Rivers in Idaho
Big Lost River below Mackay Reservoir
Below flood stage
2.22ftStage
Observed Sat, Sep 26, 9:45 AM MDT
- Flood stage
- 4.30 ft
- Forecast crest
- 2.24 ftSat, Sep 26, 12:00 PM MDT
- Record crest
- 6.08 ft1986
Flood stages and impacts
| Category | Stage |
|---|---|
| Minor flood | 4.30 ft |
| Action | 3.80 ft |
- 4.30 ftLowland flooding below Mackay Dam through the Darlington Flats. US Highway 93 may be impacted at the curve by Leslie between 3900 North and 4050 North.
- 3.80 ftNear bankfull from Mackay Dam through the Darlington Flats. Water is likely to start to seep in low-lying areas in the Darlington Flats.
Crest history
22 crests on NOAA’s list since 1921.
| # | Date | Stage |
|---|---|---|
| 1 | June 6, 1986 | 6.08 ft |
| 2 | June 17, 1974 | 5.93 ft |
| 3 | June 14, 1965 | 5.89 ft |
| 4 | June 10, 1921 | 5.79 ft |
| 5 | May 26, 1958 | 5.65 ft |
| 6 | June 30, 1982 | 5.65 ft |
| 7 | June 9, 2006 | 5.52 ft |
| 8 | June 10, 2017 | 5.09 ft |
| 9 | May 27, 2018 | 4.95 ft |
| 10 | June 30, 2011 | 4.77 ft |
| 11 | June 21, 2009 | 4.64 ft |
| 12 | June 28, 2010 | 4.44 ft |
| 13 | June 17, 2019 | 4.19 ft |
| 14 | May 30, 2005 | 4.07 ft |
| 15 | June 5, 2012 | 4.05 ft |
| 16 | June 9, 2016 | 3.91 ft |
| 17 | June 11, 2013 | 3.30 ft |
| 18 | June 24, 2008 | 3.29 ft |
| 19 | June 10, 2015 | 3.15 ft |
| 20 | June 6, 2014 | 3.12 ft |
| 21 | May 15, 2007 | 2.87 ft |
| 22 | June 7, 2020 | 2.78 ft |
Most recent crests
- June 7, 2020: 2.78 ft
- June 17, 2019: 4.19 ft
- May 27, 2018: 4.95 ft
- June 10, 2017: 5.09 ft
- June 9, 2016: 3.91 ft
- June 10, 2015: 3.15 ft
- June 6, 2014: 3.12 ft
- June 11, 2013: 3.30 ft
- June 5, 2012: 4.05 ft
- June 30, 2011: 4.77 ft
Nearby
Upstream, downstream and the gauges around this one.
- UpstreamEastern Idaho Reservoirs at Mackay Dam
- DownstreamBig Lost River at Arco
- Lower Cedar Creek at Divs Nr Mackay
- Big Lost River at Leslie
- Thousand Springs Creek at Chilly
- Antelope Creek (ID) at Darlington
- Big Lost River at Moore Div Nr Moore
- Big Lost River at Howell Ranch
- North Fork Big Lost River at Wild Horse
What this means
Forecasts by the Northwest River Forecast Center. Forecasts are issued routinely year-round. Stage may be affected by ice during winter months.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.