This is not on the Bihedral but just ACROSS THE RIVER from the Bihedral. It is on the same buttress as Whodathunkit & Crack Where the Sun Don't Shine. Perhaps not of the same quality rock. Park at the pullout just W of the Bihedral/Riviera on the S side of the road. Wade/hop the river. Wander 5 minutes ESE. This ascends the R side the buttress.
Find a short, L-facing dihedral of easy difficulty. Head up. Climb a short R-facing dihedral. From here there are 2 options, straight over a little room 5.10 R or traverse R 8 feet and back L above. Then angle up and R. You could join crack where the sun don't shine finish or angle R across slabs (crux) with marginal protection until you are under a small overlap/roof. Traverse R and up and finally you are there. Hmmm. Not sure it's worth a star.
Rap 180 feet from the tree or 3rd class+ down the right side of the buttress.