DENVER (CBS4) – A water main break on Colorado Boulevard as snarling the evening commute on Monday.

Colorado Boulevard was down to one lane in each direction between 12th and 13th avenues.

READ MORE: Demand For COVID Testing Increases With Arrival Of Omicron Variant

The break occurred at approximately 3:30 p.m. and a Denver Water crew has been working on the break. Repairs could last into the night.

READ MORE: Long Hauler Recovers: COVID-19 Patient Goes Home After 158 Days In Hospital

“Denver Water has not identified the cause of the leak. Many factors can contribute to a service line leak, including age, pipe material, how corrosive the soil is, water flow and temperature,” Travis Thompson with Denver Water said in a statement.

MORE NEWS: State Lawmakers Vow Change After Allegations Of Funeral Homes Selling Body Parts, Giving Families False Cremains  

LINK: Traffic Section