SH 75 over Fourth of July Creek
FairCuster County, Idaho · 3.8 S. Obsidian · Structure no. 000000000017740
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected July 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 26 ft
- 1 main span
- Daily traffic
- 800
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
SH 75 over Fourth of July Creek is a prestressed concrete tee beam carrying SH 75 over Fourth of July Creek in Custer County, Idaho. It was built in 1974, so it is 51 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 800 vehicles a day, roughly 16% of them trucks, projected to reach 1,200 by 2042. The structure is 26 ft (7.9 m) long and 41 ft wide. If it were closed, the detour would be 98.8 mi (159 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SH 75 over Fourth of July Creek built?
It was built in 1974, making it 51 years old in 2025.
What condition is SH 75 over Fourth of July Creek 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 July 2024.
How much traffic does SH 75 over Fourth of July Creek carry?
About 800 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is SH 75 over Fourth of July Creek?
The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 41 ft wide.
Who owns SH 75 over Fourth of July Creek?
It is owned by the State Highway Agency.