Home [www.marathonpipeline.com] Protecting You, Your Property, and the Pipeline. Resources for Landowners and Residents. Pipeline Emergency? Call 911, and then call Marathon Pipe Line LLC at 1.833.675.1234. Protecting You, Your Property, and the Pipeline. Resources for Landowners and Residents. Pipeline Emergency? Call 911, and then call Marathon Pipe Line LLC at 1.833.675.1234.