IRR Ar SD063 over Simms Ck
FairMellette County, South Dakota · 10 N JCT Sd 44 · Structure no. 000000048021125
- Built
- 1959
- 66 years old
- Condition
- Fair
- inspected January 2025
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 134 ft
- 3 main spans
- Daily traffic
- 177
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
IRR Ar SD063 over Simms Ck is a steel stringer/multi-beam or girder carrying IRR Ar SD063 over Simms Ck in Mellette County, South Dakota. It was built in 1959, so it is 66 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 177 vehicles a day, roughly 16% of them trucks, projected to reach 222 by 2044. The structure is 134 ft (40.7 m) long and 32 ft wide. If it were closed, the detour would be 39.1 mi (63 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 | 8 Very Good | No problems noted. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR Ar SD063 over Simms Ck built?
It was built in 1959, making it 66 years old in 2025.
What condition is IRR Ar SD063 over Simms Ck 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 January 2025.
How much traffic does IRR Ar SD063 over Simms Ck carry?
About 177 vehicles per day (2024 count), of which roughly 16% are trucks.
How long is IRR Ar SD063 over Simms Ck?
The structure is 134 ft (40.7 m) long with a longest span of 43 ft (13 m) and a deck 32 ft wide.
Who owns IRR Ar SD063 over Simms Ck?
It is owned by the State Highway Agency.