I received a written response from the Forest Supervisor. I thought it was a good letter. Mike's accident (and others in the same area) was reviewed by NFS and Inyo SAR. At the Supervisor's request, the site was visited by the NFS trail coordinator and Whitney wilderness ranger; while there, they added more rocks to the berm. The letter further indicates staff will revisit the site soon after the snow melts to "determine if there is something that could reasonably be done to reduce confusion along this section of the trail."
I want to thank everyone who has contributed to this thread.