Alcorn Ridge Road over Polo Ck
GoodLawrence County, South Dakota · 0.9E JCT US85S -Spearfish · Structure no. 000000041163083
- Built
- 2018
- 7 years old
- Condition
- Good
- inspected October 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 50 ft
- 4 main spans
- Daily traffic
- 1,000
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Alcorn Ridge Road over Polo Ck is a concrete continuous culvert carrying Alcorn Ridge Road over Polo Ck in Lawrence County, South Dakota. It was built in 2018, so it is 7 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 1,000 vehicles a day, roughly 2% of them trucks, projected to reach 1,000 by 2035. The structure is 50 ft (15.3 m) long. If it were closed, the detour would be 9.9 mi (16 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 |
|---|---|---|
| Channel and channel protection | 9 Excellent | No problems noted. |
| Culvert | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Alcorn Ridge Road over Polo Ck built?
It was built in 2018, making it 7 years old in 2025.
What condition is Alcorn Ridge Road over Polo 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 October 2023.
How much traffic does Alcorn Ridge Road over Polo Ck carry?
About 1,000 vehicles per day (2022 count), of which roughly 2% are trucks.
How long is Alcorn Ridge Road over Polo Ck?
The structure is 50 ft (15.3 m) long with a longest span of 12 ft (3.7 m).
Who owns Alcorn Ridge Road over Polo Ck?
It is owned by the City or Municipal Highway Agency.