Steam Tunnels / UW Madison
Web https://www2.fpm.wisc.edu/ppnew/splash/ -- UW Physical Plant
Phone (608) 263-3333 -- Steamfitting Shop, UW Physical Plant
Built in 1898. The tunnels that connect most buildings on campus supply steam heat. They contain large steam pipes wrapped in insulation and bundles of wires running along the wall. The pipes inside are 430 degrees, and if damaged, steam shoots out at nine thousand feet per second. The west plant (Walnut St.) and the south plant (Charter St.) operate over 2.5 miles. In all there are 10 miles of tunnels.