A 6-inch cast-iron pipe burst in the Congress Park neighborhood on Tuesday morning, flooding parts of Colfax Avenue.
The water-main break happened at 1442 Clayton St.
Water poured east on Colfax Avenue, causing trouble for construction workers on the bus rapid transit project.
Neighbors scrambled to move cars and contended with a surprise lack of water that could last most of the day.
Cayla Cothron, who lives in a nearby house, said she was told the neighborhood would lack water for six to eight hours.
“Because it's kind of an urgent emergency, I don't think people have been notified at all,” she said. “They said six to eight hours is conservative. It should be sooner than that, but they want to be safe.”
Denver Water will provide updates as more information is available.
"Water has been shut off on site so no longer flowing into the street. There are 22 residences out of water while repairs are made," a spokesperson, Todd Hartman, wrote to Denverite.
Kevin Beaty contributed reporting to this story.
