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Period: to
Ilinois River Timeline
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1970
Oklahoma designates the Illinois River a scenic waterway under the 1968 Wild and Scenic Rivers Act. (K.D) -
1972
U.S. government passes the Clean Water Act. (S.B) -
1988
Environmental Protection Agency permits Fayetteville, Arkansas, to dump treated waste water, but that it must meet Oklahoma water quality standards. (C.R) -
1992
U.S. Supreme Court rules Arkansas may dump treated sewage into the Illinois River watershed, but that it must meet Oklahoma water quality standards. (C.R) -
1993
Oklahoma begins gathering data on phosphorous and other pollutants in the Illinois River. (C.R) -
1996
State of Oklahoma issues report detailing high levels of contaminants in Lake Tin-killer. (C.R) -
2003
Arkansas and Oklahoma agree to work together to reduce pollution in the Illinois River watershed. (C.R) -
2004
Poultry companies submit plan to reduce chicken litter application in Oklahoma river watershed. Oklahoma Attorney General Drew Donaldson calls plan "lacking." (C.R) -
2005
Edmond files a federal lawsuit against 14 poultry companies, accusing them of polluting the Illinois River watershed with chicken litter. (S.B) -
2007
Citing data obtained through water and soil samples, state seeks preliminary injunction banning the use of poultry litter in the Illinois River watershed. (S.B) -
2008
Judge rejects state's request for a preliminary injunction to prevent the land application of poultry waste. (S.B) -
2008
Poultry industry seeks to have case dismissed because it failed to properly include the Cherokee Nation, which claims water rights in the watershed. (S.B) -
2009
Judge rules that state can't seek millions in damages because it failed to properly include the Cherokee Nation, which claims water rights in the watershed. (K.D) -
2009
Federal trial begins in Judge Gregory Frizzle's courtroom. (K.D) -
2010
Final arguments in chicken poultry case. After than five years, no decision has been rendered. (K.D) -
2013
Oklahoma and Arkansas announce joint three-year study of water quality in the Illinois River watershed. (K.D) -
2015
U.S. Environmental Protection Agency makes available for comment a proposed Illinois River Watershed Modeling Program. (K.D)