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Federal
Upper Umatilla River Basin, Oregon zoned study area
Department of the Interior —
This polygon shapefile is the delineation of the upper Umatilla River study area boundary. It is split into two regions, the Blue Mountains and the Lowland Plains, as... -
Federal
Upper Umatilla River Basin, Oregon selected subbasins
Department of the Interior —
This polygon shapefile includes selected delineated subbasins (watersheds) of streams within the upper Umatilla River Basin, Oregon. These subbasins, referred to by...