Ballard County ( 8,389 acres); Peal Unit (1,724 acres): 4 miles west of Barlow on Mounds City Landing Road. River bottomland with marshlands and cypress swamps; 2 roads, access to 3 oxbow lakes. Special regulations for waterfowl hunting. Upper Blenderman Unit (204 acres): same address as Peal. Special regulations for waterfowl hunting. Zola Taress Unit (100 acres): same address as Peal. Open under statewide regulations. Stevens Unit (73 acres): same address as Peal. Special regulations for waterfowl hunting. Swan Lake Unit (2,200 acres): 6 miles northwest of Wickliffe on US 51/60. Primarily bottomland and flood plain area of the Ohio River, with several lakes and some interior gravel roads. Wintering ring-billed and herring gulls, double-crested cormorants, waterfowl, bald eagles. Special regulations for hunting, advance application for waterfowl hunting. Except for designated observation area, Swan Lake Unit closed Oct. 15-March 15 as waterfowl refuge. Public hunting closed when floodwaters prevent safe entry to blinds by wheeled vehicles. Fishing and boating available. Open under statewide regulations. Olmsted Unit (2,096 acres): 4 miles west of Barlow on Salle Crice Road. Special regulations for waterfowl hunting. Other units include the Stalling Unit (148 acres) and the Perkins Unit (160 acres).