US Bridges

Ia 92 over South Skunk River

Fair

Mahaska County, Iowa · 2.2 Mi. W of W JCT SR V13 · Structure no. 000000000035021

Built
1985
40 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
453 ft
5 main spans
Daily traffic
2,900
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 92 over South Skunk River is a prestressed concrete stringer/multi-beam or girder carrying Ia 92 over South Skunk River in Mahaska County, Iowa. It was built in 1985, so it is 40 years old, younger 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 2,900 vehicles a day, roughly 12% of them trucks, projected to reach 2,900 by 2043. The structure is 453 ft (138.1 m) long and 43 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesIa 92
CrossesSouth Skunk River
Location2.2 Mi. W of W JCT SR V13
RouteState Highway 92
CountyMahaska County
StateIowa
Coordinates41.31166, -92.51421
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.1 US tons
Inventory rating47.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length453 ft (138.1 m)
Longest span97 ft (29.6 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,900 (2023)
Projected traffic2,900 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 92 over South Skunk River built?

It was built in 1985, making it 40 years old in 2025.

What condition is Ia 92 over South Skunk River 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 2024.

How much traffic does Ia 92 over South Skunk River carry?

About 2,900 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Ia 92 over South Skunk River?

The structure is 453 ft (138.1 m) long with a longest span of 97 ft (29.6 m) and a deck 43 ft wide.

Who owns Ia 92 over South Skunk River?

It is owned by the State Highway Agency.