Lying beneath the streets and homes of Minneapolis are over 1,000 miles of water pipes. These pipes carry water from pumping and filtration systems along the Mississippi River to thousands of homes and businesses and cycle waste back into the river. This system represents the culmination of a century of urban planning and infrastructure development. This tour provides an understanding of how over the span of 100 years, the physical spread of typhoid in addition to city officials’ interpretation of how the disease worked, influenced the development of Minneapolis’ municipal water system. Though the scientific beliefs of late 19th century doctors and city officials have long been proven false, the remnants of their theories lie cast in concrete, iron and wood under the feet of every Minneapolitan.