USGS Map I-781-D Map showing Faults and Ground-Breakage Hazards in the Henrys Lake Quadrangle, Idaho & Montana, 1972 by Irving J. Witkind. Scale 1:62,500. Map shows areas of potential Major, Moderate, or Minor Ground Breakage due to Major Earthquakes. Map is used but is in very good condition. Map has writing on outer sleeve. See photos for details of condition. Thanks for looking!