This has got to be one of the ugliest detention ponds in the area. I used to call them mosquito ponds, but I was assured that mosquitos, though they do like standing water, prefer a lesser depth and shade. Let's hope so! You can find more information regarding stormwater detention facilities in Snohomish County using this LINK.
***UPDATE***
I checked on this cache a couple days ago and found that it had been shoved into a position where it was not retrievable. Went back today with a tool to alter it's position, and could not find it at all? Odd. But I had a replacement with me so I put it back where it should have been. PLEASE be careful when replacing the cache so that it does not disappear again. And also note the reminder above about rewinding the log and putting it into the cap of the container before putting it back together. Happy Hunting!