Iowa River near Lone Tree (Tri-County Bridge), IA
River level and flood forecast · Louisa County
Normal12.1 ftas of Mon 2 PM
The river is 3.9 ft below flood stage (16 ft).
Flow: 9,600 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 5, 9:59 AM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 22 ft |
| Moderate flood stage | 18.5 ft |
| Flood stage | 16 ft |
| Action stage | 14 ft |
| Record crest (June 15, 2008) | 23.1 ft |
What floods at each level
From the National Weather Service, highest first.
- 22 ftHills access is flooded.
- 20 ftWater reaches the bottom of the County Road W66 bridge deck.
- 19 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.
- 18.5 ftRiver Junction Access is flooded. Low lying rural roads are under water.
- 18 ftSand Road closes south of 520th Street to the Highway 22 intersection.
- 16 ftFlood waters affect parts of Lola Lane and Y Avenue. River Junction Access Park is closed.
- 15 ftWater nears low lying roads and reaches agricultural levees.
- 14 ftWater reaches the tops of the river banks.
Highest crests on record
- 23.1 ft — June 15, 2008
- 22.94 ft — July 7, 1993
- 22.13 ft — July 3, 2014
- 21.99 ft — April 19, 2013
- 20.39 ft — October 9, 2018
Recent crests: 15.56 ft (June 10, 2020) · 19.09 ft (March 15, 2019) · 20.39 ft (October 9, 2018) · 16.12 ft (September 7, 2018) · 15.78 ft (January 17, 2017)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (LNTI4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.