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Water-Year Summary for Site 09405500

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Available Parameters
00060 Discharge(Mean)  

Water year 2023: 2022-10-01 to 2023-09-30
 
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USGS Water-Year Summary 2023
09405500 NORTH FORK VIRGIN RIVER NEAR SPRINGDALE, UT
LOCATION - Lat 37°12'35", long 112°58'40" referenced to North American Datum of 1927, in NW 1/4 SW 1/4 NW 1/4 sec.22, T.41 S., R.10 W., Washington County, UT, Hydrologic Unit 15010008, Zion National Park, on right bank 0.2 mi downstream from point of diversion of Springdale Canal, 0.5 mi downstream from Pine Creek, and 1.9 mi northeast of Springdale.
DRAINAGE AREA - 344 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD - May 1913 to June 1914, June to November 1923, April to June, August and September 1925 (fragmentary), October 1925 to current year. Published as Zion Creek near Springdale 1913-14, and as Mukuntuweap River near Springdale 1923 and 1925-32. Published as combined flow of river and Springdale canal 1932-88.
GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 3,957.92 ft. above NAVD of 1988 from a Level II GNSS survey conducted on May 11, 2021. May 13, 1913 to June 30, 1914, nonrecording gage at site 3.8 mi downstream at different datum. June 6, 1923 to August 20, 1932, nonrecording gage at site 0.8 mi upstream. November 3, 1932 to December 14, 1949, nonrecording gage 50 ft downstream at datum 0.34 ft higher. July 10, 2014 to present, at same site with datum 7.0 ft lower.
REMARKS - Records generally good except estimated discharges which are fair to poor. Some regulation of low flow by Kolob Reservoir (capacity 6910 acre-feet, 22 mi upstream) and several diversions for irrigation upstream of station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 9,150 ft³/s, Dec 6, 1966, gage height, 12.98 ft, from rating curve extended above 2,000 ft³/s on basis of drift measurement at gage height, 6.7 ft, and slope-area measurement at gage height, 10.25 ft; minimum estimated, less than 5.0 ft³/s, Apr 12, 1995, result of landslide 1.0 mi upstream.