Progress is being made at the St. Louis Airport Site Tuesday, March 7, 2006. In 1997, an Engineering Evaluation/Cost Analysis (EE/CA) developed by Department of Energy proposed the removal of radioactive contaminated materials immediately adjacent to Coldwater Creek (CWC) at the West End of the St. Louis Airport Site next to the gabion wall and shipped to a licensed out-of-state disposal facility. The remainder of SLAPS was remediated in accordance with the North County Record of Decision, which was issued in September 2005. More than 600,000 cubic yards of radiologically contaminated material was removed from SLAPS over a nine-year period. A formal closing ceremony took place May 30, 2007.