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LOCATION.--Lat 43° 54'28", long 118° 09'08", in NW1/4 NE1/4 sec.22,
T.19 S., R.37 E., Malheur County, Oregon, Hydrologic Unit 17050116,
on left bank at Beulah, 0.3 mi downstream from Agency Valley Dam,
12 mi northwest of Juntura, and at mile 14.5.
DRAINAGE AREA.--440 mi2, approximately.
PERIOD OF RECORD.--June 1926 to current year. Published as "near Beulah"
June 1926 to September 1935.
REVISED RECORDS.--WSP 1397: 1927-32, 1934, drainage area.
GAGE.--Datum of gage is 3,261.20 ft above NGVD of 1929. Prior to Apr. 25, 1926,
water-stage recorder at site 1 mi downstream at different datum. Apr. 25, 1936
to Sept. 30, 1949, nonrecording gage at site 20 ft downstream at datum 1.0 ft
higher. Oct. 1, 1949 to June 30, 1964, at present site at datum 1.0 ft higher.
REMARKS.--Flow regulated since 1935 by Beulah Reservoir (sta 13217000).
Diversions for irrigation upstream from station.
AVERAGE DISCHARGE.--67 years (water years 1936-2002), 145 ft3/s, 104,800 acre-ft/yr,
regulated period.
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 7,000 ft3/s May 7, 1942,
gage height, 9.4 ft, present datum, from floodmark, caused by failure of gates
at Agency Valley Dam, from rating curve extended above 1,100 ft3/s on basis of
computation of peak flow over dam; no flow at times.
Station operated in cooperation with U.S. Bureau of Reclamation.
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