US Bridges

River ST over Iowa River

Fair

Hardin County, Iowa · 000000000 · Structure no. 000000000006610

Built
1922
103 years old, rebuilt 1984
Condition
Fair
inspected May 2024
Type
Arch - Deck
Concrete
Length
180 ft
1 main span
Daily traffic
1,698
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

River ST over Iowa River is a concrete arch - deck carrying River ST over Iowa River in Hardin County, Iowa. It was built in 1922 and reconstructed in 1984, so it is 103 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 1,698 vehicles a day, projected to reach 1,698 by 2044. The structure is 180 ft (54.9 m) long and 45 ft wide.

Location

Open in Google Maps
CarriesRiver ST
CrossesIowa River
Location000000000
RouteCity Street 0
CountyHardin County
StateIowa
Coordinates42.51738, -93.26845
Functional classUrban Minor Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.6 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span140 ft (42.7 m)
Deck width45 ft (13.7 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,698 (2022)
Projected traffic1,698 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$980,000
NavigationNo navigation control on waterway

Frequently asked questions

When was River ST over Iowa River built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1984.

What condition is River ST 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 May 2024.

How much traffic does River ST over Iowa River carry?

About 1,698 vehicles per day (2022 count).

How long is River ST over Iowa River?

The structure is 180 ft (54.9 m) long with a longest span of 140 ft (42.7 m) and a deck 45 ft wide.

Who owns River ST over Iowa River?

It is owned by the City or Municipal Highway Agency.