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 May 02, 2026
Mean Flow: 259000 cfs
Max Flow: 493000 cfs (1904)
Min Flow: 130000 cfs (1944)

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   ---