US Bridges

HWY 941 over Iowa River

Fair

Hardin County, Iowa · 089211713 · Structure no. 000000000026980

Built
1932
93 years old, rebuilt 1982
Condition
Fair
inspected January 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
146 ft
2 main spans
Daily traffic
2,357
2022 count
Owner
County
County Highway Agency

About this bridge

HWY 941 over Iowa River is a steel continuous girder and floorbeam system carrying HWY 941 over Iowa River in Hardin County, Iowa. It was built in 1932 and reconstructed in 1982, so it is 93 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,357 vehicles a day, roughly 16% of them trucks, projected to reach 2,357 by 2044. The structure is 146 ft (44.5 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY 941
CrossesIowa River
Location089211713
RouteCounty Highway 0
CountyHardin County
StateIowa
Coordinates42.51581, -93.34713
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.6 US tons
Inventory rating50.6 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length146 ft (44.5 m)
Longest span70 ft (21.3 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,357 (2022)
Projected traffic2,357 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.8 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 941 over Iowa River built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1982.

What condition is HWY 941 over Iowa River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does HWY 941 over Iowa River carry?

About 2,357 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is HWY 941 over Iowa River?

The structure is 146 ft (44.5 m) long with a longest span of 70 ft (21.3 m) and a deck 26 ft wide.

Who owns HWY 941 over Iowa River?

It is owned by the County Highway Agency.