NB 218 WB 57 over Cedar River Overflow
FairBlack Hawk County, Iowa · 0.2 Mi. E of Ia. 27 · Structure no. 000000000014605
- Built
- 1974
- 51 years old, rebuilt 1992
- Condition
- Fair
- inspected July 2023
- Type
- Slab
- Concrete Continuous
- Length
- 533 ft
- 11 main spans
- Daily traffic
- 9,800
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
NB 218 WB 57 over Cedar River Overflow is a concrete continuous slab carrying NB 218 WB 57 over Cedar River Overflow in Black Hawk County, Iowa. It was built in 1974 and reconstructed in 1992, so it is 51 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 6 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 9,800 vehicles a day, roughly 5% of them trucks, projected to reach 9,800 by 2043. The structure is 533 ft (162.5 m) long and 59 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NB 218 WB 57 over Cedar River Overflow built?
It was built in 1974, making it 51 years old in 2025. It was reconstructed in 1992.
What condition is NB 218 WB 57 over Cedar River Overflow 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 2023.
How much traffic does NB 218 WB 57 over Cedar River Overflow carry?
About 9,800 vehicles per day (2022 count), of which roughly 5% are trucks.
How long is NB 218 WB 57 over Cedar River Overflow?
The structure is 533 ft (162.5 m) long with a longest span of 50 ft (15.2 m) and a deck 59 ft wide.
Who owns NB 218 WB 57 over Cedar River Overflow?
It is owned by the State Highway Agency.