CU used flood irrigation on campus until 1988. Each night, water flowed across lawns from concrete-lined laterals which were blocked with sandbags or masonite gates. Galvanized funnels slid into the ditch and fed 10" canvas hoses, which stretched across the lawns to deliver water to far corners. Today, many old laterals remain as historic features of Norlin Quadrangle.
Right: Laterals on the CU campus.