1. Map showing seiche, rockslide, rockfall, and earthflow hazards in the Henrys Lake quadrangle, Idaho and Montana [cartographic material] Yale Public content 1972. 2013-04-04T18:59:17Z. 2013-04-10T17:34:25Z. Witkind, Irving Jerome, 1917-. U.S. Geological Survey. English. Public. Idaho, Henry's Lake Region, Fremont County, Montana, Beaverhead County, and Gallatin County.