Thank you very much for the update. Last time I hiked into Singing Pass that way was in 1972. Have done the Musical Bumps hike a few times 2005 - 2009.
It's been two years. But my wife and I backpacked over the musical bumps into Russet lake. We took the singing pass trail on the way out. The lower part of the trail had a couple of big washouts. One actually had a rope strung to the side of the trail to aid in the descent. However at that time they we building or re routing the trail just above the washout to bypass it.
Should be heading up there sometime this week for another backpack. I will give you an update.