TACOMA, Wash. (AP) — Environmental groups in Washington state have sued an electric utility company, alleging it violated the Clean Water Act after turf polluted the Puyallup River during a construction project last year. The News Tribune reported that Citizens for a Healthy Bay and Seattle-based Puget Soundkeeper Alliance filed a lawsuit last week against Electron Hydro LLC after crews placed a layer of turf in the bed of the river while working on the Orting hydropower dam built. Portions of the turf escaped and flowed downstream. Electron Hydro Chief Operating Officer Thom Fischer said crews have recovered almost all of the turf but argued against the allegations that the dam itself pollutes.