Updated 10/27: Neighborhood Stormwater Threatens Sammamish River Salmon.

 In response to this post the City posted this advisory on their website front page.

Redmond's pollution truck advertises their pollution hot line:  425-556-2868 
photo by Yoder

We live two houses up from the intersection of NE 100th Street and 169th Ave. NE.  City public works had two trucks there working on a major drain to "clear up stormwater pollution."  Comcast is planning a downhill dig into 169th Ave. to install new cable that's eroded.  Comcast must have notified the city of a possible pollution problem since there was no "salmon sticker" near the drain.  A sewer line parallels the stormwater pipe making things more complicated.   

Copper residue from vehicular tires and/or fertilizers, car-washing soaps, and lawn mower oils may all have contributed to the pollution.  My guess is the stormwater pollution may have been caused by corrosion from Comcast's aging cable, tire contaminants, a sewer line leak or all three. This particular drain is in a prime location for stormwater run-off; collecting stormwater from two long residential roads. One could say the subject drain services a mini-stormwater watershed. 

  Fortunately, there are two nearby "wet-vaults" just downhill from the subject drain. Vaults treat the stormwater before it eventually enters the Sammamish River where salmon are migrating.  The supervisor said the vaults were fully operational containing only 20% sediment and didn't need to be vacuumed.  While Public Works was there they cleaned out a drain above the house from ours.   

If you have concerns about possible pollution in your neighborhood call the city hotline at 425-556-2868.  I asked the city and two city councilmembers for a "salmon sticker" for this drain and they didn't respond.  

-- Bob Yoder, Updated: 10/27/24