Iowa River near Lone Tree (Tri-County Bridge)

1. 22.00 ftHills access is flooded.
2. 20.00 ftWater reaches the bottom of the County Road W66 bridge deck.
3. 19.00 ftTri-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.
4. 18.50 ftRiver Junction Access is flooded. Low lying rural roads are under water.
5. 18.00 ftSand Road closes south of 520th Street to the Highway 22 intersection.
6. 16.00 ftFlood waters affect parts of Lola Lane and Y Avenue. River Junction Access Park is closed.
7. 15.00 ftWater nears low lying roads and reaches agricultural levees.
8. 14.00 ftWater reaches the tops of the river banks.

Chance of flooding, September to November

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 25, 2026.

Most recent crests

• June 10, 2020: 15.56 ft
• March 15, 2019: 19.09 ft
• October 9, 2018: 20.39 ft
• September 7, 2018: 16.12 ft
• January 17, 2017: 15.78 ft
• December 16, 2015: 16.38 ft
• August 12, 2015: 14.71 ft
• July 3, 2014: 22.13 ft
• April 19, 2013: 21.99 ft
• May 4, 2012: 11.81 ft

• UpstreamIowa River at Iowa City
• DownstreamIowa River at Columbus Jct
• Cedar River at Conesville
• English River at Kalona
• Old Mans Creek at Iowa City
• South Branch Ralston Creek at Iowa City
• Clear Creek (IA) at Coralville
• Rapid Creek (IA) at Iowa City

Forecasts by the North Central River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available. 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.

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.