The Bureau of Land Management determined a need to update the oil and gas Reasonable Foreseeable Development Scenario for the Rock Springs Field Office, Wyoming. We have gathered resource information on the potential magnitude and trend of future oil and gas activity so that staff of the Field Office can analyze associated management activities, future decisions, and environmental impact. The Field Office will use this information to update the cumulative analysis previously prepared for the EIS for the Green River Resource Management Plan for the next five years (2007-2011).