Record of Decision (ROD)

The Program was created by the Record of Decision (ROD) in 2000, which outlines the plan for restoration of the Trinity River and its fish and wildlife populations. It was the result of nearly 20 years of studies of the Trinity River and its fishery resources that culminated in the Trinity River Flow Evaluation Final Report (Flow Study). The Trinity River Mainstem Fishery Restoration Environmental Impact Statement/Environmental Impact Report (Trinity EIS/EIR), completed in 2000, was the NEPA/CEQA (National Environmental Policy Act of 1969; California Environmental Quality Act of 1970) document upon which the ROD was based.
The Program’s restoration strategy includes the following elements:

  1. Flow Management – a variable flow regime based on five (5) water year types to mimic more natural flows;
  2. Mechanical Channel Rehabilitation – treatment of 47 sites along the Trinity River to reshape the current channel form to establish physical processes that will create and maintain fish habitat;
  3. Sediment Management – augmentation of spawning gravels below Lewiston Dam and reduction in fine sediments which degrade fish habitats;
  4. Watershed Restoration – a program to reduce fine sediment input to the Trinity River;
  5. Infrastructure Improvements – modification of structures in the floodplain to allow peak flows;
  6. Adaptive Environmental Assessment and Monitoring – a rigorous program to monitor and improve restoration activities;
  7. Environmental Compliance and Mitigation – measures to minimize or eliminate short-term impacts.

This strategy does not strive to recreate pre-dam conditions; rather, the goal is to create a dynamic alluvial channel exhibiting all the characteristics of the pre-dam river, but at a smaller scale.