USGS Water-Year Summary 2021
09384000 LITTLE COLORADO RIVER ABOVE LYMAN LAKE, NEAR ST. JOHNS, AZ
LOCATION - Lat 34°18'52", long 109°21'42" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 sec.27, T.11 N., R.28 E., Apache County, AZ, Hydrologic Unit 15020001, on left bank 0.75 mi downstream from Coyote Creek, 6 mi upstream from Lyman Dam, and 15 mi south of St. Johns.
DRAINAGE AREA - 706 mi² of which 2 mi² probably is noncontributing.
- WDR AZ-88-1: Drainage area.
PERIOD OF RECORD - Apr. 1940 to current year. Prior to Oct. 1975 published as "above Lyman Reservoir."
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 6,010 ft above sea level, from topographic map. Prior to Dec. 7, 1976, water-stage recorder at site 0.4 mi downstream at datum approximately 20 ft lower, used as supplemental gage Mar. 21, 1980, to Apr. 21, 1987. See WSP 1313 for history of changes prior to 1950.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 16,000 ft³/s July 25, 1940, gage height, 17.1 ft, datum then in use, from floodmarks, by slope-area measurement of peak flow and reservoir inflow studies; maximum gage height, 18.6 ft, Sept. 12, 1975, at previous site (from graph recorded to 18.4 ft). Minimum daily discharge, no flow on many days, in many years.