Section 106 of the National Historic Preservation Act of 1966 required federal agencies to consider how projects might affect historic properties, so because the Federal Highway Administration funded the WIS 57 project, architectural and historical research was conducted within the WIS 57 corridor. The area of potential effect was defined as a 2400-foot-wide corridor centered on the new highway route, and historians documented standing properties more than 50 years old within it. Fifty-six historic properties, including the Namur Belgian-American National Historic Landmark District, were identified, and 22 properties in the study corridor were considered potentially eligible for listing on the National Register of Historic Places. Efforts were then made to avoid affecting those properties, and work with WisDOT led to redesigning the route to avoid as many as possible, including routing the highway out of the Namur Belgian-American National Historic Landmark District. Only one property could not be avoided, a wayside chapel at CTH "S" and Bader Road, which was documented and moved to the grounds of the Shrine of Our Lady of Good Help in nearby Champion, Wisconsin. The Namur Belgian-American National Historic Landmark District, the nation's largest rural Belgian settlement, covers 3,500 acres and preserves the most intact concentration of buildings, farmsteads, and landscape features associated with Belgian-American settlement on the Door Peninsula. Its significance lies in its Old World rural character and strong sense of time and place, with land use and divisions changed little since the turn of the twentieth century. The district includes farmsteads, wayside chapels, commercial buildings, and schools. After the devastating fire of 1871, brick houses of locally made red brick followed traditional Belgian construction, often as one-and-one-half-story farmhouses with gable roofs, rectangular plans, and circular bulls-eye windows under the road-facing gable peak. Roadside chapels similar to those in Belgium stood beside roads and were open to the public, while schools of stone or brick and commercial buildings such as cheese factories and general stores served local agricultural communities. Among individual properties, the August Draize Farmstead includes an 1880 brick house with a front-gabled form, arched lintels, and a bulls-eye window typical of Belgian-American architecture, and such early twentieth-century farmsteads commonly included a house, barn, granary, chicken coop, and outhouse. Joint District School No. 1, built in 1910, is a two-room Neoclassical building with a center arched entry, recessed double doors, and a large transom. The Moise Langlais Farmstead includes a house, granary, and summer kitchen built about 1880, with the summer kitchen and granary rare examples of Belgian-American brick outbuildings. The Chapel of St. Roche was built in 1915 and moved in 1968 to its present location behind the Belgian American Club headquarters in Namur, Wisconsin. The Intersection Wayside Chapel, originally in Red River Township, Kewaunee County, was a small wood and clapboard chapel built in 1900 and moved in 2003 to the Shrine of Our Lady of Good Help property in Champion, Wisconsin. The Pierre Virlee and Company General Store is a red brick, two-story rectangular building erected in 1895, one of the earliest commercial buildings in Brussels, with an Italianate influenced cornice and arched lintels.