
River Riffle Newsletter – April
Contents
- Current Conditions: B120 Water Year Determination is “Wet”, download the Flow Notice
- Program Updates: Spring Quarterly TMC Meeting, Public Comment Period Open for Watershed EA
- Featured Article: Fish Biologists Turned Farmers – Growing Food for Juvenile Salmonids in a Regulated River System
- Trinity River Watershed Spotlight: Common Horsetail, Equisetum Arvense
- Upcoming Meetings and Events
- Reading, Listening & Watching
Current Conditions
Water Year 2025 – California Department of Water Resources B120 = “Wet”

The California Department of Water Resources 50% Exceedance Forecast B120 declaration was published on Apr. 9 as “wet” with the determination of inflow at 1,850,000 acre feet.
The hydrograph developed by the Program with the “wet” water allocation for the Spring Snow Melt Peak and Recession period will commence on Apr. 15. Click the button below to view the schedule.
The schedule is finalized with a change order released by Central Valley Operations. If you would like to receive those emails please follow this link:
Program Update

Summary of the Trinity Management Council’s March Quarterly Meeting
The Trinity Management Council met virtually on Wed., March 19, 9am-3pm for its spring-quarter meeting. There were seven major topics on the agenda along with two decision items.
- Program Updates (TRRP Staff)
- Central Valley Operations Update (Elizabeth Hadley, Reclamation)
- Post-TAMWG public outreach options (Ty Wallin, US Fish and Wildlife)
- Communications Workgroup Charter (Kiana Abel, TRRP) – Decision Item
- Hatchery Technical Team Update (Chris Laskodi, Yurok Tribe)
- TRD Re-Consultation Update (Kristin Hiatt, Reclamation)
- Spring hydrograph decision (Patrick Flynn, Trinity County) – Decision Item

Trinity River Watershed Restoration Project Environmental Assessment
Public Comment Period: Mar. 28 – May 1
Trinity River Restoration Program, U.S. Bureau of Land Management-Redding Field Office and U.S. Forest Service, Shasta-Trinity National Forest, officially announce the availability of a draft Environmental Assessment for the proposed Trinity River Watershed Restoration Project. Please click below to access the EA, learn more about the project, and how to provide comment.
Featured Article

Fish Biologists Turned Farmers – Growing Food for Juvenile Salmonids in a Regulated River System
Uncover the intricate dynamics of salmon restoration in the Trinity River, where modern river science grapples with the complex interplay of habitat degradation, climate change, and ecosystem health. Despite significant strides in increasing juvenile Chinook Salmon populations, the challenge remains to boost adult returns as they face numerous survival hurdles. This article delves into the vital roles of algae and benthic macroinvertebrates, essential food sources for young salmonids, alongside the impacts of scouring floods and inundation on their growth. Explore how innovative restoration strategies are reshaping river habitats to support these keystone species and enhance aquatic ecosystems!
Trinity River Watershed Spotlight

Horsetail
Equisetum Arvense, E. Hymanale, E. Laevegatum
The genus Equisetum, known as horsetail, are a commonly known group of plants that thrive in wetland ecosystems. Although quite familiar, Equisetum has much to uncover, with a history dating back 375 million years! These “living fossils” play a crucial role in riverbank stabilization and biodiversity, have multiple propagation methods, key ecological contributions, and traditional uses that have spanned cultures around the globe. Dive into the dynamic life of horsetails and uncover their importance in both nature and human history!
Photo: Equisetum found along the Trinity River. [Simone Groves, Hoopa Valley Tribal Fisheries]
Upcoming Meetings and Events
For a full list of events, click to view the TRRP Calendar.

Apr. 15 through May 15 Spring Wildflower Scavenger Hunt
Trinity County, Ca.
Our annual Spring Wildflower Scavenger Hunt checklist is here! A great way to get out and enjoy the beautiful abundance of spring and at the same time test your photography skills. If you can find 10 of the 20 you’ll win a prize of milkweed seeds, a key food source for Monarch butterflies. Plus, one lucky winner will win a gift card to Up North Confectionary (located in Weaverville).
Once finished send your completed sheet and photos of the flowers you find to dmcintosh@tcrcd.net by May 15 to receive your prize and be entered into the drawing.

Apr. 23, 6pm – Science on Tap
Trinity County Brewing Company
This month’s Science on Tap features a presentation from Chad Martel, Habitat Biologist with the Hoopa Valley Tribe, who will present: “ Redd to Blue: The Perilous Journey of Juvenile Chinook Salmon.”
Chad obtained his undergraduate and graduate degrees from Cal Poly Humboldt where he focused his studies on marine and estuarine fish. Currently, he works with the Hoopa Valley Tribal Fisheries Department as a Habitat Biologist. His focus with Hoopa has been on smaller scale restoration projects, habitat and juvenile outmigrant monitoring both on and off the reservation.

May 10, 11am – 4pm Trinity Heritage Days
Highland Art Center Meadow – Weaverville
Step back in time and experience the sights, sounds and traditions of live in 1800s Trinity. Heritage Days brings our past to life; featuring live demonstrations and hands-on activities that highlight the Nor Rel Muk Wintu Nation, Gold Rush Pioneers and the Joss House Chinese Temple.

May 31, 9am – 2pm Grass Valley Creek Watershed Tour
Trinity County, Ca.
Join us for a guided exploration of restoration efforts and ongoing stewardship in the Grass Valley Creek Watershed.
Space is limited! Please RSVP to Duncan McIntosh (dmcintosh@tcrcd.net) at 530-623-6004 x222.

June 17 & 18 – All Day Quarterly TMC Meeting
Weitchpec, Ca. & Virtual
Reading, Listening, Watching
Heart of Steel (Part II) Wellspring of a species: A steelhead origin story | Wild Salmon Center
By Ramona DeNies

Dive into the depths of three west coat rivers, where a remarkable yet elusive fish known as the steelhead half-pounder lurks, bright silver and packed with secrets. A half-pounder embodies the biodiversity and resilience of its species and is unique in that they return to freshwater after merely three to five months at sea. As experts unravel the complex lives of these remarkable creatures, they reveal the profound impacts on their survival.
Join fisheries scientists and dedicated conservationists in a journey through the challenges and hopes for the future of steelhead, and discover why these incredible fish are worthy of our fascination. Continue Reading …
2024 Fall Salmon Redd Survey Results Reinvigorate Commitment to Instream Habitat Restoration | Watershed Research and Training Center
Jan. 10, 2025
As salmon numbers dwindle to historic lows, learn about the innovative restoration efforts aimed at reviving their populations and the importance of preserving their cultural significance. Click to delve deeper into the world of salmon and the collaborative efforts that could make a difference in their survival!
King County Scientists identify a potential breakthrough for treating salmon-killing tire chemical | King County Natural Resources and Parks
March 27, 2025
Research by King County scientists on how to reduce the toxicity of storm water runoff is showing promising results and could offer new solutions to the longstanding problem of Coho salmon dying from exposure to pollution before they can spawn.
Contact Us
Call Us: 530-623-1800 Email Us: info@trrp.net