David Kukla. Cedarburg, WI. This Little Free Library is a replica of the Electric Interurban Depot Building in Cedarburg, WI. Built circa 1907, the depot served the Interurban Electric Railway and was part of southeastern Wisconsin's Transit system in the first half of the century. The former railway now forms the countywide Interurban Bike Trail in Ozaukee County. This Little Free Library was built and installed by David Kukla in 2013 and sits three blocks away from the actual depot.