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.

View of manufacturing plant in Houston, Texas.

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. 26.

Construction of nine-foot diameter Parmley Concrete Segmental tunnel, Houston, Texas.

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. 55.

Ten-foot diameter Parmley Concrete Segmental tunnel. Houston, Texas, under business center of city.

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. 56.

Photograph from the Progressive Houston citing cost-savings in the use of Parmley segmental pipe in Houston, Texas.

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. 57.