W 4000 N over Warm Slough
FairMadison County, Idaho · 3.8 N. 4.2 W. Rexburg · Structure no. 000000000032850
- Built
- 1968
- 57 years old
- Condition
- Fair
- inspected April 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 72 ft
- 1 main span
- Daily traffic
- 50
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
W 4000 N over Warm Slough is a prestressed concrete tee beam carrying W 4000 N over Warm Slough in Madison County, Idaho. It was built in 1968, so it is 57 years old, older than the Idaho average of 45.3 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 10% of them trucks, projected to reach 75 by 2039. The structure is 72 ft (21.9 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
| 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 W 4000 N over Warm Slough built?
It was built in 1968, making it 57 years old in 2025.
What condition is W 4000 N over Warm Slough 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 April 2024.
How much traffic does W 4000 N over Warm Slough carry?
About 50 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is W 4000 N over Warm Slough?
The structure is 72 ft (21.9 m) long with a longest span of 70 ft (21.3 m) and a deck 30 ft wide.
Who owns W 4000 N over Warm Slough?
It is owned by the County Highway Agency.