GILPIN COUNTY, Colo. (CBS4) – One lane of State Highway 119 remains closed Monday after a contractor struck an underground spring Sunday morning, sending water across both lanes of the roadway and forcing a day-long full closure.

The closure meant a lengthy detour for those traveling north of the gambling towns of Central City and Black Hawk.

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A flagger is helping Monday to alternate traffic past the scene while crews work to drain water away in order to begin repairs, according to a spokesperson with the Colorado Department of Transportation.

(credit: Colorado State Patrol/Twitter)

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CDOT’s Presley Fowler said a contractor was installing natural gas pipelines and hit the natural spring. The project is not CDOT’s but was approved by CDOT, Fowler said.

(credit: Colorado State Patrol/Twitter)

CDOT crews are now working with the contractor’s crews to make repairs.

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There is no estimated time of completion for those repairs.