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Upper Umatilla River Basin, Oregon zoned study area
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 described... -
Upper Umatilla River Basin, Oregon selected subbasins
This polygon shapefile includes selected delineated subbasins (watersheds) of streams within the upper Umatilla River Basin, Oregon. These subbasins, referred to by the name of...