LAWRENCE, Kan. (AP) — Lawrence city officials have approved buying special equipment to combat zebra mussels after a nearly 2-inch thick layer of the invasive species was found lining a main that carries water from Clinton Lake to a water treatment plant.

City utility workers inspecting the pipe found the coating of mussels that stretched nearly 2,000 feet, said Philip Ciesielski, assistant director of utilities. He said if the mussels are left unchecked they would continue to grow and eventually choke off pipes and intake openings, The Lawrence Journal-World reported (http://bit.ly/2p5Q7lh )....