In response to security uncertainties and to increase the defense capabilities of the United States, the U.S government chose Hanford, Washington as the home to the first full scale plutonium production facility as part of the Manhattan Project. Due to the size of the facility more than 1,500 people were told to evacuate their homes and infrastructure including 554 new buildings replaced them. The production of plutonium and eventual modification in to a waste storage facility continued until the late 1980s. In 1988 the facility was put on the National Priorities List for the Superfund Clean Up. What was most concerning was the proximity of the contamination to the Columbia River that is the water source for millions of people. Clean-up continues even today with the threat of ground water contamination still looming. Another aspect of this EJ conflict, is that there were a number of Native American tribes living on this land and had rights granted through treaties to use the resources in this area that are now terribly polluted. Their natural rights were removed and took away part of their abilities to follow traditional ways of living.