US Bridges

I029 N over 233 ST

Good

Moody County, South Dakota · 2 N Sd 34 Interch · Structure no. 000000051066130

Built
1967
58 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete Continuous
Length
80 ft
3 main spans
Daily traffic
7,870
2024 count
Owner
State
State Highway Agency

About this bridge

I029 N over 233 ST is a concrete continuous slab carrying I029 N over 233 ST in Moody County, South Dakota. It was built in 1967, so it is 58 years old, older than the South Dakota average of 48.9 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 7,870 vehicles a day, roughly 22% of them trucks, projected to reach 11,915 by 2044. The structure is 80 ft (24.4 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI029 N
Crosses233 ST
Location2 N Sd 34 Interch
RouteInterstate 29
Coordinates44.00799, -96.75876
Functional classRural Principal Arterial - Interstate

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.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.6 US tons
Inventory rating47.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length80 ft (24.4 m)
Longest span28 ft (8.5 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,870 (2024)
Projected traffic11,915 by 2044
Trucks22%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I029 N over 233 ST built?

It was built in 1967, making it 58 years old in 2025.

What condition is I029 N over 233 ST 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 August 2024.

How much traffic does I029 N over 233 ST carry?

About 7,870 vehicles per day (2024 count), of which roughly 22% are trucks.

How long is I029 N over 233 ST?

The structure is 80 ft (24.4 m) long with a longest span of 28 ft (8.5 m) and a deck 41 ft wide.

Who owns I029 N over 233 ST?

It is owned by the State Highway Agency.