At half-past noon on Jan. 9, cable TV contractors sinking a half-mile of cable near Interstate 10 in rural Arizona pulled up something unexpected in the bucket of their backhoe: an unmarked fiber-optic cable. “It started pulling the fiber out of the pipe,” says Scott Johansson, project manager for JK Communications and Construction. “Obviously, we said, ‘Oop, we’ve hit something.’”
As the fiber came spooling out of the desert soil like a fishing line, long-distance service for millions of Sprint PCS and Nextel wireless customers west of the Rockies blinked off. Transcontinental internet traffic routed over Sprint slowed to a crawl, and some corporations that relied on the carrier to link office networks found themselves electronically isolated.
In the end, a hole dug out of a dirt road outside a town called Buckeye triggered a three-and-a-half hour outage with national impact. It wasn’t even a very deep hole. “We ran into their line right away,” says Johansson.
Experts say last week’s Sprint outage is a reminder that with all the attention paid to computer viruses and the latest Windows security holes, the most vulnerable threads in America’s critical infrastructures lie literally beneath our feet.
“No one wants something like this to happen,” says Sprint spokesman John Taylor. “The fact is we are absolutely focused on restoring service to our customers … and in this case we did so in record time.”
A study issued last month by the Common Ground Alliance, or CGA — an industry group comprised of utilities and construction companies — calculated that there were more than 675,000 excavation accidents in 2004 in which underground cables or pipelines were damaged. And an October report from the Alliance for Telecommunications Industry Solutions found that cable dig-ups were the single most common cause of telecom outages over a 12-year period ending in 2004, with the number of incidents dropping in recent years but the severity and duration of the outages increasing.