Old Haul Road: Dark Gulch Creek Crossing Stabilization Project

Status Planning County San Mateo
Project Type Repair/Maintenance Location 37.26605° N, -122.26020° W Map
Project Area (Acres) No Data Last Updated 27 March 2023
Project Abstract The project reduces chronic and episodic sediment delivery to Pescadero Cr in San Mateo County by upgrading and stabilizing a large, failing stream crossing on Old Haul Road. It also reestablishes safe road access for administrative and emergency purposes for County Parks and CALFIRE, and eliminates risks of catastrophic failure of the crossing.
Administrative Region San Francisco Bay Regional Water Quality Control Board - Xavier Fernandez, SFBRWQCB

Project Identification

857175 SWRCB - CIWQS Place Number

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
Old Haul Road: Dark Gulch Crossing Implementation Repair/Maintenance Riverine Wetland Riparian area 1.90 Completed Riparian

Related Habitat Impacts

HabitatAcres LostType of Loss
No Data


No Data


DateTypeDescriptionSite Name
2020-10-30 Groundwork end Dark Gulch project complete.
2020-08-17 Disaster event CZU Fire: Paused Dark Gulch project work for 2 weeks. Construction crew assisting CALFIRE and other responders to hold the north line of the fire at Old Haul Road and do emergency repairs on the road as needed to enable fire response. Note that to enable vehicle travel along Old Haul Road beyond the Dark Gulch crossing construction site, the construction crew had to create an access road through the project site which had was excavated down 100' at the time, and connect this to the fire road near the down stream end of the site. Creating this access required filling in a part of the open trench with the just-installed culvert so that vehicles could drive over it.
2020-05-11 Groundwork start Dark Gulch project allowed to proceed with approved COVID-19 safety plan in place.
2020-05-11 Project start date


Agency Staff Kellyx Nelson San Mateo Resource Conservation District Not applicable/Unknown


Implementation Repair/Maintenance State Water Resources Control Board $800,000

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
No Data

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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