Major Flood
109 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
108 ft
Minor Flood
106 ft
Action Stage
104 ft
What Floods at Each Level
109 ft
Major floodplain inundation in vicinity of Elsie Allen High School and possibly elsewhere along Colgan Creek near Santa Rosa. Bellevue Avenue also heavily inundated by flood waters and possibly impassable by vehicle and foot traffic. Roadway and sidewalk manhole covers may be backpressured and missing.
108 ft
Adjacent maintenance road on north (right bank) side of channel flooded. Culvert that serves Colgan Creek beneath Burgess Drive fully submerged and likely backwatered. Channel banks overtopped and Elsie Allen ballfield begins to flood. NWS will issue a Flash Flood Warning, if not yet already issued.
106 ft
Adjacent maintenance road on north (right bank) side of channel flooded downstream of Burgess Drive bridge. Creek water levels have reached the elevation of storm drains serving runoff on Bellevue Avenue, so evacuation of runoff from the roadway and sidewalk may be limited or halted. Resultant roadway runoff may build up, causing localized urban roadway flooding. NWS will issue an Urban/Small Stream Advisory, if not yet already issued.
104 ft
Monitor stage. Many adjacent storm drain outlets within the creek channel that serve surrounding floodplain and roadways in the vicinity of Elsie Allen High School are submerged and may begin to backwater. NWS may issue a Flash Flood Watch, if not yet already issued.
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
Get Flood Alerts for Colgan Creek
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 Colgan Creek near Santa Rosa?
The Colgan Creek near Santa Rosa gauge is maintained by USGS (site 11465690) 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 Colgan Creek near Santa Rosa?
The NWS-defined flood stage for Colgan Creek near Santa Rosa is 106 feet. Action stage begins at 104 feet. Moderate flooding starts at 108 feet, and major flooding at 109 feet.
How do I get alerts when Colgan Creek rises?
Download StormCast free on Google Play, go to River Gauges, and add Colgan Creek near Santa Rosa 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 Colgan Creek near Santa Rosa gauge located?
The gauge is located in Sonoma County, California at coordinates 38.4021°N, 122.7330°W. USGS site number: 11465690. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Colgan Creek
More Resources
Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey