PRINCE GEORGE'S COUNTY, Md. (WUSA9) -- Remember the huge water main break in Rockville back in 2008?
Who could forget the thousands of gallons of water gushing down, fittingly named, River Road?
That's when the Washington Suburban Sanitary Commission (WSSC) decided to spend millions of dollars to track weaknesses in the pipes, using fiber-optic technology.
WSSC ran wires through all the pipes to track weak areas.
They also put a sonar-type microphone in the pipes to roll through the system, listening for and tracking any cracks with sound.
WUSA9's Bruce Leshan got a chance to see the technology firsthand and filed a report in the video above.