Tennessee American Water Co. crews worked Friday to weld shut a steel water main that broke underground on Lookout Mountain.
Water crews set about welding the broken line Friday afternoon, and company spokeswoman Daphne Kirksey expected water to be restored to affected customers Friday night.
A hiker spotted the break Wednesday night in a forested area off Sanders Road, which connects Ochs Highway and Scenic Highway.
The company sent workers out Thursday morning to find the break, citing potential safety hazards of sending the search crew out Wednesday in the dark. Crews found the break and then had to dig to the line by hand. They found a 10- to 12-inch broken steel line.
Steel lines are typical for use along mountains, said Kirksey. "It's never really an exact science what causes a main break," she said.