Housing. Manitowac, Wisconsin. Three youthful residents of the 400-unit federal housing project, in Manitowac, Wisconsin, investigate the merits of a neighbor's bird bath. Operated by the National Housing Authority (NHA), this project includes 400 prefabricated demountable, steel channel frame and plywood units, which helps to alleviate the city's housing shortage. Principal residents of the project are naval and civilian employees of Manitowac's shipyards