The Quilceda is indeed a small stream measuring maybe 15' at its widest spots. It is a bit north of Seattle though and actually flows through the Everett, WA suburb of Marysville and from there through a portion of the Tulalip Tribe's Reservation (Steve and Karen are Tulalip tribal members). They used this fly for summer steelhead on two rather famous "S" rivers. Steve and Karen also tied it (yes tied is correct since Steve and Karen haven't tied is about 6 or 7 years according to what Steve told me, too bad because Steve was one of the best.) with a front body section of claret or burgundy dubbing.
Another side note: Steve has been building some very nice bamboo rods for the last 9 years, one of the reasons he hasn't tied a fly in the last 7 or so years.