Iowa River near Lone Tree (Tri-County Bridge)
Critical Stages
14' - Action
16' - Flood
18.5' - Moderate
22' - Major
Latest Observation
Updated: 2:00 PM CST 12/17/25
Status: No Flooding
Stage: 5.55 ft
Flow: 1.21 kcfs
Forecast
Forecast not available for this location.
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 3:00 PM 12/17 | 5.51 | 1.18 |
| 2:45 PM 12/17 | 5.52 | 1.19 |
| 2:30 PM 12/17 | 5.53 | 1.19 |
| 2:15 PM 12/17 | 5.53 | 1.19 |
| 2:00 PM 12/17 | 5.55 | 1.21 |
| 1:45 PM 12/17 | 5.55 | 1.21 |
| 1:30 PM 12/17 | 5.56 | 1.22 |
| 1:15 PM 12/17 | 5.57 | 1.22 |
| 1:00 PM 12/17 | 5.57 | 1.22 |
| 12:45 PM 12/17 | 5.57 | 1.22 |
| 12:30 PM 12/17 | 5.57 | 1.22 |
| 12:15 PM 12/17 | 5.59 | 1.24 |
| 12:00 PM 12/17 | 5.59 | 1.24 |
| 11:45 AM 12/17 | 5.59 | 1.24 |
| 11:30 AM 12/17 | 5.59 | 1.24 |
| 11:15 AM 12/17 | 5.6 | 1.25 |
| 11:00 AM 12/17 | 5.59 | 1.24 |
| 10:45 AM 12/17 | 5.6 | 1.25 |
| 10:30 AM 12/17 | 5.61 | 1.25 |
| 10:15 AM 12/17 | 5.6 | 1.25 |
| 10:00 AM 12/17 | 5.61 | 1.25 |
| 9:45 AM 12/17 | 5.61 | 1.25 |
| 9:30 AM 12/17 | 5.62 | 1.26 |
| 9:15 AM 12/17 | 5.63 | 1.27 |
| 9:00 AM 12/17 | 5.63 | 1.27 |
| 8:45 AM 12/17 | 5.64 | 1.28 |
| 8:30 AM 12/17 | 5.65 | 1.28 |
| 8:15 AM 12/17 | 5.64 | 1.28 |
| 8:00 AM 12/17 | 5.65 | 1.28 |
| 7:45 AM 12/17 | 5.65 | 1.28 |
22' -
Major Flood Stage. Hills access is flooded.
20' -
Water reaches the bottom of the County Road W66 bridge deck.
19' -
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' -
Moderate Flood Stage: River Junction Access is flooded. Low lying rural roads are under water.
18' -
Sand Road closes south of 520th Street to the Highway 22 intersection.
16' -
Flood Stage. Flood waters affect parts of Lola Lane and Y Avenue. River Junction Access Park is closed.
15' -
Water nears low lying roads and reaches agricultural levees.
14' -
Water reaches the tops of the river banks.
| Date | Stage (ft) |
|---|---|
| Jun 15, 2008 | 23.1 |
| Jul 7, 1993 | 22.94 |
| Jul 3, 2014 | 22.13 |
| Apr 19, 2013 | 21.99 |
| Oct 9, 2018 | 20.39 |
| Sep 22, 1965 | 20.27 |
| May 25, 1944 | 19.94 |
| Mar 15, 2019 | 19.09 |
| May 19, 1974 | 18.97 |
| May 11, 1996 | 18.44 |
| Feb 21, 1971 | 18.38 |
| Jun 20, 1990 | 18.08 |
| Apr 1, 1960 | 17.9 |
| Mar 10, 2009 | 17.8 |
| Mar 21, 1962 | 17.68 |
| Aug 5, 2010 | 17.68 |
| Feb 21, 1997 | 17.32 |
| Jan 19, 1973 | 17.08 |
| Feb 18, 2011 | 17.05 |
| Mar 20, 1979 | 17.01 |
Data provided by the National Weather Service.
