Is information about disruptions to the US PSTN collected anywhere? The discussion of cable tapping and the NSA's apparent taste for doing things the expedient

Is information about disruptions to the US PSTN collected anywhere? The discussion of cable tapping and the NSA's apparent taste for doing things the expedient way instead of the legal way makes me wonder if the "vandalism" domestic underground fiber cuts in the years after 9/11 form an interesting pattern.