The river flow is at 500cfs. 5x- 6x fluorocarbon tippet is best. Fishing slower moving water off of fast water is holding the most fish.
For nymph fishing a brown, tan and olive midges size 22-24, Copper john size 20 and pheasant tails size 20-22, Grey foam back emergers in size 20-22. Fish your midges hovering above the bottom around 6 to 12 inches you do want to be on the bottom when using midges.
For dry fly fishing size 18-20 black ants, and size 24 parachute Adams, size 10 hoppers once the sun starts to go down.
For streamer fishing a White and olive, chartreuse and white, and tan and olive zig jig, and a black woolly bugger in all sizes