US Bridges

US 6 & Ia 38 over Iais RR

Fair

Muscatine County, Iowa · 1.2 Mi. E of Jct. Ia 38 · Structure no. 000000000037900

Built
1930
95 years old, rebuilt 1965
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
171 ft
3 main spans
Daily traffic
5,200
2022 count
Owner
State
State Highway Agency

About this bridge

US 6 & Ia 38 over Iais RR is a concrete continuous slab carrying US 6 & Ia 38 over Iais RR in Muscatine County, Iowa. It was built in 1930 and reconstructed in 1965, so it is 95 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 5,200 vehicles a day, roughly 12% of them trucks, projected to reach 5,200 by 2042. The structure is 171 ft (52.1 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesUS 6 & Ia 38
CrossesIais RR
Location1.2 Mi. E of Jct. Ia 38
RouteU.S. Route 6
CountyMuscatine County
StateIowa
Coordinates41.58344, -91.03821
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58.6 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span65 ft (19.8 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,200 (2022)
Projected traffic5,200 by 2042
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 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 6 & Ia 38 over Iais RR built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1965.

What condition is US 6 & Ia 38 over Iais RR 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 March 2023.

How much traffic does US 6 & Ia 38 over Iais RR carry?

About 5,200 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is US 6 & Ia 38 over Iais RR?

The structure is 171 ft (52.1 m) long with a longest span of 65 ft (19.8 m) and a deck 36 ft wide.

Who owns US 6 & Ia 38 over Iais RR?

It is owned by the State Highway Agency.