Rivermatics

USGS Streamgage 13333000

Grande Ronde River at Troy, OR

Grande Ronde River at Troy, OR is USGS streamgage 13333000 in Oregon, monitoring river discharge in hydrologic subbasin 17060106. It drains a watershed of about 3,275 square miles. Discharge records at this site go back to 1944. Typical flow runs near 1,789.9 cfs in July and 5,818.3 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
Oregon
Drainage area
3,275 sq mi
Subbasin (HUC-8)
17060106
Coordinates
45.9457, -117.45101
USGS site number
13333000
Records begin
1944-10-01 (82 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 82 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 804.7 1,428.1 4,348.1
February 998.6 2,176.6 6,344.5
March 1,757.4 3,735.2 8,032.9
April 3,021.7 5,818.3 10,469.3
May 3,795.5 6,784.2 11,464.8
June 2,548.3 5,240 8,999
July 840.5 1,789.9 3,599.7
August 472.2 724.2 1,153.2
September 472.9 688.9 971.2
October 575.7 784.8 1,131.9
November 697 961.5 1,794.7
December 724.5 1,179.4 3,325.5

All values in cubic feet per second (cfs).

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