ST Onge Road over Miller Ck
PoorLawrence County, South Dakota · .3W4.5S ST Onge-Spearfish · Structure no. 000000041160085
- Built
- 1950
- 75 years old
- Condition
- Poor
- inspected October 2023
- Type
- Culvert
- Concrete
- Length
- 29 ft
- 2 main spans
- Daily traffic
- 50
- 2022 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
ST Onge Road over Miller Ck is a concrete culvert carrying ST Onge Road over Miller Ck in Lawrence County, South Dakota. It was built in 1950, so it is 75 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 50 vehicles a day, roughly 3% of them trucks, projected to reach 50 by 2035. The structure is 29 ft (8.7 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
| Culvert | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was ST Onge Road over Miller Ck built?
It was built in 1950, making it 75 years old in 2025.
What condition is ST Onge Road over Miller Ck in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2023.
How much traffic does ST Onge Road over Miller Ck carry?
About 50 vehicles per day (2022 count), of which roughly 3% are trucks.
How long is ST Onge Road over Miller Ck?
The structure is 29 ft (8.7 m) long with a longest span of 12 ft (3.7 m) and a deck 30 ft wide.
Who owns ST Onge Road over Miller Ck?
It is owned by the City or Municipal Highway Agency.