National Pipeline Mapping System https://www.npms.phmsa.dot.gov/PublicViewer/ Created05/06/2011 The National Pipeline Mapping System allows you to find out if there is a natural gas or hazardous liquids transmission pipeline in your community. The map system does not contain gathering or distribution pipelines, such as lines which deliver gas to a customer's home. Therefore, not all pipelines in an area will be visible in the public map viewer. The mapping service should never be used as a substitute for contacting a one-call center prior to excavation activities. Please call 811 before any digging occurs.