I deal with spills every day at work in the neighbouring city to Burnaby !  Hopefully their Env Dept is able to positively trace this source to owner and throw huge fines at them and have that go to re establishing this stream !  Fish kills are not common in most spills so they get A LOT OF MEDIA ATTENTION .  It’s a frustrating job when u can’t find a source and you have upside down fingerlings, urban creeks really have it bad

Excellent point, one I had not considered.  Not sure if the European strain of PVR causing all the fuss would be considered endemic yet but certainly there would be some form of immunity, thus the zero known mortalities?

PRV is endemic now that's my point it doesn't matter, remove the farms the PRV is still here

Yes it matters. Contrary to what the Salmon farming industry says there is evidence that PRV transmission from farmed to wild salmon may be harmful particularly among chinook; "PRV has been associated with a different disease in Chinook salmon in which blood cells rupture, leading to kidney and liver damage".

"Both our genomic and epidemiological methods independently came to the same conclusion, that salmon farms act as a source and amplifier of PRV transmission," said Dr. Gideon Mordecai, a viral ecologist and Liber Ero fellow with UBC Science and researcher with UBC Medicine, who led the study. "Because separate lines of independent evidence all point to the same answer, we're confident in our finding."

Sequencing of 86 PRV genomes helped researchers track the history of PRV emergence in British Columbia. They estimate that the lineage of PRV in the North East Pacific diverged from PRV in the Atlantic Ocean approximately 30 years ago. This suggests that the introduction of PRV to B.C. and infection of wild Pacific salmon is a relatively recent phenomenon, coincident with the growth of salmon aquaculture in the province -- not dating back to early attempts to introduce Atlantic salmon to the region, starting in 1874.
...

Our finding that PRV is transmitted between farmed and wild salmon is particularly relevant given recent field and laboratory studies showing the lineage of PRV in B.C. is likely to cause disease in both Pacific and Atlantic salmon" says Dr. Mordecai. A recent Norwegian study found that a Canadian isolate of the virus causes heart lesions in Atlantic salmon. More importantly to the Pacific ecosystem, PRV has been associated with a different disease in Chinook salmon in which blood cells rupture, leading to kidney and liver damage. These are in contrast to the DFO's assessment that PRV is not a disease agent.

PRV is reported from Norway,Denmark, Ireland, Chile, Japan and the Pacific Northwest (WA, AK, BC, Canada) infecting Atlantic salmon, Pacific
salmon and trout (cutthroat, steelhead,sea-run brown). In Alaska, PRV was sequenced from three stocks of coho and one stock of Chinook and unconfirmed
in one stock of chum salmon

do you have any pictures?