Most rivers are those used by large communities as a supply of drinking water and to farmers for their produce. The State Department assembled a commission of competent persons and conducted an investigation into the risks and consequences of this project. Some of the conclusions about the spills were, for example, that: "One million gallons of tar spilled into the Kalamazoo River in Michigan... 40 miles of this river is still contaminated to this day." Another example of spills affecting communities was a 20-foot crack in a pipeline in 2013 that caused a massive oil spill, damaging residential neighborhoods and Lake Conway in Arkansas. These oil spills and “accidents” are affecting not only people's lives but also wildlife, ecosystems, and air and water quality