US Bridges

Ia 92 over ST Josephs Creek

Good

Mahaska County, Iowa · 3.7 Mi. E of Jct. SR T25 · Structure no. 000000000603880

Built
1979
46 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
3,240
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 92 over ST Josephs Creek is a concrete continuous culvert carrying Ia 92 over ST Josephs Creek in Mahaska County, Iowa. It was built in 1979, so it is 46 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,240 vehicles a day, roughly 18% of them trucks, projected to reach 3,240 by 2044. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 11.2 mi (18 km).

CarriesIa 92
CrossesST Josephs Creek
Location3.7 Mi. E of Jct. SR T25
RouteState Highway 92
StateIowa
Coordinates41.30385, -92.81527
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating88.1 US tons
Inventory rating52.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,240 (2022)
Projected traffic3,240 by 2044
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 ST Josephs Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is Ia 92 over ST Josephs Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does Ia 92 over ST Josephs Creek carry?

About 3,240 vehicles per day (2022 count), of which roughly 18% are trucks.

How long is Ia 92 over ST Josephs Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns Ia 92 over ST Josephs Creek?

It is owned by the State Highway Agency.