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Title: Gas Main And Service Lateral Record System
Author: Henry R. Meyers
Source: American Gas Association 1975
Year Published: 1975
Abstract: The first gas mains were installed in Cincinnati during the 1840s. Location records were prepared on the job site and consisted of a simple sketch on sheet paper. Later, this sketch was plotted on card stock. The overall system was maintained by plotting directly on 4 foot X 4 foot wing maps. A color and graphical code was used to differentiate pipe size and pressure level. This system, though very unwieldy, was maintained with minor variations into the 1960s.