agreement, Notification No. 1600-2019-0404-R3, Coyote Ridge Lower Road Culvert Replacement Project.


Agency Staff Gerry Haas Santa Clara Valley Habitat Agency Not applicable/Unknown


Funding Need: $1,949

No Data

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
No Data

Performance Measures

Plan NamePlan GoalPerformance MeasureMeasure ValueStatusEvaluation Date
Revegetation Plan Ecosystem Protection, Restoration, and Enhancement Percent survivorship of shrubs (Year 1) 20 count
Name File Type Submitted On Submitted By
1600_2019-0404 Final Agreement Plan Or Permit 2020-08-05 Cristina Grosso, San Francisco Estuary Institute
862935 SantaClaraCo_R2_401_SantaClaraHA_LowerCoyoteCulvertsReplacement Plan Or Permit 2020-08-05 Cristina Grosso, San Francisco Estuary Institute
Coyote Ridge Stream Upgrade Plans 100% rev (072020) Plan Or Permit 2020-08-05 Cristina Grosso, San Francisco Estuary Institute
SPN-2020-00082_RGP Authorization Plan Or Permit 2020-08-05 Cristina Grosso, San Francisco Estuary Institute

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