Regulatory processes associated with development of a world class lead-zinc mine, the Red Dog Mine, in northwestern Alaska were reviewed and evaluated. Informal interviews with key project personnel, consultants, and agency field and permitting specialists provided perspective on the regulatory successes and failures of the project. Due to potential impacts to air quality, water quality, weltands, and national park lands, an environmental impact statement was required. By developing a comprehensive baseline of information on the existing environment to aid in minimizing impacts during project siting and design and through regular coordination of evolving project plans with regulatory agencies, the mine developers were able to acquire necessary permits in a timely and cost- effective manner. The only major exceptions occurred when inadequate information was collected on dispersal of airborne particulates, rates of surface water run-off, and groundwater quality. These deficiencies resulted in the need for emergency design changes, unscheduled construction, additional environmental monitoring costs, and delays in issuance of the npdes permit.