US Bridges

Ia 25 over Iowa 25

Fair

Adair County, Iowa · At Jct. I-80 · Structure no. 000000000012990

Built
1958
67 years old, rebuilt 1972
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
214 ft
4 main spans
Daily traffic
23,600
2021 count
Owner
State
State Highway Agency

About this bridge

Ia 25 over Iowa 25 is a prestressed concrete stringer/multi-beam or girder carrying Ia 25 over Iowa 25 in Adair County, Iowa. It was built in 1958 and reconstructed in 1972, so it is 67 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 6 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 23,600 vehicles a day, roughly 41% of them trucks, projected to reach 23,600 by 2043. The structure is 214 ft (65.2 m) long and 36 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesIa 25
CrossesIowa 25
LocationAt Jct. I-80
RouteState Highway 25
CountyAdair County
StateIowa
Coordinates41.49566, -94.45256
Functional classRural Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating63.9 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length214 ft (65.2 m)
Longest span65 ft (19.8 m)
Deck width36 ft (11 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic23,600 (2021)
Projected traffic23,600 by 2043
Trucks41%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Ia 25 over Iowa 25 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1972.

What condition is Ia 25 over Iowa 25 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 February 2023.

How much traffic does Ia 25 over Iowa 25 carry?

About 23,600 vehicles per day (2021 count), of which roughly 41% are trucks.

How long is Ia 25 over Iowa 25?

The structure is 214 ft (65.2 m) long with a longest span of 65 ft (19.8 m) and a deck 36 ft wide.

Who owns Ia 25 over Iowa 25?

It is owned by the State Highway Agency.