Aspen prepared an EIS for the USDA Forest Service's Lolo National Forest to evaluate the potential environmental impacts associated with Yellowstone Pipe Line Company's application to build a new 67-mile section of its petroleum products pipeline in Western Montana, as well as to renew its special use permit for 82 miles of existing pipeline. The proposed project was highly controversial, and the NEPA process included an extensive public participation program, which involved numerous scoping and public meetings throughout the study area. Aspen prepared a Draft EIS and 16 supporting Technical Reports. Ultimately, the applicant scaled back its proposal to only the existing pipeline permitting, and a Final EIS and Record of Decision were prepared for that action.