USGS Water-Year Summary 2018
05020500 ST. MARY RIVER AT INTERNATIONAL BOUNDARY
LOCATION - Lat 49°00'41.07", long 113°17'58.37" referenced to North American Datum of 1983, in NE 1/4 sec.05, T.0 1., R.25 W., UNSPECIFIED, Hydrologic Unit is unknown, fourth meridian, in Alberta, Hydrologic Unit 10010002, on left bank 1.0 mi north of international boundary, 3.6 mi downstream from Boundary Creek, 6.5 mi southwest of Kimball, Alberta, and 13 mi northeast of Babb, MT.
DRAINAGE AREA - 462 mi².
- Water Supply Paper (WSP) 1308: 1902, 1908-12. WSP 1508: 1902, 1908-09. Water Data Report 1983: Drainage area.
PERIOD OF RECORD - September 1902 to current year. Monthly discharge only for some periods, published in WSP 1308. Published as "near Cardston, Alberta" and "at Cook's Ranch, Alberta" 1902-12 and as "near Kimball, Alberta" 1913-55.
GAGE - Water-stage recorder. Elevation of gage is 4,087.40 ft (referenced to the National Geodetic Vertical Datum of 1929) based upon levels from elevation established at previous site located 1.1 mi upstream by Prairie Farm Rehabilitation Administration. Prior to Jan. 1, 1913, nonrecording gages were located at two sites within 0.3 mi of previous site at different elevations. Jan. 1, 1913 to Oct. 25, 1955, water-stage recorder was located at several sites about 7 mi downstream from present site at various elevations. Oct. 26, 1955 to Mar. 23, 1965, water-stage recorder was located at site 200 ft upstream from previous site at elevation 2 ft higher. Mar. 24, 1965 to Sept. 8, 1975, water-stage recorder was located at site 100 ft upstream from previous site at same elevation. Water-stage recorder was located at site 1.1 miles upstream June 22, 1975 to Oct. 31, 1999. Bureau of Reclamation satellite telemeter is located at the station.
COOPERATION - This is one of a number of stations which are maintained jointly by Canada and the United States.