USGS Water-Year Summary 2018
09386300 LITTLE COLORADO RIVER BELOW ZION RESERVOIR, NEAR ST. JOHNS, AZ
LOCATION - Lat 34°36'17", long 109°29'19" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 NW 1/4 T.14 N., R.27 E., Apache County, AZ, Hydrologic Unit 15020002, on left bank 0.50 mi downstream from Zion Reservoir, 10 mi northwest of St. Johns.
DRAINAGE AREA - 1,171 mi².
PERIOD OF RECORD - Sept. 1998 to current year.
REVISED RECORDS - WDR AZ-11-1: Drainage Area.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 5,530 ft above sea level, from topographic map.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 2,470 ft³/s Sept. 11, 2002, gage height, 11.84 ft, from an extension of the rating curve based on the weir equation for submerged weir flow. Minimum daily discharge, no flow for many days.
PERIOD OF RECORD - September 1998 to current year.
INSTRUMENTATION - Automatic pumping sampler installed September 1998.