The Old Gulf Oil Refinery site operated by Chevron is located on 3,800 acres along the lower Neches River in the City of Port Arthur, Jefferson County, Texas. In operation since the early 1900s the facility produced refined petroleum products including motor oil, gasoline, lubricating oils, diesel fuels, gasoline, kerosene, jet fuel, fuel oils, naphtha, and petrochemical products. Alligator Bayou traverses the site and historically wastewater and storm water runoff was discharged directly into this waterway. In June 1997, Chevron initiated an environmental investigation at and adjacent to the Refinery and took corrective measures to contain the further release of hazardous materials. In June 1999, using data gathered by Chevron during investigations at the site, the NRDA Trustees and Chevron began a cooperative assessment to evaluate potential injury to natural resources resulting from historical releases of hazardous substances. Primary resources at risk were open water, sediments, benthic invertebrates, wetlands, birds, terrestrial wildlife and fish. In February 2005, a Consent Decree was completed which required Chevron to undertake three restoration projects. All three projects have been completed within the Lower Neches Wildlife Management area in Jefferson County, Texas. These projects included the construction of water control structures and levees at the J. D. Murphee wildlife management area and the construction of 85 acres of salt marsh and 30 acres of wet prairie in the Old River South Marsh Complex of the J.D. Murphee wildlife management area.