NFSR 50311 over Anderson Ck
FairAdams County, Idaho · No Data Entered · Structure no. 041201000001193
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 32 ft
- 1 main span
- Daily traffic
- 50
- Owner
- Federal
- U.S. Forest Service
About this bridge
NFSR 50311 over Anderson Ck is a wood or timber stringer/multi-beam or girder carrying NFSR 50311 over Anderson Ck in Adams 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 32 ft (9.8 m) long and 15 ft wide. If it were closed, the detour would be 620.7 mi (999 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NFSR 50311 over Anderson Ck built?
It was built in 1974, making it 51 years old in 2025.
What condition is NFSR 50311 over Anderson Ck 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 October 2023.
How much traffic does NFSR 50311 over Anderson Ck carry?
About 50 vehicles per day (latest count).
How long is NFSR 50311 over Anderson Ck?
The structure is 32 ft (9.8 m) long with a longest span of 31 ft (9.4 m) and a deck 15 ft wide.
Who owns NFSR 50311 over Anderson Ck?
It is owned by the U.S. Forest Service.