LAWRENCE, Kan. - A northeast Kansas reservoir has become the state's 22nd lake with a confirmed population of zebra mussels. The Kansas Department of Wildlife, Parks and Tourism said Tuesday that samplings of various locations in Clinton Reservoir found a widespread adult population of the nuisance mollusks. The 7,000-acre lake west of Lawrence is managed by the U.S. Army Corps of Engineers, while the state manages its fishery. Other reservoirs in northeast Kansas with zebra mussel infestations include Milford, Perry, John Redmond and Melvern. Zebra mussels multiply rapidly and threaten native wildlife while also clogging water-supply intakes. They're often introduced into lakes by attaching themselves to boats. Kansas officials are repeating their advice to boaters to clean, drain and dry their boats and equipment between uses.