DULAC, La. (AP) - The Coast Guard says it is investigating the cause and impact of a small oil spill in a Louisiana marsh.

  

A news release Tuesday said a controlled burn Monday got rid of nearly 1,700 gallons of oil that had escaped from a pipeline near Dulac. The line is owned by Texas Petroleum Investment Co.

  

The Coast Guard says it was notified of the spill Nov. 15, and a cleanup company put a floating barrier around the spill and sorbents onto the oil the same day.

  

The fire was set to get rid of an estimated 1,680 gallons of crude remaining in the marsh. It burned about three hours.

  

The Coast Guard says the impact to wildlife and the environment has not yet been determined.