CDOT - HUM, State Route 36, Three Bridges Project

Status In-progress County Humboldt
Project Type Compensatory mitigation Location 40.47401° N, -123.81942° W Map
Project Area (Acres) No Data Last Updated 3 October 2022
Project Abstract The Project would replace the Hely Creek Bridge at post mile (PM) 11.46, replace Butte Creek Bridge at PM 34.52, and widen the bridge and upgrade rails at Little Larabee Creek Bridge at PM 25.27.
Project Groups Caltrans 401 Projects
Administrative Region North Coast Regional Water Quality Control Board - Gil Falcone, Kaete King, NCRWQCB

Project Identification

IDType
0112000292 Caltrans - Enterprise Financial Infra-Structure Number
01-0C500 Caltrans - Expenditure Authorization
1B22040WNHU SWRCB - 401 Certification Letter (e.g., Site Number or WDID)

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
No Data

Related Habitat Impacts

Impact Project NameHabitatAcres LostType of Loss
CDOT - HUM, State Route 36, Three Bridges Project (impact) Unknown/unspecified wetland habitat 2.00 Lost Temporary
CDOT - HUM, State Route 36, Three Bridges Project (impact) Unknown/unspecified habitat < 0.1 Lost Permanent
CDOT - HUM, State Route 36, Three Bridges Project (impact) None < 0.1 Lost Permanent
CDOT - HUM, State Route 36, Three Bridges Project (impact) None 0.54 Lost Temporary
CDOT - HUM, State Route 36, Three Bridges Project (impact) Unknown/unspecified wetland habitat < 0.1 Lost Permanent
CDOT - HUM, State Route 36, Three Bridges Project (impact) Unknown/unspecified habitat 0.37 Lost Temporary

Sites

NameStatusAcres
Hely Creek Bridge, Little Larabee Creek Bridge, Butte Creek Bridge on SR 36 In-progress/Implementation No Data

Events

DateTypeDescriptionSite Name
2032-01-02 Project end date
2023-01-23 Project start date

People

TypeNameOrganizationDepartment
Agency Staff California Department of Transportation Not applicable/Unknown.

Funding

PhaseActivityFunderAmount
No Data

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
No Data
Name File Type Submitted On Submitted By
401 Certification Plan Or Permit 2022-06-07 Gil Falcone, North Coast Regional Water Quality Control Board

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 (ptrack.ecoatlas.org). 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