[en] This report presents engineering details, statistics, individual borehole histories and geophysical logs of the seven holes drilled in the Missoula/Bitterroot Drilling Program. Objective was to obtain data which could enable more accurate assessments to be made of the favorability for uranium in the predominantly unexplored subsurface of the Missoula/Bitterroot Tertiary basins. This project started on May 9, 1978, and continued until January 9, 1979, when it was temporarily discontinued due to severe weather conditions and serious mechanical problems with the drilling rig. The remaining hole was completed between March 23, 1979, and April 6, 1979