SNAKE − AT HELLS CANYON DAM (HCDI1)
   State:  Idaho
   County:  Adams
   Latitude:  45 15' 5" North
   Longitude:  116 41' 49" West
   Elevation:  1400 ft

   Supporting NWS Forecast Office: WFO Pendleton
   Click for NWS Official River Forecasts for HCDI1
   
Daily Historical Statistics for July 13, 2026
Mean Stage: 65.49 ft  Mean Flow: 14300 cfs
Max Stage: 69.42 ft  Max Flow: 29400 cfs (1983)
Min Stage:  62.48 ft   Min Flow: 6640 cfs (1992)

Statistics based on water years: 1966-2024
* 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 HCDI1

Data Used In Plot   "label   USGS Observations   


Hydrograph plot for HCDI1

Data Used In Plot   "label   USGS Observations   


Hydrograph plot for HCDI1

Data Used In Plot   "label   USBR Observations   


Hydrograph plot for HCDI1

Data Used In Plot   "label   USGS Observations