IRR SD1806 over Burlington Northern RR
FairCorson County, South Dakota · 3.0 N JCT US 12 · Structure no. 000000016732234
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected July 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 204 ft
- 3 main spans
- Daily traffic
- 826
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR SD1806 over Burlington Northern RR is a steel continuous stringer/multi-beam or girder carrying IRR SD1806 over Burlington Northern RR in Corson County, South Dakota. It was built in 1973, so it is 52 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 826 vehicles a day, roughly 5% of them trucks, projected to reach 1,079 by 2044. The structure is 204 ft (62.1 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR SD1806 over Burlington Northern RR built?
It was built in 1973, making it 52 years old in 2025.
What condition is IRR SD1806 over Burlington Northern RR 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 IRR SD1806 over Burlington Northern RR carry?
About 826 vehicles per day (2024 count), of which roughly 5% are trucks.
How long is IRR SD1806 over Burlington Northern RR?
The structure is 204 ft (62.1 m) long with a longest span of 78 ft (23.8 m) and a deck 31 ft wide.
Who owns IRR SD1806 over Burlington Northern RR?
It is owned by the State Highway Agency.