RIVER GAUGE · BIG LOST RIVER
Big Lost River above INL Diversion at Head near Arco
Butte County, Idaho
Water level47.98 ft
Flow—
Last readingSep 2, 2026, 7:45 PM UTC (last recorded)
Action51.5 ft181 cfs
The past week
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What floods at each level
- 51.5 ft
Water flowing through this point will pass into the INL settling ponds.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Jun 8, 1986 | 4.3 ft | 1,290 cfs |
More on Big Lost River
UpstreamBig Lost River near Arco
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