SOUTH SANTIAM − AT WATERLOO (WTLO3)
   State:  Oregon
   County:  Linn
   Latitude:  44 29' 54" North
   Longitude:  122 49' 19" West
   Elevation:  370 ft

   Supporting NWS Forecast Office: WFO Portland

   
Click for NWS Official River Forecasts for WTLO3
   


   Action Stage:  
10.2 ft
   Flood Stage:  
12 ft
   Moderate Flood Stage:  
14 ft
   Major Flood Stage:  
16 ft
Daily Historical Statistics for February 14, 2026
Mean Stage: 4.97 ft  Mean Flow: 4050 cfs
Max Stage: 10.08 ft  Max Flow: 18600 cfs (1930)
Min Stage:  2.55 ft   Min Flow: 564 cfs (1977)

Statistics based on water years: 1906-2024
* statistics estimated based on current rating

Record Stage: 
24.5 ft
Record Flow: 
95200 cfs
Date of Record: 
December 22, 1964

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

Hydrograph plot for WTLO3

Data Used In Plot   "label   ---


Hydrograph plot for WTLO3

Data Used In Plot   "label   ---