1. Geohydrologic conditions and land use in the Gallatin Valley, southwestern Montana, 1992-93 Yale Public content 1995. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; Earth Science Information Center, Open-File Reports Section, distributor. English. Public. Gallatin River Watershed (Wyo. and Mont.) and Montana.