As part of a rulemaking proceeding before the State Water Quality Control Commission, DGS successfully obtained revised water quality standards for a stream segment receiving treated effluent from one of Kennecott's coal mine operation.  The revised standards more accurately reflected stream use and background water quality conditions than those initially proposed by the state of Colorado.  DGS attorneys oversaw an enhanced water quality sampling program, retained experts, prepared written testimony for the rulemaking proceeding, and participated in negotiations with the state health department on behalf of the client.