Tuesday December 23, 2025
USFWS —
Every year, thousands of salmon return to Leavenworth National Fish Hatchery to spawn- and die. But their story doesn’t end there. One of the most common questions we get from visitors is: What happens to the salmon carcasses after spawning? This year, our answer has changed! A new partnership with Winton MFG, a local composting organization, is aiming to mimic the role of wild salmon in nutrient enhancement using Leavenworth NFH spring Chinook.
In our agriculturally rich region of north central Washington, salmon provide powerful nutrients that support healthy soil and thriving crops. Wild salmon returning to the mid-Columbia River from the ocean bring back essential nutrients that help our forests and rivers thrive. By the time salmon are ready to spawn, they’ve used up all their energy toward reproduction, and their meat is no longer suitable for human consumption. After spawning, these fish die naturally and decompose in rivers, on streambanks, or in forests- recycling nutrients back into the ecosystem.