Redd Distribution and Abundance

The mainstem Trinity River is surveyed to recover salmonid carcasses, and to count and map Chinook salmon redds. The distribution of Chinook salmon redds is expected to change in response to rehabilitation efforts of the Program, and the relative run size of natural versus Trinity River Hatchery origin fish.

The USFWS posts regular updates on redd activity through the spawning season. Please visit http://www.fws.gov/arcata/fisheries/projectUpdates.html#SpawningSurveyData.
Redd Distribution in 2009

Redd locations by dates for Chinook salmon observed during the
2009 mainstem Trinity River spawning surveys.