Trinity River Restoration Program June Newsletter - The River Riffle
Abel, Kiana
River Riffle Newsletter – June (read online)
Contents
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Current Conditions: Fish Health, Flow and Temperature
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Program Updates: New TRRP.net webpages and features
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Featured Article: Bats of the Trinity River
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Trinity River Watershed Spotlight: An Introduction to Grasses
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Upcoming Meetings and Events: TMC Summer Quarterly Meeting, Trinity River Clean-Up
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Reading, Listening, Watching
Current Conditions
The KFHAT map presents the readiness level for the Klamath Basin below Iron Gate Dam in a visual format. Click here to read the 2025 reports.
Beginning in late April, members of the Klamath Fish Health Assessment Team (KFHAT) have held monthly meetings to assess Klamath Basin Fish Health. The KFHAT is a technical workgroup that formed in 2003 with the purpose of providing early warning and a coordinated response effort to avoid, or at least address, a non-hazardous materials related fish kill event in the anadromous portion of the Klamath River basin.
Temperature
Keep tabs on Trinity River temperatures by following the USGS gauge links below.
Flow
Through the remainder of June, flows decrease slowly until July 8 when the first of two peak flow event increases commence. Peak flow will reach 1000 cubic feet per second from Lewiston Dam on Friday, July 11 and hold through Monday, July 14. A decrease of 50 cubic feet per second is scheduled until the second and final increase to 1500 cubic feet per second takes place Saturday, Aug. 2 through Sunday Aug. 3.
Current river flow gauge readings can be found on our homepage, click here and scroll to the middle of the page.
Monitoring & Fish Health
Crews from the California Department of Fish and Wildlife are scheduled to install the Junction City Weir during the week of June 23. The weir is located upstream of the Evans Bar boat launch in Junction City and performs trapping, counting and fish health assessments of Trinity River salmonids.
National Park Service, U.S. Forest Service, and U.S. Bureau of Reclamation are implementing a self-certification process to ensure personal vessels are golden mussel free prior to launching on Shasta, Whiskeytown, Trinity, and Lewiston Lakes.
The self-certification form can be found here:
WSTNRA-Mussel-Free-Self-Certification_version-5-22-2025.pdf
Program Update
Go back in time (as far as 1944!) and swipe to compare aerial imagery within the 40-mile Trinity River Restoration Reach (compare with as recent as 2024).
Our catalogue of articles on Trinity River watershed plants and wildlife is growing and can now be found in one place! Click the button below to view and read about each species. Check it out!
Featured Articles
Featured Article
Did you know the Trinity River watershed is home to upwards of eighteen bat species? From the insect-hunting Yuma myotis to the impressive hoary bat that migrates over 2,000 km, these nocturnal mammals play a vital role in our local ecosystem. Discover how these bats thrive in their unique habitats and their incredible adaptations for foraging over water! Learn more about their importance and how you can coexist with these amazing creatures by clicking below. Continue Reading
Trinity River Watershed Spotlight
As California transitions into warmer days, the hillsides transform into shimmering gold, showcasing not just the iconic California golden poppy but also an intricate tapestry of native grasses. In our latest feature, we explore the vital role these grasses play in local ecosystems and the delicate balance of their growth cycles. Learn how farmers and ranchers cultivate relationships with these plants, recognizing the importance of timing in hay production and understanding the unique characteristics of both native and non-native species. Click below to read more! Continue Reading ...
Upcoming Meetings and Events
June 17 & 18 – All Day Quarterly TMC Meeting
Meeting ID: 219 880 031 826
Passcode: Yo2c67yg
July 19, 9am - 12pm – Trinity River Clean-Up
Lewiston, Ca. – Douglas City, Ca.
Join us for the 2025 Trinity River Clean-Up! Bring a flotation devise and help to grab trash along the Trinity River from Old Bridge in Lewiston to Douglas City. Contact the Trinity County RCD: Annyssa Interrante at 530-623-6004 x 209 for more details. Event Details ...
Reading, Listening, Watching
California’s Yurok Tribe gets back ancestral lands that were taken over 120 years ago | Associated Press
Click the link or the photo to view this catchy tune with a message regarding invasive golden mussels recorded in Whiskeytown National Recreation Area as part of an Artist-in-Residence program | Musician Nathan Frederic
By removing invasive bullfrogs, scientists help Yosemite’s native turtles recover | National Public Radio
Jun. 10, 2025 | By Ari Daniel