IRR US018 over Saint Francis Bay
GoodCharles Mix County, South Dakota · 0.8 N of Pickstown · Structure no. 000000012387289
- Built
- 2023
- 2 years old
- Condition
- Good
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 225 ft
- 2 main spans
- Daily traffic
- 1,494
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR US018 over Saint Francis Bay is a prestressed concrete stringer/multi-beam or girder carrying IRR US018 over Saint Francis Bay in Charles Mix County, South Dakota. It was built in 2023, so it is 2 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 1,494 vehicles a day, roughly 16% of them trucks, projected to reach 2,156 by 2044. The structure is 225 ft (68.6 m) long and 52 ft wide. If it were closed, the detour would be 21.7 mi (35 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR US018 over Saint Francis Bay built?
It was built in 2023, making it 2 years old in 2025.
What condition is IRR US018 over Saint Francis Bay in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.
How much traffic does IRR US018 over Saint Francis Bay carry?
About 1,494 vehicles per day (2024 count), of which roughly 16% are trucks.
How long is IRR US018 over Saint Francis Bay?
The structure is 225 ft (68.6 m) long with a longest span of 111 ft (33.9 m) and a deck 52 ft wide.
Who owns IRR US018 over Saint Francis Bay?
It is owned by the State Highway Agency.