170th Street over Timber Creek
FairSpink County, South Dakota · 5.4 W 7 2 N of Doland · Structure no. 000000058246220
- Built
- 1997
- 28 years old
- Condition
- Fair
- inspected July 2023
- Type
- Channel Beam
- Prestressed Concrete Continuous
- Length
- 50 ft
- 1 main span
- Daily traffic
- 50
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
170th Street over Timber Creek is a prestressed concrete continuous channel beam carrying 170th Street over Timber Creek in Spink County, South Dakota. It was built in 1997, so it is 28 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 50 vehicles a day, roughly 1% of them trucks, projected to reach 75 by 2032. The structure is 50 ft (15.2 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 170th Street over Timber Creek built?
It was built in 1997, making it 28 years old in 2025.
What condition is 170th Street over Timber Creek 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 170th Street over Timber Creek carry?
About 50 vehicles per day (2022 count), of which roughly 1% are trucks.
How long is 170th Street over Timber Creek?
The structure is 50 ft (15.2 m) long with a longest span of 49 ft (14.9 m) and a deck 27 ft wide.
Who owns 170th Street over Timber Creek?
It is owned by the County Highway Agency.