S 18th Ave over US 30
GoodMarshall County, Iowa · 1.5 Miles E of JCT Ia 14 · Structure no. 000000000601910
- Built
- 1995
- 30 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 282 ft
- 4 main spans
- Daily traffic
- 2,847
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
S 18th Ave over US 30 is a prestressed concrete stringer/multi-beam or girder carrying S 18th Ave over US 30 in Marshall County, Iowa. It was built in 1995, so it is 30 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 2,847 vehicles a day, roughly 12% of them trucks, projected to reach 2,847 by 2042. The structure is 282 ft (86 m) long and 87 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 | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 18th Ave over US 30 built?
It was built in 1995, making it 30 years old in 2025.
What condition is S 18th Ave over US 30 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 September 2023.
How much traffic does S 18th Ave over US 30 carry?
About 2,847 vehicles per day (2022 count), of which roughly 12% are trucks.
How long is S 18th Ave over US 30?
The structure is 282 ft (86 m) long with a longest span of 97 ft (29.6 m) and a deck 87 ft wide.
Who owns S 18th Ave over US 30?
It is owned by the State Highway Agency.