Overview
- All northbound lanes between L Street and Thomas Circle remain closed, with detours sending drivers to 13th or 15th streets.
- Camera inspections reported a large crack along the top of the 42-inch brick-lined tunnel beneath the roadway.
- D.C. Water expects stabilization to take a few days once crews begin, with a goal of reopening lanes by the end of the week, weather permitting.
- The tunnel, abandoned about 50 years ago, was discovered during a prior water-main break and was never properly filled.
- Pedestrian access is maintained where safe, southbound lanes remain open, and utility partners are coordinating to protect nearby lines.