US Bridges

Main ST over Iowa River

Good

Hardin County, Iowa · 089211800 · Structure no. 000000000000111

Built
2023
2 years old
Condition
Good
inspected January 2024
Type
Slab
Concrete Continuous
Length
168 ft
4 main spans
Daily traffic
1,858
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Main ST over Iowa River is a concrete continuous slab carrying Main ST over Iowa River in Hardin County, Iowa. It was built in 2023, so it is 2 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,858 vehicles a day, projected to reach 1,858 by 2044. The structure is 168 ft (51.2 m) long and 37 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesMain ST
CrossesIowa River
Location089211800
RouteCity Street 0
CountyHardin County
StateIowa
Coordinates42.52065, -93.37594
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHL 93
Structure length168 ft (51.2 m)
Longest span47 ft (14.3 m)
Deck width37 ft (11.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,858 (2022)
Projected traffic1,858 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Main ST over Iowa River built?

It was built in 2023, making it 2 years old in 2025.

What condition is Main ST over Iowa River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does Main ST over Iowa River carry?

About 1,858 vehicles per day (2022 count).

How long is Main ST over Iowa River?

The structure is 168 ft (51.2 m) long with a longest span of 47 ft (14.3 m) and a deck 37 ft wide.

Who owns Main ST over Iowa River?

It is owned by the City or Municipal Highway Agency.