Henry Lee's involvement in irrigation and water-related problems led to the construction of Denver's first pumping station and the founding of the Agriculture Ditch Company. Henry served as secretary from the time the company was organized until his death. To support their extensive farming business, Henry and William Lee built the Lee and Brothers Lateral Irrigation Ditch, which ran along Middle Golden Road, now known as 32nd Avenue. William Lee also ran the Lee Sand and Gravel Company along Youngfield from 38th Avenue to North Golden Road (now known as 44 Avenue).