SD109 over Burlington Northern RR
FairGrant County, South Dakota · 0.1 N JCT US 12 · Structure no. 000000026373023
- Built
- 1983
- 42 years old
- Condition
- Fair
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 204 ft
- 3 main spans
- Daily traffic
- 1,166
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
SD109 over Burlington Northern RR is a prestressed concrete continuous stringer/multi-beam or girder carrying SD109 over Burlington Northern RR in Grant County, South Dakota. It was built in 1983, so it is 42 years old, younger 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 1,166 vehicles a day, roughly 24% of them trucks, projected to reach 1,593 by 2044. The structure is 204 ft (62.3 m) long and 43 ft wide. If it were closed, the detour would be 11.8 mi (19 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SD109 over Burlington Northern RR built?
It was built in 1983, making it 42 years old in 2025.
What condition is SD109 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 March 2023.
How much traffic does SD109 over Burlington Northern RR carry?
About 1,166 vehicles per day (2024 count), of which roughly 24% are trucks.
How long is SD109 over Burlington Northern RR?
The structure is 204 ft (62.3 m) long with a longest span of 73 ft (22.4 m) and a deck 43 ft wide.
Who owns SD109 over Burlington Northern RR?
It is owned by the State Highway Agency.