US Bridges

FM K-25(N) over I-29

Fair

Woodbury County, Iowa · 4.7 Mi. S of Jct. US 20 · Structure no. 000000000053670

Built
1959
66 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
210 ft
4 main spans
Daily traffic
1,416
2022 count
Owner
State
State Highway Agency

About this bridge

FM K-25(N) over I-29 is a prestressed concrete stringer/multi-beam or girder carrying FM K-25(N) over I-29 in Woodbury County, Iowa. It was built in 1959, so it is 66 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 1,416 vehicles a day, projected to reach 1,416 by 2043. The structure is 210 ft (64 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFM K-25(N)
CrossesI-29
Location4.7 Mi. S of Jct. US 20
RouteCounty Highway 0
CountyWoodbury County
StateIowa
Coordinates42.3816, -96.35867
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.1 US tons
Inventory rating15.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length210 ft (64 m)
Longest span65 ft (19.8 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,416 (2022)
Projected traffic1,416 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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 FM K-25(N) over I-29 built?

It was built in 1959, making it 66 years old in 2025.

What condition is FM K-25(N) over I-29 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 September 2023.

How much traffic does FM K-25(N) over I-29 carry?

About 1,416 vehicles per day (2022 count).

How long is FM K-25(N) over I-29?

The structure is 210 ft (64 m) long with a longest span of 65 ft (19.8 m) and a deck 29 ft wide.

Who owns FM K-25(N) over I-29?

It is owned by the State Highway Agency.