Ia 9 over Osterman Creek

Fair

Osceola County, Iowa · 3.4 Mi. E of Jct. US 59 · Structure no. 000000000038501

Built: 1978; 47 years old
Condition: Fair; inspected September 2024
Type: Slab; Concrete Continuous
Length: 123 ft; 3 main spans
Daily traffic: 2,020; 2022 count
Owner: State; State Highway Agency

About this bridge

Ia 9 over Osterman Creek is a concrete continuous slab carrying Ia 9 over Osterman Creek in Osceola County, Iowa. It was built in 1978, so it is 47 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 2,020 vehicles a day, roughly 20% of them trucks, projected to reach 2,020 by 2044. The structure is 123 ft (37.5 m) long and 47 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesIa 9

CrossesOsterman Creek

Location3.4 Mi. E of Jct. US 59

RouteState Highway 9

CountyOsceola County

StateIowa

Coordinates43.43206, -95.57625

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.

Component	Rating	Meaning
Deck	6 Satisfactory	Structural elements show some minor deterioration.
Superstructure	6 Satisfactory	Structural elements show some minor deterioration.
Substructure	7 Good	Some minor problems.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionSeptember 2024

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour within limits of footing or piles

Structural evaluation6: Equal to present minimum criteria

Deck geometry7: Better than present minimum criteria

Waterway adequacy6: Equal to present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating61.4 US tons

Inventory rating27.6 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadHS 20

Structure length123 ft (37.5 m)

Longest span47 ft (14.3 m)

Deck width47 ft (14.4 m)

Roadway width44 ft (13.4 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,020 (2022)

Projected traffic2,020 by 2044

Trucks20%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed3.7 mi (6 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—

NavigationNo navigation control on waterway

Frequently asked questions

When was Ia 9 over Osterman Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Ia 9 over Osterman Creek 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 2024.

How much traffic does Ia 9 over Osterman Creek carry?

About 2,020 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is Ia 9 over Osterman Creek?

The structure is 123 ft (37.5 m) long with a longest span of 47 ft (14.3 m) and a deck 47 ft wide.

Who owns Ia 9 over Osterman Creek?

It is owned by the State Highway Agency.