This report documents results of a study to evaluate tar sand mining. Volume I is concerned primarily with an assessment of tar sand resources amenable to mine production. Tar sand resources in nine states are reviewed and assessed for potential exploitation by three recover methods - surface mining, underground mining, and mine-assisted in situ. An evaluation method is proposed whereby technical, economic, and other nontechnical factors affecting mining could be combined meaningfully to capture collectively an assessment of mineability. Technical considerations affecting mineability by each recovery method are reviewed briefly. Potential environmental and institutional constraints to tar sand development are discussed.