COLUMBIA − THE DALLES DAM (TDAO3)
   State:  Oregon
   County:  Wasco
   Latitude:  45 36' 0" North
   Longitude:  121 10' 0" West
   Elevation:  80 ft
   Full Pool Elevation:  160 ft


   Supporting NWS Forecast Office: WFO Pendleton
   Click for NWS Official River Forecasts for TDAO3
   
Daily Historical Statistics for February 14, 2026
Mean Flow: 133000 cfs
Max Flow: 373000 cfs (1996)
Min Flow: 45800 cfs (1884)

Statistics based on water years: 1879-2023
* 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 TDAO3

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Hydrograph plot for TDAO3

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Hydrograph plot for TDAO3

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Hydrograph plot for TDAO3

Data Used In Plot   "label   USGS Observations   


Hydrograph plot for TDAO3

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