The Parmley System was a comprehensive system of reinforced concrete constructions (monolithic, segmental, and unit pipes). The first patent for the system was issued in 1902. This catalog features segmental pipe construction, which Parmley believed was one of the most efficient methods by which sewers and pipe lines could be built.

Abutment and deeply imbedded outlet sewer, 8 feet diameter, South Chicago, Illinois. Sewer is several feel below storm water level of Lake Michigan.

Source: Walter C. Parmley, The Parmley System of Arch Construction: Catalogue E, Segmental Concrete, Plain and Reinforced (New York, NY: Walter C. Parmley, 1927), p. 51.