We’ve noticed numerous paleosinkholes over Missouri in the middle of similar rock cuts that now sit at ~30 degrees and are heavily vegetated. If excavation could be done cheap, cut it back to <30 degrees and vegetate it
As we went through this exercise—even at the very end—we continued to discover alternatives
There are numerous simple retaining wall structures that might work just fine if all we want to do is control rock, ravel, and roll.
Sheet piles, bin walls, etc.
The next road cut down from Site E has a degraded paleosinkhole…