WWill Alta continue to be able to literally bring out the big guns to help quell avalanches?

Interesting story from the NY Times...
But now the big-gun equation that Alta pioneered and perfected is changing. The supply of military surplus shells — many of Korean War vintage — is dwindling. Development and population growth have put more people under the flight path of aging ordnance, raising the anxieties of the Army, which monitors the program.

What do you think?  I personally would love to go out one day and watch the big guns fire in person.