The National Register of Historic Places was established in 1966 to list sites, structures, and objects worthy of preservation due to their historical status. Collection includes registration forms for the National Register of Historic Places that were completed in an effort to add buildings from Burnett, Pierce, St. Croix, and Polk counties to the National Register. The completed forms include National Park Service form 10-900, FHR-8-300, a letter from the Mayor regarding the Hudson Bathhouse, and a Intensive Survey of a Historical District in St. Croix County..