USGS Water-Year Summary 2021
09490500 BLACK RIVER NEAR FORT APACHE, AZ
LOCATION - Lat 33°42'46", long 110°12'40" referenced to North American Datum of 1927, in NW 1/4 sec.12, T.4 N., R.20 E., Gila County, AZ, Hydrologic Unit 15060101, on downstream side of first pier from right bank on highway bridge, 5 mi upstream from confluence with White River and 14 mi west of Fort Apache.(unsurveyed).
DRAINAGE AREA - 1,232 mi².
- WSP 1313: 1914-15, drainage area.
PERIOD OF RECORD - Oct. 1912 to Dec. 1915, Sept. 1916, Oct. 1917 to Jan. 1918, Apr. 1918, Oct. 1957 to current year. Monthly discharge only for some periods, published in WSP 1313.
GAGE - Water-stage recorder. Elevation of gage is 4,345 ft above sea level, from river-profile map. Nov. 1912 to July 1918, nonrecording gages or water-stage recorders at several sites within 1 mi of present site at various datums.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 54,700 ft³/s, Jan. 8, 1993, gage height, 28.10 ft, from rating curve extended above 8,500 ft³/s on basis of slope-area measurements at gage heights 22.33 ft and 24.80 ft; minimum daily, 11 ft³/s, July 6, 1974.