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 September 03, 2026
Mean Flow: 127000 cfs
Max Flow: 245000 cfs (1880)
Min Flow: 66000 cfs (1994)

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

Data Used In Plot   "label   USACE Observations   USACE Project   USACE Map   


Hydrograph plot for TDAO3

Data Used In Plot   "label   USACE Observations   USACE Project   USACE Map   


Hydrograph plot for TDAO3

Data Used In Plot   "label   USGS Observations   USACE Project   USACE Map   


Hydrograph plot for TDAO3

Data Used In Plot   "label   USGS Observations   


Hydrograph plot for TDAO3

Data Used In Plot   "label   United States Geological Survey