Water customers in South Charleston reported a discoloration in their water because of a sudden change in pressure in the water tank, Jordan said.
The water level in one of the twin tanks dropped 20 feet "very rapidly" after the river crossing line break, Jordan said.
West Virginia American Water turned the valve off 20 minutes after officials learned of the break, Jordan said.
South Charleston residents should not be concerned; a boil-water advisory was not issued for them, Jordan said.
The repairs will be extensive, she said.
"This is not something that will be fixed today," Jordan said. "Generally anytime a river's crossing line is involved, you have to get divers out and inspect it first, and then to make the repair can be fairly lengthy."
The company has already contacted a diver to inspect the pipe that is under the river, she said.
"The coal company is going to be making the repair placing the section of that river crossing under the guidance of West Virginia American Water," Jordan said.
Jordan called the break "an unfortunate accident in their operations that we responded to quickly."
Reach Megan Workman at megan.work...@wvgazette.com or 304-348-5113.