Mt Whitney Zone Forums General Discussion Mt Irvine from Consultation Lake via Arc Passs

I am not sure if this is the route that you were considering:

Quote Page 60 Third Edition The High Sierra by R.J. Secor:

Mt. Irvine

West Face. First ascent 1957 by Charles House.
Ascend the fourth chute south of Consultation Lake. Be forewarned: As a descent route, this chute is impossible to find from the summit of Mount Irvine.

At a second glance, I see that there is a Class 2-3 Arc Pass route to Irvine that departs from the eatern shore of Consultation Lake.