Major Flood
12 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.
Moderate Flood
11 ft
Minor Flood
10.5 ft
Action Stage
10 ft
What Floods at Each Level
12 ft
This is a major, life-threatening flood especially in the steep canyon immediately downstream of Green Mountain Reservoir. There is widespread inundation of low lying properties along the Blue River with extensive flooding of roads and bridges along and crossing the river.
11 ft
Moderate flooding will be especially dangerous in the steep canyon immediately downstream of Green Mountain Reservoir. Buildings near the river flood. Debris damming on the upriver side of bridges may result in flooding of bridge approaches.
10.5 ft
Ranchlands flood and structures begin to flood along the Blue River below Green Mountain Reservoir.
10 ft
Low lying areas flood along the Blue River below Green Mountain Reservoir.
9.2 ft
Without mitigation, water begins to impact low lying areas along the river.
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 11, 1995 | 10.85 ft | 4,040 cfs |
| Jun 30, 1984 | 10.22 ft | 3,460 cfs |
| Jul 7, 1957 | 10.13 ft | 3,520 cfs |
About This Gauge
USGS Site
NWS LID
BGMC2
River
Blue River (CO)
County
Summit, CO
Coordinates
39.8803°N, 106.3333°W
Get Flood Alerts for Blue River (CO)
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 Blue River (CO) below Green Mountain Reservoir?
The Blue River (CO) below Green Mountain Reservoir gauge is maintained by USGS (site 09057500) 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 Blue River (CO) below Green Mountain Reservoir?
The NWS-defined flood stage for Blue River (CO) below Green Mountain Reservoir is 10.5 feet. Action stage begins at 10 feet. Moderate flooding starts at 11 feet, and major flooding at 12 feet.
How do I get alerts when Blue River (CO) rises?
Download StormCast free on Google Play, go to River Gauges, and add Blue River (CO) below Green Mountain Reservoir 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 Blue River (CO) below Green Mountain Reservoir gauge located?
The gauge is located in Summit County, Colorado at coordinates 39.8803°N, 106.3333°W. USGS site number: 09057500. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Blue River (CO)
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey
- Gauge reading affected by reservoir operations.
- Stage may be affected by ice during winter months.