COLUMBIA − ROCKY REACH DAM (RRHW1)
   State:  Washington
   County:  Chelan
   Latitude:  47 31' 27" North
   Longitude:  120 18' 3" West
   Elevation:  703 ft

   Supporting NWS Forecast Office: WFO Spokane
   Click for NWS Official River Forecasts for RRHW1
Daily Historical Statistics for July 11, 2025
Mean Flow: 152000 cfs
Max Flow: 320000 cfs (1964)
Min Flow: 40900 cfs (2001)

Statistics based on water years: 1961-2024
* statistics estimated based on current rating

The 4-10 Day Trend Forecast is based on model guidance and uncertainty during this period is greater.

Hydrograph plot for RRHW1


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Hydrograph plot for RRHW1


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Hydrograph plot for RRHW1


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Hydrograph plot for RRHW1


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