Harlan County Lake Seaplane Base is a public use seaplane base located six nautical miles (11 km) southwest of the central business district of Alma, a city in Harlan County, Nebraska, United States. It is owned by the U.S. Army Corps of Engineers.Facilities and aircraftHarlan County Lake Seaplane Base has one seaplane landing area designated E/W which measures 15,000 x 4,000 ft (4,572 x 1,219 m).