El Paso Natural Gas (EPNG) is an American company and a 10,140-mile pipeline system consisting of a system of natural gas pipelines that brings gas from the Permian Basin in Texas and the San Juan Basin in New Mexico and Colorado to West Texas, New Mexico, Nevada, California, and Arizona.

[2] October 1945: In light of depletion of reserves in California by the war and expected future growth.

EPNG proposed building 720 miles of 26-inch pipeline ($19.8m) to supply California markets with gas from the Permian Basin in Lea County, New Mexico, work to be finished in the spring or summer of 1947.

Line were to end at the Colorado River where it was to connect to the Southern California Gas Company system.

[6] In 1967, El Paso joined with the federal agencies to test the use of a nuclear device to fracture or create fractures in gas-bearing formations: The experiment, called Project Gasbuggy, was considered a success in terms of its objectives.