When we look at pictures of the scene, we see that the challenge of getting the work done is very obvious, but we also see that there are a lot of menacing cliffs sitting there. We understand this may have been a seismic event as opposed to the normal freeze and thaw, which can, of course, cause pieces of cliff to break away.
Nonetheless, has an assessment been done up and down that stretch of the river to see if there are other rockfaces that are ready to fall in?