66-Inch Trunk Sewer Rehabilitation

Status Planning County Napa
Project Type Compensatory mitigation Location 38.24396° N, -122.28339° W Map
Project Area (Acres) No Data Last Updated 20 May 2021
Project Abstract The Project is located on the eastern side of the Napa River between Highways 29 and 221 in southern Napa County (lat: 38.2395, long: -122.285478). The Project will rehabilitate approx 6,985 feet of 66-inch diameter trunk sewer pipeline by installing cured-in-place pipe (CIPP) liner and will require full sewer bypass pipe for duration of project.

Project Identification

IDType
1600-20-006-R3 CDFW - 1600 Series Permit
2 CW436192 SWRCB - 401 Certification Letter (e.g., Site Number or WDID)
864023 SWRCB - CIWQS Place Number

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
66-inch Sewer Rehab Habitat Mitigation Implementation Repair/Maintenance Pumps and Pipes Repair and Replacement Estuarine Wetland Marsh 0.77 Construction planned
66-inch Sewer Rehab Habitat Mitigation Implementation Repair/Maintenance Pumps and Pipes Repair and Replacement Seasonal Wetland Unknown/Unspecified < 0.1 Construction planned Unknown/Unspecified
66-inch Sewer Rehab Habitat Mitigation Implementation Restoration/Rehabilitation Vegetation Unknown/unspecified habitat None 0.78 Construction planned

Related Habitat Impacts

HabitatAcres LostType of Loss
No Data

Sites

NameStatusAcres
66-inch Sewer Rehab Habitat Mitigation Construction planned 0.78

Events

DateTypeDescriptionSite Name
2021-12-30 Phase end Complete planting of native species (approximate date) 66-inch Sewer Rehab Habitat Mitigation
2021-10-16 Phase start Begin planting of native species (approximate date) 66-inch Sewer Rehab Habitat Mitigation
2021-10-15 Groundwork end Complete construction/sewer rehabilitation work 66-inch Sewer Rehab Habitat Mitigation
2021-08-30 Phase end Complete invasive plant removal (approximate date) 66-inch Sewer Rehab Habitat Mitigation
2021-05-15 Project start date Construction start date for sewer rehabilitation
2021-05-15 Groundwork start Begin construction/sewer rehabilitation work 66-inch Sewer Rehab Habitat Mitigation
2021-04-15 Phase start Begin invasive plant removal (approximate date) 66-inch Sewer Rehab Habitat Mitigation
2021-02-03 Other Contract awarded to contractor
2020-12-23 Permit RWQCB 401 Water Quality Certification Permit acquired.
2020-07-02 Permit CDFW Streambed Alteration Agreement No. 1600-2020-0006-R3 issued

People

TypeNameOrganizationDepartment
Consultant Brian Freiermuth WRA, Inc. Wildlife Biologist
Agency Staff Karl Ono Napa Sanitation District Not applicable/Unknown

Funding

PhaseActivityFunderAmount
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) 10 percent targeted
Revegetation Plan Ecosystem Protection, Restoration, and Enhancement Percent survivorship of shrubs (Year 2) 20 percent targeted
Revegetation Plan Ecosystem Protection, Restoration, and Enhancement Percent survivorship of shrubs (Year 3) 30 percent targeted
Revegetation Plan Ecosystem Protection, Restoration, and Enhancement Percent survivorship of shrubs (Year 4) 50 percent targeted
Revegetation Plan Ecosystem Protection, Restoration, and Enhancement Percent survivorship of shrubs (Year 5) 50 percent targeted
Name File Type Submitted On Submitted By
401 Water Quality Certification Plan Or Permit 2021-01-24 Xavier Fernandez, San Francisco Bay Regional Water Quality Control Board
Habitat and Mitigation Monitoring Plan Plan Or Permit 2021-01-05 Xavier Fernandez, San Francisco Bay 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