Anhydrous ammonia in the United States is currently transported by a 3,100 mile pipeline network. The first is graphic is a good portion of the network, showing its root at the Gulf of Mexico. About half of our total ammonia use now comes from offshore, and much of that from stranded natural gas on the Caribbean island of Trinidad. The second image was provided to us by Magellan and it shows their major locations. This is not a complete representation, as we're aware of ammonia feed lines into the Spencer, Iowa area, that do not appear on this map, and we suspect there are quite a few others scattered around corn country.

This pipeline network is augmented with truck, barge, and a steadily decreasing amount of rail transport. There is also nearly 5 million tons of NH3 storage in large terminals along the pipeline and rivers

Anhydrous ammonia makes up only a fraction of the US consumption, roughly about a third. The rest is used in other ammonia-based forms such as urea, aqueous ammonia, and UAN solution. Those forms are ordinarily transported by truck, not by pipeline.