USGS Water-Year Summary for Site 09448500

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	00060 Discharge(Mean)

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Water year 2022: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2022

09448500 GILA RIVER AT HEAD OF SAFFORD VALLEY, NEAR SOLOMON, AZ

LOCATION - Lat 32°52'57.80", long 109°28'46.58" referenced to North American Datum of 1983, in SE 1/4 NE 1/4 sec.28, T.6 S., R.28 E., Graham County, AZ, Hydrologic Unit 15040005,

on right bank 2.6 mile upstream from intake of Brown Canal, 10 mi northeast of Solomon and 15 mile downstream from San Francisco River. Prior to Jan. 31, 2017 the gage was located on the left bank 0.6 mi downstream from intake of Brown Canal, 8 mi northeast of Solomon, and 17 mi downstream from San Francisco River. Gage is above diversions to the Safford Valley Agricultural area.

NOTE: the auto-generated Lat Long provided above is for the previous gage location that is about 2.5 miles downstream of the current location. The correct latitude longitude for the current location is 32 52 57.9 lat 109 28 46.6W long

DRAINAGE AREA - 7,856.78 mi².

REVISIONS HISTORY - WSP 1059: 1914, 1916-17, 1923(M), 1924-25, 1927, 1929-31(M). WSP 1179: 1915, 1918-19(M). WSP 1313: 1934. WSP 1733: 1923.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Apr. 1914 to current year. Monthly discharge only for some periods, published in WSP 1313. Prior to Oct. 1932 and Oct. 1940 to Sept. 1949 published as "near Solomonsville" and Oct. 1932 to Oct. 1933 and May 1935 to Sept. 1940 as "below Bonita Creek near Solomonsville."

GAGE - Water-stage recorder. Datum of gage is 3,145 above sea level. Prior to Jan. 31, 2017 datum of gage was 3,059.92 ft above sea level and at datum 4.96 ft higher prior to July 8, 1980. See WSP 1733 for history of changes prior to Jan. 1, 1941. A supplementary water-stage recorder and Parshall flume on Brown Canal is maintained by the Gila Water Commission.

COOPERATION - Gila Water Commissioner.

REMARKS - Records good except for estimated discharge which are poor. After Jan. 31, 2017 gage is located above Brown Canal diversion. Prior to Jan. 31, 2017 records show water reaching head of Safford Valley but do not include water diverted to Brown Canal. Diversions above station for mining, municipal use, and for irrigation of about 17,500 acres, much of it by pumping from ground water.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 132,000 ft³/s Oct. 2, 1983, gage height, 20.8 ft, from rating curve extended above 52,000 ft³/s on basis of slope-area measurements at 14.40 ft and 20.8 ft; minimum, 11 ft³/s June 25, 1956.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Jan. 1976 to Sept. 1981, Oct. 1988 to current year.