Major Flood
22 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
18.5 ft
Minor Flood
16 ft
Action Stage
14 ft
What Floods at Each Level
22 ft
Hills access is flooded.
20 ft
Water reaches the bottom of the County Road W66 bridge deck.
19 ft
Tri-County Bridge is closed as there is no access from the east side due to the roadway being flooded. Homes on Lola Lane, Y Avenue and near the Tri-County Bridge are affected as access is cut off due to flooded roads.
18.5 ft
River Junction Access is flooded. Low lying rural roads are under water.
18 ft
Sand Road closes south of 520th Street to the Highway 22 intersection.
16 ft
Flood waters affect parts of Lola Lane and Y Avenue. River Junction Access Park is closed.
15 ft
Water nears low lying roads and reaches agricultural levees.
14 ft
Water reaches the tops of the river banks.
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 |
|---|---|---|
| Jun 14, 2008 | 23.1 ft | 53,700 cfs |
| Jul 6, 1993 | 22.94 ft | 57,100 cfs |
| Jul 3, 2014 | 22.13 ft | 46,600 cfs |
About This Gauge
Get Flood Alerts for Iowa River
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 Iowa River near Lone Tree (Tri-County Bridge)?
The Iowa River near Lone Tree (Tri-County Bridge) gauge is maintained by USGS (site 05455700) 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 Iowa River near Lone Tree (Tri-County Bridge)?
The NWS-defined flood stage for Iowa River near Lone Tree (Tri-County Bridge) is 16 feet. Action stage begins at 14 feet. Moderate flooding starts at 18.5 feet, and major flooding at 22 feet.
How do I get alerts when Iowa River rises?
Download StormCast free on Google Play, go to River Gauges, and add Iowa River near Lone Tree (Tri-County Bridge) 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 Iowa River near Lone Tree (Tri-County Bridge) gauge located?
The gauge is located in Louisa County, Iowa at coordinates 41.4238°N, 91.4785°W. USGS site number: 05455700. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: U.S. Geological Survey, Observations courtesy of U.S. Geological Survey, Observations courtesy of U.S. Army Corps of Engineers
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.