The Bureau of Mines and the U.S. Geological Survey cooperatively studied the Chugach National Forest, Alaska, from 1979 to 1982 as part of the roadless area review and evaluation (rare II) program. The Bureau evaluated the mineral production potential of the area. This included literature and claim records research, field examination of all reported mines, prospects, and occurrences that could be located, followup of anomalous geochemical samples, and reconnaissance of terranes with little prospecting or mining history. This report covers the central 790,880 acres of the forest. Copper, with byproduct zinc, silver, and gold, has been the major metal produced from the study area as well as from the entire Chugach National Forest. The majority of the copper deposits are concentrated within basaltic rocks on Knight Island, but the major producers are hosted by sedimentary rocks on Latouche Island. Approximately 182.6 million lb of copper, 1.5 million oz of silver, and an unknown but substantial amount of gold were produced during a 30-year period. Currently no mines in the area are producing. Reserves with mineral production potential total 4.6 million tons, with grades of 1.6% Copper, 0.30 Oz silver/ton, and 0.04 Oz gold/ton.