Trinity River Restoration Program (TRRP): Home Page (original) (raw)

“to restore and maintain the Trinity River’s anadromous fishery resources … [by] … rehabilitating the river itself”
– U.S. Department of Interior, Record of Decision, 2000

Click here for full purpose and goal statements...

PROGRAM PURPOSE
The purpose of this Program is to mitigate impacts of the Trinity River Division of the Central Valley Project on anadromous fish populations in the Trinity River by successfully implementing the 2000 Trinity River Record of Decision and achieving Congressionally mandated restoration goals.

PROGRAM GOAL
The long-term goals of the Program are to: 1) restore the form and function of the Trinity River; 2) restore and sustain natural production of anadromous fish populations in the Trinity River to pre-dam levels; and 3) to facilitate full participation by dependent tribal, commercial, and sport fisheries through enhanced harvest opportunities.

This short video highlights the history of the Trinity River and outlines the basis for river restoration following water diversions and centuries of harmful impacts from mining and logging.

WELCOME

TRRP is a multi-agency program with eight Partners forming the Trinity Management Council (TMC), plus numerous other collaborators.

The TRRP implements the 2000 Department of Interior (DOI) Record of Decision, which directs DOI to restore the fisheries of the Trinity River impacted by dam construction and related diversions of the Trinity River Division (TRD) of the Central Valley Project. Water diversions of the TRD compounded impacts to the river that occurred from gold mining and historic logging.

The main Program office is located in Weaverville, CA (contact), with staff working in the Program across various Partner offices.

The Trinity River was designated a Wild and Scenic River in 1981.

• Flow Management for Water Year 2025
  Current Conditions
  Apr. 15 - Aug. 17 2025 Flow Schedule

Current Topics:

• Link to CNRFC River Forecast (Trinity River above North Fork).
• CNRFC Forecast Inflow to Trinity Lake
• The CNRFC forecast for the Trinity River above the North Fork confluence on December 20 triggered a synchronization pulse flow peaking on December 25th.
• The Feburary B-120 forecast of inflows to Trinity Lake indicated a "Normal" year at the conservative 90% level, assigning 60,000 acre-feet of additional water for February 15 - April 14.
• The March B-120 forecast of inflows to Trinity Lake indicated a "Wet" year at the conservative 90% level, assigning an additional 60,000 acre-feet of water for March 15 - April 14.