Minor Flood
6.5 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Action Stage
5.5 ft
What Floods at Each Level
6.5 ft
Widespread lowland flooding probable from Darlington/Moore areas downriver to the INL Complex boundary. Bank erosion possible. Bridges along US HWY 93 may have water near their base.
5.5 ft
Big Lost River within 1 foot of bankfull in many locations between Darlington/Moore areas to the INL Complex boundary. Some minor lowland flooding and ponding of water may occur. Isolated erosion possible along James Creek south of the Moore bridge.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jul 4, 1967 | 7.68 ft | 1,890 cfs |
| Jul 11, 1983 | 7.32 ft | 1,820 cfs |
| Jun 8, 1986 | 7.26 ft | 1,860 cfs |
About This Gauge
Get Flood Alerts for Big Lost River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Big Lost River near Arco?
The Big Lost River near Arco gauge is maintained by USGS (site 13132500) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Big Lost River near Arco?
The NWS-defined flood stage for Big Lost River near Arco is 6.5 feet. Action stage begins at 5.5 feet. Moderate flooding starts at N/A feet, and major flooding at N/A feet.
How do I get alerts when Big Lost River rises?
Download StormCast free on Google Play, go to River Gauges, and add Big Lost River near Arco to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Big Lost River near Arco gauge located?
The gauge is located in Butte County, Idaho at coordinates 43.5823°N, 113.2706°W. USGS site number: 13132500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Big Lost River
On This River
Upstream: Big Lost River below Mackay Reservoir
Downstream: Big Lost River at Lincoln Bridge INL Complex
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice during winter months.