Pipelines are the most common and safest mode of transportation for natural gas.  Pennsylvania is the birthplace to the oil industry.  The first oil well was drilled by Edwin L. Drake in 1859, in Titusville, Pennsylvania.  Mr. Drake hit oil and natural gas at 69 feet below the surface of the earth.  Most in the industry characterize this well as the beginning of the natural gas industry in America.  A two-inch diameter pipeline was built, running 5 and one-half miles from the well to the village of Titusville, Pennsylvania.  The construction of this pipeline proved that natural gas could be brought safely and relatively easily from its underground source to be used for practical purposes.

Looking at the figure below from the U.S. Energy Information Administration website, natural gas pipelines are virtually found throughout the United States.

U.S. Natural Gas Pipeline Network, 2009