Success! Coho Spawning Upstream of Mill Creek Fish Passage Project

In early December, 2016, coho salmon were seen spawning upstream of the recently completed dam removal project that PCI worked on in Mill Creek near Healdsburg. Staff from the Sonoma County Water Agency and the UC Cooperative Extension/CA Sea Grant’s Coho Monitoring Program documented the fish. A PCI employee also observed a female coho building a redd (nest) immediately upstream of the site while closely attended by two male coho.

The project was completed in October, 2016, by PCI working in partnership with Trout Unlimited, NOAA, CDFW, and neighboring landowners. It restores access to 11.2 miles of prime coho and steelhead habitat upstream of the removed flashboard dam. More detailed information about the project and Mill Creek’s importance as coho habitat can be found in the “Mill Creek fish passage featured in” post below and at:

As of January 4th, 2017, the Coho Monitoring Program estimated that at least 19 adult coho had made it past the remediated dam site. Program staff have also observed eight coho redds in the upper reaches of Mill Creek, which is more than have been seen in the past eleven years combined! This is a great success in the continued efforts towards coho recovery in the Russian River.
See link for a great video of coho spawning upstream of the Mill Creek dam remediation site:

Coho salmon female and jack next to redd, upstream of Mill Creek Dam Fish Passage Project on 12/3/16. A jack is a male salmon that matures and returns one year earlier than other adult salmon to carry out spawning  and is thus smaller than other adults. Photo courtesy of The Coho Monitoring Program.