Wildlife Corridors for Flood Escape on the Yolo Bypass Wildlife Area

Status Proposed County Yolo
Project Type Non-mitigation Location 38.56312° N, -121.63543° W Map
Project Area (Acres) 23.00 Last Updated 7 March 2018
Project Abstract The project creates five miles/22 acres of new habitat in the YBWA with the primary goals to: 1) Address wildlife flood-safety problems and enhance year round habitat; 2) Use regional partnerships to implement a pilot restoration program to provide educational opportunities and create public connections to habitat restoration in the Delta.
Project Groups SSJDC Prop 1

Project Identification

Prop 1-Yr1-2015-016 SSJDC - Prop 1 Grant ID

Habitat Plan

ActivityHabitatSubHabitatAcresActivity StatusWater Regime
Demonstration Seasonal Wetland Floodplain 0.60 Permitting
Restoration Seasonal Wetland Grassland and associated wetland 3.00 Permitting Unknown/Unspecified
Restoration Upland Grassland 20.00 Permitting Unknown/Unspecified

Related Habitat Impacts

HabitatAcres LostType of Loss
No Data


YBWA-Demonstration Planting Area Proposed 0.60
YBWA-Wildlife Corridor North Proposed 20.00
YBWA-Wildlife Corridor South Proposed 3.00


DateTypeDescriptionSite Name
2017-11-14 Inspection Site Inspection by Delta Conservancy including project tour.
2017-11-13 Other Understory seeding of native grass/forb mix was implemented. Of the total 22 acres planned for the project 11 acres were seeded this year in an adaptive management plan that considers a possible flood event this year following the prolonged extreme flood events of 2016. Species were drill seeded using a TruAx drill seeder.
2017-06-30 Groundwork start Groundwork start-managing invasive weeds with herbicide application, mowing understory areas that will be planted in Fall 2017
2017-06-27 Other Environmental Stewardship event with Putah Creek Council- One Creek Interns will assist with taking California Native Rose (Rosa californica) cuttings near to the project site. Participants will be introduced to the bypass history and importance of flood management and wildlife conservation on working lands. Youth will learn horticultural principles of propagating native plants and cuttings will be used for stock material in project implementation activities.
2017-06-14 Monitoring start Baseline monitoring began (Point Blue Conservation Science biologist)
2017-06-01 Other A total of 4 game cameras were deployed on the proposed project site using random placement strategy. 2 are located on the north corridor, 2 are located on the south corridor. Camera traps will be used to monitor mammal communities on the Yolo Bypass Wildlife Area before groundwork begins.


Partner Martha Ozonoff Yolo Basin Foundation Not applicable/Unknown
Partner Corey Shake Point Blue Conservation Science Not applicable/Unknown
Agency Staff Joanne Heraty Yolo County Resource Conservation District Not applicable/Unknown
Agency Staff Heather Nichols Yolo County Resource Conservation District Not applicable/Unknown
Agency Staff Jeanette Wrysinski Yolo County Resource Conservation District Not applicable/Unknown
Agency Staff Jeffrey Stoddard California Department of Fish and Wildlife Not applicable/Unknown


No Data

Related CRAM Assessments

Visit DateVersionSite NameWetland TypeIndex Score
No Data

Performance Criteria

StatusDetailsEvaluation Date
Project not underway Increased use of floodway-escape corridor area by wildlife during flood events 2017-03-14
Project not underway Increased abundance and diversity of wildlife and pollinators throughout the year 2017-03-14
Project not underway Use strong partnerships during the contract period to implement restoration and educate and connect the public to restoration in the Delta 2017-03-14
Project not underway 22 acres of year-round habitat and 0.5-acre of publicly accessible demonstration planting established 2017-03-04
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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