Petersen Ranch: Working Waterway Habitat Enhancement Project

Status In-progress County Solano
Project Type Non-mitigation Location 38.25203° N, -121.73743° W Map
Project Area (Acres) No Data Last Updated 11 January 2022
Project Abstract This working waterways habitat enhancement project will pair cattle management practices with ecosystem restoration practices to create 13.5 acres of riparian habitat on actively farmed and grazed ground in the northern part of the Petersen Ranch along Lindsey Slough.
Project Groups SSJDC Prop 1
Administrative Region Sacramento-San Joaquin Delta and Suisun Marsh (Prop 1) - Rachel Wigginton, SSJDC

Project Identification

Prop 1-1605 SSJDC - Prop 1 Grant ID

Habitat Plan

Site NamePhaseActivitySubActivitiesHabitatSubHabitatAcresActivity StatusWater Regime
Working waterways Restoration Plantings None Monitoring & Evaluation Soils Unknown/unspecified habitat None No Data Implementation in-progress Managed non-tidal

Related Habitat Impacts

Impact Project NameHabitatAcres LostType of Loss
No Data


No Data


DateTypeDescriptionSite Name
2022-09-30 Project end date
2020-04-14 Monitoring end Last CRAM date
2017-09-12 Monitoring start First CRAM date
2017-09-01 Project start date


Agency Staff Chris Carlson Solano Resource Conservation District Not applicable/Unknown


None Monitoring & Evaluation CDFW Prop 1 - Delta Water Quality and Ecosystem Restoration Grant Program $444,464

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
2020-04-14 6.1 Petersen Site 9 Post-Restoration riverine non-confined 70
2020-04-14 6.1 Petersen Site 3 Post-Restoration riverine non-confined 63
2020-04-14 6.1 Petersen Site 6 Post-Restoration riverine non-confined 62
2020-04-14 6.1 Petersen Site 5 Post-Restoration riverine non-confined 61
2018-05-29 6.1 Petersen Site 6 Pre-Restoration riverine non-confined 65
2018-05-29 6.1 Petersen Site 5 Pre-Restoration riverine non-confined 60
2017-11-08 6.1 Petersen Site 9 Pre-Restoration riverine non-confined 63
2017-09-12 6.1 Petersen Site 3 Pre-Restoration riverine non-confined 59

Performance Criteria

StatusDetailsEvaluation Date
Criteria not evaluated yet Vegetative Cover will be assessed by randomly tossed quadrats at pre-determined intervals along the 4 planted areas to be evaluated. These data will then be averaged to give a total % cover, weed % cover and native % cover for the project. Water quality will be assessed during irrigation events by taking in situ measurements of water temperature, dissolved oxygen (DO), turbidity and electrical conductivity (EC) with a hand-held sonde probe. While improvement in these measurements may be overwhelmed by influence from the greater watershed, it is anticipated that the establishment of buffer strips and removal of cattle from the waterways will show brief improvements in water quality at the project sites compared to baseline conditions. Riparian ecological condition will be assessed before project initiation and again at its conclusion by conducting CA Rapid Assessment Method (CRAM) surveys at the 4 sub-project sites. 2020-10-01
Name File Type Submitted On Submitted By
Monitoring report Monitoring Report 2021-01-27 Andrea Mummert, Solano Resource Conservation District
Photomonitoring Photo 2022-01-11 Andrea Mummert, Solano Resource Conservation District

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