The extent and origin of nitrates in the Flaxville aquifer need to be defined. In and Near the East Poplar Oil Field, Northeastern Montana. Disposal of the brine apparently has resulted in contamination. Delineation of the 100-Year Flood Plain Along Streams in the Northern Cheyenne Indian Reservation. The areas that would be inundated by a 100-year flood along streams in the Northern Cheyenne Indian Reservation are of interest to the Northern Cheyenne Tribe.
Information is needed to adequately delineate areas prone to flooding along streams.
This information will assist the Tribe in making decisions concerning the location of buildings, structures, roads, and other facilities to preclude the uneconomic, hazardous, or unnecessary use of the floodplain in connection with facilities. Bald Eagle Survey. Representatives of the Nez Perce and the Confederated Salish and Kootenai Tribes assisted in BRD's 1997 Midwinter Bald Eagle Survey. Tribal members conducted eagle counts in portions of Idaho and Montana. The USGS scientists are analyzing data from 37 Tribal areas and States to assess regional and national population trends for bald eagles.