US Bridges

US 20 EB over Iowa River RR

Good

Hardin County, Iowa · 0.4 MI West of JCT SR S56 · Structure no. 000000000607910

Built
2003
22 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
218 ft
3 main spans
Daily traffic
4,500
2022 count
Owner
State
State Highway Agency

About this bridge

US 20 EB over Iowa River RR is a prestressed concrete stringer/multi-beam or girder carrying US 20 EB over Iowa River RR in Hardin County, Iowa. It was built in 2003, so it is 22 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,500 vehicles a day, roughly 30% of them trucks, projected to reach 4,500 by 2044. The structure is 218 ft (66.4 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 20 EB
CrossesIowa River RR
Location0.4 MI West of JCT SR S56
RouteU.S. Route 20
CountyHardin County
StateIowa
Coordinates42.45303, -93.05801
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.2 US tons
Inventory rating41.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length218 ft (66.4 m)
Longest span82 ft (25 m)
Deck width68 ft (20.6 m)
Roadway width65 ft (19.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2022)
Projected traffic4,500 by 2044
Trucks30%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 20 EB over Iowa River RR built?

It was built in 2003, making it 22 years old in 2025.

What condition is US 20 EB over Iowa River RR 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 September 2024.

How much traffic does US 20 EB over Iowa River RR carry?

About 4,500 vehicles per day (2022 count), of which roughly 30% are trucks.

How long is US 20 EB over Iowa River RR?

The structure is 218 ft (66.4 m) long with a longest span of 82 ft (25 m) and a deck 68 ft wide.

Who owns US 20 EB over Iowa River RR?

It is owned by the State Highway Agency.