US 18 WB over Ia Northern RR & Stream
GoodFloyd County, Iowa · 1.1 Mi. E of JCT SR S70 · Structure no. 000000000606620
- Built
- 1998
- 27 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 604 ft
- 6 main spans
- Daily traffic
- 5,350
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US 18 WB over Ia Northern RR & Stream is a prestressed concrete stringer/multi-beam or girder carrying US 18 WB over Ia Northern RR & Stream in Floyd County, Iowa. It was built in 1998, so it is 27 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 5,350 vehicles a day, roughly 25% of them trucks, projected to reach 5,350 by 2044. The structure is 604 ft (184.1 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 | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US 18 WB over Ia Northern RR & Stream built?
It was built in 1998, making it 27 years old in 2025.
What condition is US 18 WB over Ia Northern RR & Stream 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 July 2024.
How much traffic does US 18 WB over Ia Northern RR & Stream carry?
About 5,350 vehicles per day (2022 count), of which roughly 25% are trucks.
How long is US 18 WB over Ia Northern RR & Stream?
The structure is 604 ft (184.1 m) long with a longest span of 121 ft (36.9 m) and a deck 43 ft wide.
Who owns US 18 WB over Ia Northern RR & Stream?
It is owned by the State Highway Agency.