US Bridges

I029 S over 250 ST

Fair

Minnehaha County, South Dakota · Baltic Interchange · Structure no. 000000050175060

Built
1963
62 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
119 ft
3 main spans
Daily traffic
10,375
2024 count
Owner
State
State Highway Agency

About this bridge

I029 S over 250 ST is a concrete continuous slab carrying I029 S over 250 ST in Minnehaha County, South Dakota. It was built in 1963, so it is 62 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 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 10,375 vehicles a day, roughly 16% of them trucks, projected to reach 15,614 by 2044. The structure is 119 ft (36.3 m) long and 42 ft wide.

CarriesI029 S
Crosses250 ST
LocationBaltic Interchange
RouteInterstate 29
Coordinates43.76126, -96.78146
Functional classRural Principal Arterial - Interstate

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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.6 US tons
Inventory rating44.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length119 ft (36.3 m)
Longest span43 ft (13.1 m)
Deck width42 ft (12.9 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,375 (2024)
Projected traffic15,614 by 2044
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 S over 250 ST built?

It was built in 1963, making it 62 years old in 2025.

What condition is I029 S over 250 ST 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 July 2024.

How much traffic does I029 S over 250 ST carry?

About 10,375 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is I029 S over 250 ST?

The structure is 119 ft (36.3 m) long with a longest span of 43 ft (13.1 m) and a deck 42 ft wide.

Who owns I029 S over 250 ST?

It is owned by the State Highway Agency.