Q How can I learn whether a pipeline is under my property? Posted4 years, 10 months and 12 days ago A Answered4 years, 10 months and 12 days ago Answered byJames O'Bryant The Department of Transportation (DOT) has a tool on its website called The "National Pipeline Mapping System" (http://www.npms.phmsa.dot.gov/PublicViewer/) that you may use by providing a zip code. If you plan to do any digging on your property or in general, please call 811 before starting your project. You can find more information online at http://www.call811.com/