Great Dayton Flood

The Great Dayton Flood of 1913 hit Dayton, Ohio, and the surrounding area with water from the Great Miami River, causing the greatest natural disaster in Ohio history. In response, the General Assembly passed the Vonderheide Act to enable the formation of conservancy districts. The Miami Conservancy District, which included Dayton and the surrounding area, became one of the first major flood control districts in Ohio and the United States.