S 21 over Spring Creek Coulee 124
FairLewis and Clark County, Montana · 5M E Augusta · Structure no. L25400004+04001
- Built
- 1982
- 43 years old
- Condition
- Fair
- inspected March 2024
- Type
- Culvert
- Steel
- Length
- 20 ft
- 2 main spans
- Daily traffic
- 260
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 21 over Spring Creek Coulee 124 is a steel culvert carrying S 21 over Spring Creek Coulee 124 in Lewis and Clark County, Montana. It was built in 1982, so it is 43 years old, younger than the Montana average of 47 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 260 vehicles a day, roughly 5% of them trucks, projected to reach 273 by 2043. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 11.2 mi (18 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 |
|---|---|---|
| Channel and channel protection | 7 Good | Some minor problems. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 21 over Spring Creek Coulee 124 built?
It was built in 1982, making it 43 years old in 2025.
What condition is S 21 over Spring Creek Coulee 124 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 March 2024.
How much traffic does S 21 over Spring Creek Coulee 124 carry?
About 260 vehicles per day (2023 count), of which roughly 5% are trucks.
How long is S 21 over Spring Creek Coulee 124?
The structure is 20 ft (6.1 m) long with a longest span of 8 ft (2.4 m).
Who owns S 21 over Spring Creek Coulee 124?
It is owned by the State Highway Agency.