US183 over Mill Iron Ck
GoodLyman County, South Dakota · 1.0 E & 6.5 S Presho · Structure no. 000000043160265
- Built
- 2005
- 20 years old
- Condition
- Good
- inspected December 2021
- Type
- Culvert
- Concrete Continuous
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 689
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
US183 over Mill Iron Ck is a concrete continuous culvert carrying US183 over Mill Iron Ck in Lyman County, South Dakota. It was built in 2005, so it is 20 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 689 vehicles a day, roughly 31% of them trucks, projected to reach 935 by 2044. The structure is 21 ft (6.3 m) long. If it were closed, the detour would be 29.8 mi (48 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 US183 over Mill Iron Ck built?
It was built in 2005, making it 20 years old in 2025.
What condition is US183 over Mill Iron 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 December 2021.
How much traffic does US183 over Mill Iron Ck carry?
About 689 vehicles per day (2024 count), of which roughly 31% are trucks.
How long is US183 over Mill Iron Ck?
The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m).
Who owns US183 over Mill Iron Ck?
It is owned by the State Highway Agency.