2020 Map of Cochran Reservoir

About this map

Cochran Reservoir sits at the center of this 2020 study of southeastern Montana, marking a vital water source in an area defined by complex drainage networks. The landscape is carved by the various branches of Willow Creek, including the N Fork Willow Cr, Middle Fork Willow Cr, and S Fork Willow Cr, which wind through the township boundaries of T8S and T9S. The presence of features like Nelson Washout and numerous named coulees suggests a terrain shaped by intermittent but powerful water action.