The primary purpose of this report is to cover in detail activities at the BI-GAS Coal-Gasification Pilot Plant from November 1979 through August 1982. During this period Stearns-Roger Incorporated was the prime contractor for the project. Progress included improvements in the reliability of coal and char feeding systems, maintenance of slag tapping, durability of the char burners and removal of supplemental fuel gas. (Operations had previously been conducted using supplemental gas feed to insure a reducing atmosphere in the gasifier.) Durations of test runs using Montana Rosbud coal were increased, in some cases to over 150 hours without serious equipment problems. The process and equipment modifications which led to these improvements are discussed in the report. In addition, summaries of each gasifier test, major plant modifications and conclusions and recommendations are included. Volume 2 contains topical reports which describe the operation of the gasifier and each of the auxiliary process areas as well as heat and material balance data, computer simulation, gasification of Pittsburgh seam coal and materials evaluation.