PROVISIONAL DATA SUBJECT TO REVISION

Station operated in cooperation with Portland General Electric.

STATION.-- 14092500 DESCHUTES RIVER NEAR MADRAS, OR

LOCATION.--Lat 44° 43'34", long 121° 14'45", in SE 1/4 SW 1/4 sec.1, T.10 S., R.12 E., 
Jefferson County, Hydrologic Unit 17070306, on right bank 400 ft downstream from 
reregulating dam, 2.7 mi downstream from Pelton Dam, 8.5 mi northwest of Madras, and at 
mile 100.1 [location map]
DRAINAGE AREA.--7,820 mi2, approximately. 
PERIOD OF RECORD.--October 1923 to current year. 
REVISED RECORDS.--WSP 1398:  Drainage area. 
GAGE.--Water-stage recorder.  Datum of gage is 1,390.25 ft above NGVD of 1929 (levels by 
Portland General Electric Co.). See WSP 1738 for history of changes prior to 
Nov. 23, 1957. 
REMARKS.--Diurnal fluctuation caused by Lake Simtustus and reregulating reservoir since 1957, 
combined capacity for normal operation, 6,500 acre-ft. Some winter and spring runoff 
stored in Ochoco Reservoir, capacity, 47,500 acre-ft, in Crescent Lake, Crane Prairie and 
Wickiup Reservoirs, combined capacity, 354,600 acre-ft, and since 1960, in Prineville 
Reservoir, capacity, 152,800 acre-ft, andsince 1964, in Lake Billy Chinook, capacity, 
534,700 acre-ft.  Large diversions in upper basin for irrigation. Continuous 
water-quality records for the period October 1978 to September 1988 have been collected 
at this location. 
EXTREMES FOR PERIOD OF RECORD.--Maximum discharge, 22,500 ft3/s July 16, 1983, accidental 
release from Pelton Dam, gage height, 7.70 ft, from floodmarks; minimum discharge, 
916 ft3/s July 4, 1982, caused by power company testing control gates on dam.
EXTREME FOR FEBRUARY 1996 FLOOD.--Maximum discharge, 19,100 ft3/s, Feb. 8, gage height, 
7.08 ft; minimum discharge, 3,420 ft3/s May 13, result of regulation.
NOTE: River forecasts and additional data can be obtained at the National Weather Service's Advanced Hydrologic Prediction Services web page.

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