US 61 NB over S Fork Maquoketa River
FairJackson County, Iowa · 0.5 Mi. N of Jct. Ia 64 · Structure no. 000000000030150
- Built
- 1967
- 58 years old
- Condition
- Fair
- inspected July 2024
- Type
- Girder and Floorbeam System
- Steel Continuous
- Length
- 374 ft
- 3 main spans
- Daily traffic
- 5,100
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 61 NB over S Fork Maquoketa River is a steel continuous girder and floorbeam system carrying US 61 NB over S Fork Maquoketa River in Jackson 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 5,100 vehicles a day, roughly 18% of them trucks, projected to reach 5,100 by 2044. The structure is 374 ft (114 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 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 US 61 NB over S Fork Maquoketa River built?
It was built in 1967, making it 58 years old in 2025.
What condition is US 61 NB over S Fork Maquoketa 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 2024.
How much traffic does US 61 NB over S Fork Maquoketa River carry?
About 5,100 vehicles per day (2022 count), of which roughly 18% are trucks.
How long is US 61 NB over S Fork Maquoketa River?
The structure is 374 ft (114 m) long with a longest span of 144 ft (43.9 m) and a deck 35 ft wide.
Who owns US 61 NB over S Fork Maquoketa River?
It is owned by the State Highway Agency.