USGS Water-Year Summary 2024
06178000 POPLAR RIVER AT INTERNATIONAL BOUNDARY
LOCATION - Lat 48°59'25.03", long 105°41'48.87" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 SE 1/4 sec.6, T.37 N., R.46 E., Daniels County, MT, Hydrologic Unit 10060003, on left bank 0.7 mi south of international boundary, 1.5 miles upstream from Coal Creek, 18.5 miles northwest of Scobey, and at river mile 135.7.
DRAINAGE AREA - 358 mi².
REVISIONS HISTORY - Water Supply Paper (WSP) 1389: 1931; 1935-37, maximum discharge (M); 1939-40; 1942 (M); 1943; 1948 (M); 1950 (M). WSP 1729: Drainage area. Water Data Report 1984: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - March 1931 to current season (seasonal records only for most years). Published as Middle Fork Poplar River at International Boundary, March 1931 to November 1975.
GAGE - Water-stage recorder and concrete control since September 1977. Elevation of gage is 2,460 ft., referenced to the North American Vertical Datum of 1988.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 12,700 ft³/s, Apr. 6, 1954, gage height, 10.25 ft, from floodmark, from rating curve extended above 2,500 ft³/s, on basis of slope-area measurement of peak flow; no flow at times.
WATER-QUALITY RECORDS
PERIOD OF RECORD - Water years 1964-65, 1976-2013.