“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

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.

  • The Trinity River Restoration Program office in Weaverville is temporarily closed to visitors to help slow the spread of COVID-19 (coronavirus). If you would like to reach office staff or schedule a meeting please contact us at (530) 623-1800 or email info@trrp.net.

    For general Program information please see our document and data library page (https://www.trrp.net/library/). 

    During this time, all TRRP technical Work Group, Trinity Management Council and other public meetings will be held virtually. For a list of upcoming TRRP meetings please visit our calendar page (https://www.trrp.net/calendar/). Meeting details and login information can be found on the agenda document for each meeting.  

    If you are unable to find what you are looking for on our website, please send us an email or call our office. 

  • As part of channel rehabilitation activities to restore fishery habitat, the Bureau of Reclamation and Bureau of Land Management (co-lead federal agencies) and the North Coast Regional Water Quality Control Board (state lead agency), announce the availability of a draft Environmental Assessment/Initial Study for the proposed Oregon Gulch channel rehabilitation project.
    The draft environmental document that formally analyzes the impacts of this proposed project, and which meets California Environmental Quality Act (CEQA) and National Environmental Policy Act (NEPA) requirements is available for public review starting January 15, 2021 at https://www.trrp.net/library/document/?id=2479

    The public comment period will extend 30 days from the date of posting though February 18, 2021.

    Comments can be submitted to Brandt Gutermuth at fgutermuth@usbr.gov. For further information or to request a copy of the document, please contact Brandt Gutermuth at fgutermuth@usbr.gov or 530-623-1806. Visit https://www.trrp.net/restoration/channel-rehab/sites/oregon-gulch-channel-rehabilitation-page/ for more information about the project.  

Restoration Achievements and Monitoring:

General:

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.

Proportion graph
(pie chart)
moved to
Flow Volume Summary.

Parameter
Linked to TRRP data viewer
Location
Linked to TRRP online map
Time
Measured
Value
Linked to Source Website
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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.

RESOURCES FOR THE TRINITY RIVER


Trinity River Restoration

Fish of the Trinity River

Trinity River Ecology FAQ

What is the TRD?

Record of Decision (ROD) and Legislative History