The post-Civil War era brought with it great industrial innovation. Developer James H. Bowen, the "Father of South Chicago," and others in a massive land grab wrested the land from its former existence and founded "Ainsworth" among other communities. This community was formed out of wetland prairie to provide residence for the labor force of European immigrants coming to work at the industries developing along the Calumet River, most notably the North Chicago Rolling Mill Company, built at the mouth of the river in 1881. Only fractions of the original topography and habitat remain as is the case with most of urban Chicago. With the entire Chicago Lakefront built on miles of landfill and slag there still remains a small stretch of semi-secluded beachfront just north of the Southworks Site.