Hopper/caddis/stonefly/meat. The original appears to have been built on a foam sandwich oriented in the horizontal plane (I guess they bisected it dorsi-ventral to achieve the split legs); tried it here in the vertical plane. Downsized here for trouts.
hook ? Dai Riki 300 #8
thread/rib - UTC 140 burnt orange
underbody - dubbing rust
body/head- 2mm foam rust
flash - Krystal Flash orange
hackle - grizzly dyed orange (1Tbs Rit Sunshine Orange/1 cup water)
Part 1
Take foam strip (gap width - probably a bit too wide; maybe 80% next time), fold in half to crease, brush Super Glue on first 1/4? or so, fold and hold until the glue sets; cut to shape, tapering underside at front and back
Mash barb, start thread, wrap to bend
Dub thread/dub underbody
Tie on body
Tie on KF
Tie on (folded) hackle by tip