Aspen prepared an EIS to evaluate the potential environmental impacts associated with the Yellowstone Pipeline Company's application to build a new section of its petroleum products pipeline in western Montana, as well as the renewal of a special use permit for its existing pipeline in western Montana and northern Idaho. Because the proposed project was highly controversial, this EIS included an extensive public participation program that involved ten scoping meetings and recurring informational briefings throughout the project study area, as well as six public workshops and six public hearings on the Draft EIS. Local project libraries, quarterly project newsletters, a project website and Aspen's Missoula satellite office also provided effective project information to the public.