US Bridges

IRR I029 over Indian Rv

Fair

Grant County, South Dakota · 4.6 N Codington CO Line · Structure no. 000000026085074

Built
1976
49 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
6,600
2023 count
Owner
State
State Highway Agency

About this bridge

IRR I029 over Indian Rv is a concrete continuous culvert carrying IRR I029 over Indian Rv in Grant County, South Dakota. It was built in 1976, so it is 49 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 6,600 vehicles a day, roughly 22% of them trucks, projected to reach 8,158 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesIRR I029
CrossesIndian Rv
Location4.6 N Codington CO Line
RouteInterstate 29
CountyGrant County
StateSouth Dakota
Coordinates45.21867, -97.05089
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating90.4 US tons
Inventory rating54.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length22 ft (6.7 m)
Longest span10 ft (3.2 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,600 (2023)
Projected traffic8,158 by 2043
Trucks22%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR I029 over Indian Rv built?

It was built in 1976, making it 49 years old in 2025.

What condition is IRR I029 over Indian Rv 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 November 2024.

How much traffic does IRR I029 over Indian Rv carry?

About 6,600 vehicles per day (2023 count), of which roughly 22% are trucks.

How long is IRR I029 over Indian Rv?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.2 m).

Who owns IRR I029 over Indian Rv?

It is owned by the State Highway Agency.