Columbia, SC (WLTX) -- Work crews are still patching up a large hole blocking south bound traffic on Assembly Street.

A six inch break was discovered yesterday by workers making repairs to a nearby water main. Joey Jaco, director of utilities for the city, said that their "making good progress."

"Soon as the concrete dries that we're pouring in the hole now, tomorrow we're going to make repairs to the asphalt," he said.

He also said that although the cause for this break is unknown many factors attribute to water main breaks.

"This particular water main break was likely due to pressue fluctuations in the system and it is a pipe that is over 50 years old," Jaco said.

According to him, the city of Columbia spends six to eight million dollars on pipe rehab. So far they've fixed up pipes on Gervais, Trenholm, Main and more.

The water boil advisory is still in effect for near by neighborhoods.

"We still have to collect the necessary samples to make sure there are no issues with the water," he said. "And by tomorrow we should be able to repeal the boil water advisory."

The hole will interfere with fans attending the Blowfish game tonight. There is a detour route from Assembly St. to Dreyfuss Road. All other traffic will be detoured from Whaley St. to Olympia Ave.