USGS Water-Year Summary 2020
01010000 ST. JOHN RIVER AT NINEMILE BRIDGE, ME
LOCATION - Lat 46°42'02", long 69°42'56" referenced to North American Datum of 1983, Aroostook County, ME, Hydrologic Unit 01010001, on right bank in T12 R15, 0.1 mi downstream from Ninemile Brook, 0.4 mi downstream from site of Ninemile Bridge, and 11 mi northwest of Clayton Lake Post Office.
DRAINAGE AREA - 1,341 mi².
- WDR ME-82-1: Drainage area.
PERIOD OF RECORD - DISCHARGE: October 1950 to current year.
GAGE - Water-stage recorder. Datum of gage is 931.26 ft above National Geodetic Vertical Datum of 1929.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 44,400 ft³/s, May 1, 1974, gage height, 12.63 ft; maximum gage height, 23 ft, Apr. 11, 1991, estimated from flood marks (backwater from ice); minimum discharge, 32 ft³/s, Sept. 10, 2002; gage height, 0.19 ft.
PERIOD OF RECORD - CHEMICAL ANALYSES: Water years 1976, 1981.
PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: October 1975 to September 1980.
WATER TEMPERATURE: October 1975 to September 1980. August 2012 to September 2015 (discontinued).
INSTRUMENTATION - In-situ thermistor located on right bank 75 feet streamward of gage house and about 0.5 feet above river bed.
EXTREMES FOR PERIOD OF DAILY RECORD - WATER TEMPERATURE: Maximum, 30.6°C, July 16, 2013; minimum, -0.1°C, on many days during winter periods in water years 2012-2015.