SD044 over I029

Fair

Lincoln County, South Dakota · Sd 44 Interchange · Structure no. 000000042065120

Built: 1958; 67 years old
Condition: Fair; inspected July 2023
Type: Slab; Concrete Continuous
Length: 254 ft; 4 main spans
Daily traffic: 2,288; 2024 count
Owner: State; State Highway Agency

About this bridge

SD044 over I029 is a concrete continuous slab carrying SD044 over I029 in Lincoln County, South Dakota. It was built in 1958, so it is 67 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 5 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 2,288 vehicles a day, roughly 14% of them trucks, projected to reach 3,874 by 2044. The structure is 254 ft (77.4 m) long and 34 ft wide.

Location

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CarriesSD044

CrossesI029

LocationSd 44 Interchange

RouteState Highway 44

CountyLincoln County

StateSouth Dakota

Coordinates43.3303, -96.79598

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.

Component	Rating	Meaning
Deck	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.

Last inspectionJuly 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourBridge not over waterway

Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is

Deck geometry4: Meets minimum tolerable limits to be left in place as is

Approach roadway alignment7: Better than present minimum criteria

Operating rating53.2 US tons

Inventory rating31.7 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans4

Design loadHS 20

Structure length254 ft (77.4 m)

Longest span64 ft (19.5 m)

Deck width34 ft (10.5 m)

Roadway width30 ft (9.1 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,288 (2024)

Projected traffic3,874 by 2044

Trucks14%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesHighway

Detour if closed—

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—

NavigationNot applicable (no waterway)

Frequently asked questions

When was SD044 over I029 built?

It was built in 1958, making it 67 years old in 2025.

What condition is SD044 over I029 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 2023.

How much traffic does SD044 over I029 carry?

About 2,288 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is SD044 over I029?

The structure is 254 ft (77.4 m) long with a longest span of 64 ft (19.5 m) and a deck 34 ft wide.

Who owns SD044 over I029?

It is owned by the State Highway Agency.