Much of the increase in US LPG production has been driven by increasing production at natural gas processing plants, which has nearly doubled since 2010, reaching close to 1.8 million bpd in 2016. In the West Coast region, however, natural gas processing plant production stayed nearly flat at just less than 34 000 bpd in 2016. Relatively low levels of in-region production and a lack of LPG pipeline infrastructure have left the West Coast isolated from the LPG-related industrial growth that has occurred throughout the rest of the US, especially along the Gulf Coast (PADD 3). As a result, rail shipments have become a growing means of transporting LPG to the region.