US Bridges

Ia 10 over Orange City Slough

Fair

Sioux County, Iowa · 4.5 Mi. E of US 75 · Structure no. 000000000048531

Built
1977
48 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete Continuous
Length
78 ft
3 main spans
Daily traffic
4,060
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 10 over Orange City Slough is a concrete continuous slab carrying Ia 10 over Orange City Slough in Sioux County, Iowa. It was built in 1977, so it is 48 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 4,060 vehicles a day, roughly 10% of them trucks, projected to reach 4,060 by 2044. The structure is 78 ft (23.8 m) long and 47 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesIa 10
CrossesOrange City Slough
Location4.5 Mi. E of US 75
RouteState Highway 10
StateIowa
Coordinates42.99761, -96.08619
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.5 US tons
Inventory rating29.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span29 ft (8.8 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,060 (2022)
Projected traffic4,060 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Orange City Slough built?

It was built in 1977, making it 48 years old in 2025.

What condition is Ia 10 over Orange City Slough 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 June 2024.

How much traffic does Ia 10 over Orange City Slough carry?

About 4,060 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is Ia 10 over Orange City Slough?

The structure is 78 ft (23.8 m) long with a longest span of 29 ft (8.8 m) and a deck 47 ft wide.

Who owns Ia 10 over Orange City Slough?

It is owned by the State Highway Agency.