CDOT - Highway 101 - Eureka-Arcata Route 101 Corridor Improvement Project

Status Planning County Humboldt
Project Type Compensatory mitigation Location 40.86807° N, -124.11324° W Map
Project Area (Acres) 70.43 Last Updated 7 January 2021
Project Abstract No Data
Project Groups Caltrans 401 Projects

Project Identification

IDType
01-0J450 Caltrans - Expenditure Authorization
01-0C930 Caltrans - Expenditure Authorization
01-0E000 Caltrans - Expenditure Authorization
01-0F220 Caltrans - Expenditure Authorization
01-0C970 Caltrans - Expenditure Authorization
01-36600 Caltrans - Expenditure Authorization
01-36601 Caltrans - Expenditure Authorization
1B190035WNHU SWRCB - 401 Certification Letter (e.g., Site Number or WDID)

Habitat Plan

ActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
Creation/Establishment Unspecified Estuarine Wetland Emergent Saline to Brackish Marsh 0.80 Construction planned Muted tidal
Enhancement Unspecified Estuarine Wetland Emergent Saline to Brackish Marsh 14.60 Construction planned Muted tidal
Enhancement Unspecified Estuarine Wetland Mudflat 4.75 Construction planned Muted tidal
Enhancement Vegetation Estuarine Wetland Emergent Saline to Brackish Marsh < 0.1 In-progress/Implementation Fully tidal
Enhancement Water Management Estuarine Wetland Emergent Saline to Brackish Marsh No Data Construction planned Muted tidal
Restoration/Re-establishment Vegetation Estuarine Wetland Emergent Saline to Brackish Marsh 0.10 Construction planned Fully tidal
Creation/Establishment Unspecified Palustrine Wetland Emergent Freshwater Marsh 30.00 Construction planned Seasonal non-tidal
Creation/Establishment Vegetation Palustrine Wetland Emergent Freshwater Marsh 0.52 Construction planned Perennial non-tidal
Creation/Establishment Vegetation Palustrine Wetland Scrub-shrub Riparian 3.70 Construction planned Seasonal non-tidal
Enhancement Unspecified Palustrine Wetland Emergent Freshwater Marsh 14.89 Construction planned Seasonal non-tidal
Enhancement Vegetation Palustrine Wetland Emergent Freshwater Marsh 0.50 In-progress/Implementation Fully tidal
Restoration/Re-establishment Vegetation Palustrine Wetland Emergent Freshwater Marsh 0.25 Construction planned Fully tidal
Restoration/Rehabilitation Vegetation Palustrine Wetland Unknown/Unspecified < 0.1 In-progress/Implementation Fully tidal
Restoration/Rehabilitation Vegetation Palustrine Wetland Emergent Freshwater Marsh 4.99 Construction planned Perennial non-tidal
Enhancement Vegetation Riverine Wetland Riparian area 0.25 In-progress/Implementation Fully tidal
Restoration/Rehabilitation Vegetation Riverine Wetland Riparian area 0.17 In-progress/Implementation Fully tidal

Related Habitat Impacts

HabitatAcres LostType of Loss
No Data

Sites

NameStatusAcres
Airport Road onsite revegetation In-progress/Implementation 1.02
Common Reed Eradication and Wetland Restoration area Construction planned 0.20
Gannon Slough Construction planned No Data
Humbodlt Bay Area Mitigation, Samoa parcel Construction planned 68.74
Indianola Cutoff shoulders Construction planned 1.58
Throughout project area Construction planned 3.21
US 101 median at Jacoby Creek Bridge Construction planned 0.35
US 101 median crossings at 3 locations Construction planned 0.52

Events

DateTypeDescriptionSite Name
2020-02-25 Other Begin planting. Airport Road onsite revegetation
2019-06-24 Project start date Estimated date

People

TypeNameOrganizationDepartment
Contact Unknown California Department of Transportation District 1
Contact Mark Allee California Department of Transportation Not applicable/Unknown

Funding

ActivityFunderAmount
No Data

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
2007-10-23 5.0.1 Jacoby Creek South estuarine perennial saline 89
2005-07-12 3.5 Jacoby Creek estuarine perennial saline 62

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 (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