US 61 SB over N Fork Maquoketa River
GoodJackson County, Iowa · 5.4 Mi. N of Jct. Ia 64 · Structure no. 000000000606485
- Built
- 1996
- 29 years old
- Condition
- Good
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 368 ft
- 4 main spans
- Daily traffic
- 4,050
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
US 61 SB over N Fork Maquoketa River is a prestressed concrete stringer/multi-beam or girder carrying US 61 SB over N Fork Maquoketa River in Jackson County, Iowa. It was built in 1996, so it is 29 years old, younger than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 4,050 vehicles a day, roughly 22% of them trucks, projected to reach 4,050 by 2043. The structure is 368 ft (112.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 61 SB over N Fork Maquoketa River built?
It was built in 1996, making it 29 years old in 2025.
What condition is US 61 SB over N Fork Maquoketa River in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.
How much traffic does US 61 SB over N Fork Maquoketa River carry?
About 4,050 vehicles per day (2021 count), of which roughly 22% are trucks.
How long is US 61 SB over N Fork Maquoketa River?
The structure is 368 ft (112.2 m) long with a longest span of 102 ft (31.1 m) and a deck 43 ft wide.
Who owns US 61 SB over N Fork Maquoketa River?
It is owned by the State Highway Agency.