"I've looked at hundreds of debris torrents and slides and there's really nothing that can be done other than stabilize and revegetate the slope."

borntofish, thanks for addressing my question!

Has it proven to be too expensive, or too difficult, to stabilize and revegetate? Or is it really not either, but it's more effort than someone's going to put out w/o being forced?

My visual image of an steep, rocky slope and accompanying slides doesn't look like a simple challenge.