The Bayport Terminal was controversial since before its construction because of concerns raised about environmental impact and the general suitability of the site. The Army Corps of Engineers approved the permit, but stated in the Environmental Impact Statement that unavoidable impacts of increased noise in the area, increased levels of nitrous oxides, sulfur dioxide, carbon dioxide, and cancer causing particulate matter would be emitted by the terminal. Homes are within 600 feet (180 m) of the docks. Due to the prevailing southeast wind and the proximity of the residents, the Corps of Engineers recommended a 30-foot (9.1 m) sound wall to block sound levels that they estimated to be as high as 70 dBA (as of 2010 the terminal was only approximately 30% in operation yet produced levels of 65 dBA). The Port of Houston approached residents who are affected by the pollution and noise and has attempted to buy an easement from these residents. In 2010, the mayor of Shoreacres published a letter to the community raising concerns about the scope of the easement and rights residents might be waiving by accepting it. That same year residents of Shoreacres filed suit against the Port of Houston Authority for damages.