LOCATION.--Lat 43° 35'00", long 111° 44'46"
(NAD83), in SE1/4 SE1/4 sec.16, T.3 N., R.40 E., Bonneville County,
Hydrologic Unit 17040205, Poplar quad., on right bank 0.25 mi
downstream from Ririe Dam, 3.4 mi southeast of Ririe, and at mile
DRAINAGE AREA.--627 mi2.
PERIOD OF RECORD.--April 1903 to September 1904, October 1916 to
September 1925, May to August 1928, October 1962 to September 1979,
October 1985 to current year. Monthly discharge only for some
periods, published in WSP 1317.
GAGE.--Water-stage recorder. Elevation of gage is 4,950 ft above
NGVD of 1929, from topographic map. Prior to September 1904,
nonrecording gage at site about 3.25 mi downstream at different
datum. October 1916 to June 1921, nonrecording gage, June 1921 to
August 1928, water-stage recorder at present site. October 1962 to
September 1979, at site 1.75 mi downstream at different datum.
REMARKS.--Diversions above station for irrigation of about 7,300
acres, of which about 100 acres are irrigated by withdrawals from
ground water (1966 determination). Since May 1924, water has been
diverted from Grays Lake some years, about 40 mi upstream, into
Meadow Creek basin and thence into Blackfoot Reservoir. Flow
regulated by Ririe Reservoir beginning December 1975, with some
storage beginning July 1974. During winter months when gates at Ririe
Dam are closed, seepage may pass the gage, but sinks into the
gravels; consequently this flow is not published. No peaks after
2005; site is totally regulated (as a canal).
EXTREMES FOR PERIOD OF RECORD.-- UNREGULATED PERIOD (1903-74):
Maximum discharge observed prior to regulation by Ririe Reservoir,
4,200 ft3/s May 15, 1917, gage height, 16.30 ft; minimum
daily, 1.2 ft3/s Aug. 12, 1974. REGULATED PERIOD (1975 to
current year): Maximum discharge since regulation began in 1975,
2,320 ft3/s May 20, 1975, gage height, 14.07 ft; no flow
for long periods most years.
EXTREMES OUTSIDE PERIOD OF RECORD.--Maximum discharge since 1899,
5,080 ft3/s Feb. 11, 1962, from estimate based on field
survey, gage height, 15.0 ft from floodmarks; stream reported
practically dry during summers of 1899 and 1934.