A COOPERATIVE DAMAGE ASSESSMENT: LESSONS FROM THE GREENHILL SPILL1
ABSTRACT Following a September 1992 natural gas and oil well blowout in Timbalier Bay, Louisiana, natural resource trustees took action under the Oil Pollution Act of 1990 (OPA), Clean Water Act (CWA), and the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) to restore the natural resources injured by the spill. Trustees appointed by the State of Louisiana and the U.S. Government worked cooperatively with the well owner, Greenhill Petroleum Corporation, in a natural resource damage assessment (NRDA). The resolution of the Greenhill NRDA marks an early success for all parties involved. The process was concluded in December 1993, only 14 months after the spill, when Greenhill and the trustees signed a natural resource restoration agreement. The cooperative assessment and innovative approaches used by the trustees and the well owner resulted in the rapid resolution of the case, rapid environmental restoration, and relatively low assessment costs.