US Bridges

Ia 10 over Little Sioux River

Good

O'Brien County, Iowa · 2.1 Mi. E of E JCT SR M12 · Structure no. 000000000038381

Built
1989
36 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
390 ft
4 main spans
Daily traffic
590
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 10 over Little Sioux River is a prestressed concrete stringer/multi-beam or girder carrying Ia 10 over Little Sioux River in O'Brien County, Iowa. It was built in 1989, so it is 36 years old, younger 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 590 vehicles a day, roughly 24% of them trucks, projected to reach 590 by 2043. The structure is 390 ft (118.9 m) long and 39 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesIa 10
CrossesLittle Sioux River
Location2.1 Mi. E of E JCT SR M12
RouteState Highway 10
StateIowa
Coordinates42.93011, -95.43199
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.8 US tons
Inventory rating41.4 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length390 ft (118.9 m)
Longest span97 ft (29.6 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic590 (2023)
Projected traffic590 by 2043
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 10 over Little Sioux River built?

It was built in 1989, making it 36 years old in 2025.

What condition is Ia 10 over Little Sioux River 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 10 over Little Sioux River carry?

About 590 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is Ia 10 over Little Sioux River?

The structure is 390 ft (118.9 m) long with a longest span of 97 ft (29.6 m) and a deck 39 ft wide.

Who owns Ia 10 over Little Sioux River?

It is owned by the State Highway Agency.