Large School Of Chinook Spotted At Redmond Trestle Bridge

Photo by John Reinke, Redmond resident, 9/10/2021
(click to enlarge)

"Thanks (John Reinke) for sending the photos of the salmon in the Sammamish River. I saw them when I was walking on the trestle bridge as well, and I agree, it is the biggest school of salmon (mostly Chinook) that I have seen. We've saw a few in lower Bear Creek last week, and they should really move upstream with the rain later this week. 

I believe the Chinook congregate upstream of the trestle because there is a deeper channel/pool there compared to many places in the river. There may also be some groundwater flow into the river that helps to keep it slightly cooler. There are also salmon concentrating under and downstream of the 90^th Street bridge outfall because there is groundwater being pumped into the river through the outfall pipe there. The groundwater entering the river provides a cooler pocket of water for the fish to rest until moving upstream.

 

Thanks, and enjoy the fall,"

 

Tom

  

Tom Hardy (he/him) Stream & Habitat Planner, City of Redmond
425-556-2762    twhardy@redmond.gov    www.redmond.gov