US Bridges

Ia 10 over Little Sioux River

Fair

Clay County, Iowa · 0.5 Mi. E of W JCT SR M27 · Structure no. 000000000020410

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
355 ft
3 main spans
Daily traffic
1,030
2023 count
Owner
State
State Highway Agency

About this bridge

Ia 10 over Little Sioux River is a steel continuous stringer/multi-beam or girder carrying Ia 10 over Little Sioux River in Clay County, Iowa. It was built in 1970, so it is 55 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 1,030 vehicles a day, roughly 14% of them trucks, projected to reach 1,030 by 2043. The structure is 355 ft (108.2 m) long and 35 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesIa 10
CrossesLittle Sioux River
Location0.5 Mi. E of W JCT SR M27
RouteState Highway 10
CountyClay County
StateIowa
Coordinates42.92149, -95.35703
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.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length355 ft (108.2 m)
Longest span137 ft (41.8 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,030 (2023)
Projected traffic1,030 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 1970, making it 55 years old in 2025.

What condition is Ia 10 over Little Sioux 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 August 2023.

How much traffic does Ia 10 over Little Sioux River carry?

About 1,030 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is Ia 10 over Little Sioux River?

The structure is 355 ft (108.2 m) long with a longest span of 137 ft (41.8 m) and a deck 35 ft wide.

Who owns Ia 10 over Little Sioux River?

It is owned by the State Highway Agency.