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Elk <br /> _ River, <br /> o <br /> 1972 — Federal Clean Water Acts <br /> 1987 - Clean Water Act was amended ( Phase 1 ) <br /> } <br /> 1990's - Clean Water Act amended a ain ( Phase II g ) t <br /> r <br /> � ay <br /> 2003 - Elk River was designated as MS4 & required to <br /> obtain an NPDES permit from MPCA <br /> ell <br /> • <br /> r <br /> ;i f,. '•1 .:s:' �/ �w'.'Ylr7 ,,..,,,.,r.. � YY! i"I'J'iGi+`�.A. <br />