Texas (58,588 miles), Louisiana (18,900), Oklahoma (18,539), Kansas (15,386), Illinois (11,900) and California (11,770)
.. aus den 30ern und 40ern
https://en.wikipedia.org/wiki/File:Natural_gas_pipelines_map.png
https://en.wikipedia.org/wiki/Natural_gas_pipeline_system_in_the_United_States