I don't know if there are any DNA samples of these fish collecting dust some where in a DFO desk or storage area ... it would be interesting to compare it to Nooksack fish. As to where they spawned there are records of fish being seen in the 4 mile jam area (main river) fairly recently, app 15 years ago.
A long deceased Soowahlie elder, Francis Kelly, told me they were quite common in the early 1900's, but I suppose all salmon stocks were back then.
These fish entered the Chilliwack River in June and spawned late September .. how does that compare to Nooksack chinook?