What Is Raleigh's Mysterious 'Sewer Creature'?

Colony of Worms Not Issue for Sewer System

But he also said there's no reason to clear them out unless they begin to clog the sewer pipe.

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Although some doubted the legitimacy of the video, the U.K.'s Daily Mail confirmed with Hilton Head Island, S.C.-based Malphrus Construction that the video is indeed real.

"We were asked by our client to inspect the sewer lines, which were built in 1949," a spokeswoman told The Daily Mail. "Because the sewers are so old, there were many infrastructure issues."

But she said that the colonies look much larger on camera than they actually are.