US Bridges

Ia 25 over Iais RR

Fair

Guthrie County, Iowa · 0.7 E of W JCT of SR F-65 · Structure no. 000000000026031

Built
1973
52 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
192 ft
3 main spans
Daily traffic
1,330
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 25 over Iais RR is a prestressed concrete stringer/multi-beam or girder carrying Ia 25 over Iais RR in Guthrie County, Iowa. It was built in 1973, so it is 52 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 1,330 vehicles a day, roughly 23% of them trucks, projected to reach 1,330 by 2044. The structure is 192 ft (58.5 m) long and 39 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIa 25
CrossesIais RR
Location0.7 E of W JCT of SR F-65
RouteState Highway 25
CountyGuthrie County
StateIowa
Coordinates41.51824, -94.47276
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.4 US tons
Inventory rating41.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span65 ft (19.8 m)
Deck width39 ft (12 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,330 (2022)
Projected traffic1,330 by 2044
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

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 Iais RR built?

It was built in 1973, making it 52 years old in 2025.

What condition is Ia 25 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 February 2024.

How much traffic does Ia 25 over Iais RR carry?

About 1,330 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is Ia 25 over Iais RR?

The structure is 192 ft (58.5 m) long with a longest span of 65 ft (19.8 m) and a deck 39 ft wide.

Who owns Ia 25 over Iais RR?

It is owned by the State Highway Agency.