This Draft supplemental environmental impact statement (SEIS) for the Ruby Pipeline Project was prepared by the Bureau of Land Management (BLM) in response to a ruling from the Ninth Circuit Court of Appeals (case nos. 10-72356, 10-72552, 10-72762, 10-72768, and 10-72775). The ruling directed the BLM to undertake a revised cumulative effects analysis of the Ruby Pipeline Project final environmental impact statement (EIS0 as it related to the cumulative loss of sagebrush steppe vegetation and havitat. This Draft SEIS contains supplemental information about the original and present condition of the sagebrush steppe vegetation and habitat, and analyzes the cumulative impacts of the Ruby Pipeline Project based on the supplemental information. This Draft SEIS tiers to and incorporates by reference the information and analyses contained in the Ruby Pipeline Project final EIS.