The U.S. Bureau of Mines investigated mineral resources in the Silver Creek Study Area of the Nez Perce National Forest, Idaho, during the summer of 1989. The study area included the 36,100-acre Silver- Creek-Pilot Knob Rare II Area (No. 1-849) On the north side of the South Fork Clearwater River, about 11 miles west of Elk City, Idaho. Mines in and near the study area in the Tenmile and Newsome Mining Districts produced about 100,000 oz of gold, mostly from placers. Gold production had an historic value estimated at $2 million, equivalent to nearly $40 million at today's prices. Lode mines produced about 19,000 oz of gold, along with smaller amounts of silver, copper, lead, and zinc. Of 34 mines and prospects examined, 10 lode properties are considered to be significant by virtue of their past development or production and the presence of possibly ore-grade mineralization. There are no identified mineral resources in the study area; however, samples that contained gold and anomalous arsenic delineate a 3-mile-long area, from the sentinel mine north to the blue quartz prospect, where exploration might disclose resources. One mining company is conducting geophysical studies and drilling within the delineated area. In addition, six placer sites may contain enough gold to be of possible interest for future exploration and development.