Found this fly while poking around the flyboxes at Kingfisher's in Missoula (nice shop, love their rolling material racks). S'posed to be a good bet on Rock Creek; turns out it was.
hook - Mustad 9671 #12
thread - Uni 8/0 camel
Tail - goose biots brown
body - Super Floss red
rib - peacock herl
hackle - Indian hen back
head - 1/8 brass bead
Mash down barb and slide bead on shank
start thread, wind to bend and create thread ball
tie in biot tails (extend a little less than shank length) tight against thread ball to divide; trim tails and create thread underbody
tie in Super Floss (original pattern called for regular floss but it tends to darken up too much for my liking when coated in cement; Uni-Stretch is better and easy to work with but I wanted to see how the spandex stuff would work)
tie in peacock herl
wrap Super Floss, try to create tapered body
coat with Sally
spiral peacock up body while cement is still wet (to tell the truth, counter wrapping with x-small copper wire would probably create a more durable fly; next time)
prep a hen back feather; couple wraps of hackle (keeping it sparse), tie off, a bit more Sally and you're done
top view (kinda)
If it's going to be fished (and lost) amongst the rocks, I like to keep them simple. Originally tied by Darryl Smoot for the Yakima River.
Regards,
Scott