This publication summarizes the in-house and contract research and development projects programed for fiscal year 1980 by the Bureau of Mines under its minerals environmental research activity. The document provides a mechanism for interested parties, including potential contractors, to gain insight into ongoing and projected work of the Bureau's environmental research efforts. Research to identify and correct environmental problems associated with mining and metallurgical operations has long been an integral part of the Bureau's mission. Through the years, efforts of various Bureau programs have yielded valuable information on the origin and control of many of these problems. With the reorganization of the Bureau of Mines in 1979, the minerals environmental technology program was structured to consolidate these efforts into a single program that will systematically investigate all aspects of mining- and processing-related environmental pollution and damage--from initial discovery of the mineral resource to ultimate return of the land to productive use. In fiscal year 1980, the Bureau received an appropriation of about $21 million to conduct research and development work on these problems.