 The city has three sites on the National Register of Historic Places — Memorial Park Site , a significant pre @-@ Columbian archaeological find ; Heisey 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 . 
 The city <a href='got' title='1'><mark>has</mark></a> three sites on the National Register of Historic Places — Memorial Park Site , a significant pre @-@ Columbian archaeological find ; Heisey 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 , <a href='uninflect' title='2'><mark>protects</mark></a> the city from further flooding . While industry <a href='uninflect' title='3'><mark>remains</mark></a> important to the city , about a third of Lock Haven <a href='null_genetive' title='4'><mark>'s</mark></a>workforce is employed in education , health care , or social services . 
The city got three sites on the National Register of Historic Places — Memorial Park Site , a significant pre @-@ Columbian archaeological find ; Heisey House , a Victorian @-@ era museum ; and Water Street District , an area wid a mix of 19th- and 20th @-@ century architecture . A levee , completed in 1995 , protect da city from further flooding . While industry remain important to tdacity , about a third of Lock Haven  workforce is employed in education , health care , or social services .