(credit: CBS)

(credit: CBS)

PARACHUTE, Colo. (CBS4) – Crews are trying to contain a major oil spill north of the town of Parachute.

Federal authorities are working to contain liquid hydrocarbons bubbling up from the ground and they want to protect nearby Parachute Creek.

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Contractors preparing a site for construction discovered the hydrocarbons coming up from the ground last week.

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So far no oil has gotten into the creek.

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Investigators are still trying to determine the source of the spill.