NB Ia 27 over 18th ST
GoodBlack Hawk County, Iowa · 1.6 Mi. S of US 218 · Structure no. 000000000601490
- Built
- 1994
- 31 years old
- Condition
- Good
- inspected May 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 215 ft
- 3 main spans
- Daily traffic
- 7,550
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
NB Ia 27 over 18th ST is a prestressed concrete stringer/multi-beam or girder carrying NB Ia 27 over 18th ST in Black Hawk County, Iowa. It was built in 1994, so it is 31 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 7,550 vehicles a day, roughly 7% of them trucks, projected to reach 7,550 by 2042. The structure is 215 ft (65.5 m) long and 44 ft wide.
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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NB Ia 27 over 18th ST built?
It was built in 1994, making it 31 years old in 2025.
What condition is NB Ia 27 over 18th ST 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 May 2023.
How much traffic does NB Ia 27 over 18th ST carry?
About 7,550 vehicles per day (2022 count), of which roughly 7% are trucks.
How long is NB Ia 27 over 18th ST?
The structure is 215 ft (65.5 m) long with a longest span of 106 ft (32.3 m) and a deck 44 ft wide.
Who owns NB Ia 27 over 18th ST?
It is owned by the State Highway Agency.