Action Stage
65.7 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.
What Floods at Each Level
66.5 ft
102 percent Full Maximum Level
65.7 ft
100 percent Full
64.8 ft
97 percent Full
64.2 ft
95 percent Full
63.2 ft
92 percent Full
61.5 ft
90 percent Full
60.8 ft
87 percent Full
59.6 ft
80 percent Full
55.9 ft
70 percent Full
51.9 ft
60 percent Full
47.5 ft
50 percent Full
42.5 ft
40 percent Full
36.8 ft
30 percent Full
30.2 ft
20 percent Full
21.6 ft
10 percent Full
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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About This Gauge
USGS Site
NWS LID
MACI1
River
Eastern Idaho Reservoirs
County
Custer, ID
Coordinates
43.9517°N, 113.6747°W
Get Flood Alerts for Eastern Idaho Reservoirs
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 Eastern Idaho Reservoirs at Mackay Dam?
The Eastern Idaho Reservoirs at Mackay Dam gauge is maintained by USGS (site 13126000) 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 Eastern Idaho Reservoirs at Mackay Dam?
This gauge has NWS-defined flood categories. Check the flood stages section above for current thresholds.
How do I get alerts when Eastern Idaho Reservoirs rises?
Download StormCast free on Google Play, go to River Gauges, and add Eastern Idaho Reservoirs at Mackay Dam 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 Eastern Idaho Reservoirs at Mackay Dam gauge located?
The gauge is located in Custer County, Idaho at coordinates 43.9517°N, 113.6747°W. USGS site number: 13126000. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Eastern Idaho Reservoirs
Eastern Idaho Reservoirs at American Falls
Eastern Idaho Reservoirs at Henrys Lake
Eastern Idaho Reservoirs at Island Park
Eastern Idaho Reservoirs at Little Wood Reservoir
Eastern Idaho Reservoirs at Magic Dam
Eastern Idaho Reservoirs at Minidoka Dam
Eastern Idaho Reservoirs at Palisades
Eastern Idaho Reservoirs at Ririe Dam
On This River
More Resources
Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey