 The city has three sites on the National Register of Historic Places — Memorial Park Site , a significant pre @-@ Columbian archaeological find ; <unk> House , a Victorian @-@ era museum ; and Water Street District , an area with a mix of 19th- and 20th @-@ century architecture . A levee , completed in 1995 , protects the city from further flooding . While industry remains important to the city , about a third of Lock Haven 's workforce is employed in education , health care , or social services . 
