BOISE − AT GLENWOOD BRIDGE (BIGI1)
   State:  Idaho
   County:  Ada
   Latitude:  43 39' 38" North
   Longitude:  116 16' 45" West
   Elevation:  2600 ft
   Full Pool Elevation:  0 ft


   Supporting NWS Forecast Office: WFO Boise
   Click for NWS Official River Forecasts for BIGI1
   

   Action Flow:  6500 cfs (9.69 ft)
   Flood Flow:  7000 cfs (10.07 ft)
   Moderate Flood Flow:  11000 cfs
   Major Flood Flow:  15000 cfs
Daily Historical Statistics for August 20, 2026
Mean Stage: 4.44 ft  Mean Flow: 859 cfs
Max Stage: 5.35 ft  Max Flow: 1460 cfs (1997)
Min Stage:  3.62 ft   Min Flow: 423 cfs (1992)

Statistics based on water years: 1982-2024
* 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 BIGI1

Data Used In Plot   "label   USBR Observations   


Hydrograph plot for BIGI1

Data Used In Plot   "label   United States Geological Survey