Ia 51 over N Fork Yellow River
FairAllamakee County, Iowa · 3.5 Mi. S of Jct. Ia 9 · Structure no. 000000000013600
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected July 2023
- Type
- Girder and Floorbeam System
- Steel Continuous
- Length
- 284 ft
- 3 main spans
- Daily traffic
- 1,440
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 51 over N Fork Yellow River is a steel continuous girder and floorbeam system carrying Ia 51 over N Fork Yellow River in Allamakee County, Iowa. It was built in 1967, so it is 58 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 1,440 vehicles a day, roughly 30% of them trucks, projected to reach 1,440 by 2043. The structure is 284 ft (86.6 m) long and 35 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Ia 51 over N Fork Yellow River built?
It was built in 1967, making it 58 years old in 2025.
What condition is Ia 51 over N Fork Yellow River 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 2023.
How much traffic does Ia 51 over N Fork Yellow River carry?
About 1,440 vehicles per day (2022 count), of which roughly 30% are trucks.
How long is Ia 51 over N Fork Yellow River?
The structure is 284 ft (86.6 m) long with a longest span of 109 ft (33.2 m) and a deck 35 ft wide.
Who owns Ia 51 over N Fork Yellow River?
It is owned by the State Highway Agency.