Two environmental groups filed a federal lawsuit today alleging that Louisville Gas & Electric violated the Clean Water Act by illegally discharging waste into the Ohio River.The Sierra Club and Earthjustice allege that waste water from one of LG&E's coal ash ponds seeped into the river on a near-constant basis for the past five years. Sierra Club organizers point to ayear’s worth of time lapse photos collected from a hidden camera across the river from the Mill Creek power plant. LG&E has a state permit that allows for discharge into the Ohio River on an "occasional" basis. WFPL's Erica Peterson months ago wrote about the permit and the pending legal battle over what constitutes an "occasional" discharge. The state's Energy and Environment Cabinet, which issued the permit, said LG&E hasn't violated the agreement.A spokesperson for LG&E said Wednesday afternoon that a company statement was forthcoming. Earlier: Using Hidden Camera Evidence, Environmental Groups Plan to Sue LG&E Over Discharges Into Ohio RiverUpdate: 3:35 p.m. LG&E RespondsHere's a statement from the utility: