“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 GOAL 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. 2024 Trinity River Restoration Program Science Symposium (click for details) The Trinity River was designated a Wild and Scenic River in 1981.
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.
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.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.
Restoration Achievements and Monitoring:
TRRP Annual Report for 2022: Downloadable PDF or Story Map. Alternatively, click here to view our Annual Report Library
General:
News and Media:
Trinity River Mini-Dash
Check out our DataPort “Dashboard” for more data.
Data may take some time to load. Graphs of values over time are zoomable! Click on a point on the graph and drag right to select the zoom area.
Current Flows
Most data shown here are from the USGS via the waterservices site, plus the USBR and CDWR via the California Data Exchange. Data are provisional and may be recalculated before final approval. The TRRP site checks for new sub-daily values every 15 minutes and for new daily values twice per day. Note that “Full Natural Flow” is an automated estimate from CDWR of the flow that would naturally pass the Trinity Dam site if unimpeded – it is very sensitive to small variations in lake level measurements that may result in negative values when flows would naturally be low, but is more useful for storm events, snowmelt, and averages over longer times. The graphic for water released to the Trinity River versus the Central Valley tends to show higher values for the river until summer, when water exports to the Central Valley typically increase. Click here for a summary of Trinity River flow volumes.
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RESOURCES FOR THE TRINITY RIVER