161st Avenue over Trib to Boxelder Ck
GoodPennington County, South Dakota · 0.8 Mi.S. Newunderwd · Structure no. 000000052608298
- Built
- 1973
- 52 years old
- Condition
- Good
- inspected August 2023
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 51 ft
- 1 main span
- Daily traffic
- 372
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
161st Avenue over Trib to Boxelder Ck is a prestressed concrete tee beam carrying 161st Avenue over Trib to Boxelder Ck in Pennington 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 372 vehicles a day, roughly 19% of them trucks, projected to reach 372 by 2032. The structure is 51 ft (15.5 m) long and 30 ft wide. If it were closed, the detour would be 3.7 mi (6 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 161st Avenue over Trib to Boxelder Ck built?
It was built in 1973, making it 52 years old in 2025.
What condition is 161st Avenue over Trib to Boxelder Ck 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 161st Avenue over Trib to Boxelder Ck carry?
About 372 vehicles per day (2022 count), of which roughly 19% are trucks.
How long is 161st Avenue over Trib to Boxelder Ck?
The structure is 51 ft (15.5 m) long with a longest span of 51 ft (15.5 m) and a deck 30 ft wide.
Who owns 161st Avenue over Trib to Boxelder Ck?
It is owned by the County Highway Agency.