COAST FORK WILLAMETTE − COTTAGE GROVE DAM (COTO3)
   State:  Oregon
   County:  Lane
   Latitude:  43 43' 12" North
   Longitude:  123 3' 0" West
   Elevation:  800 ft

   Supporting NWS Forecast Office: WFO Portland
   Click for NWS Official River Forecasts for COTO3
   
Daily Historical Statistics for May 15, 2026
Mean Stage: 3.38 ft  Mean Flow: 125 cfs
Max Stage: 5.43 ft  Max Flow: 959 cfs (2022)
Min Stage:  2.86 ft   Min Flow: 33 cfs (1977)

Statistics based on water years: 1940-2024
* 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 COTO3

Data Used In Plot   "label   ---


Hydrograph plot for COTO3

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Hydrograph plot for COTO3

Data Used In Plot   "label   ---


Hydrograph plot for COTO3

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