EB US 20 over Blackhawk Creek
FairBlack Hawk County, Iowa · 0.7 Mi. W of Jct. US 63 · Structure no. 000000000605650
- Built
- 1983
- 42 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 421 ft
- 5 main spans
- Daily traffic
- 12,400
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
EB US 20 over Blackhawk Creek is a prestressed concrete stringer/multi-beam or girder carrying EB US 20 over Blackhawk Creek in Black Hawk County, Iowa. It was built in 1983, so it is 42 years old, younger 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 12,400 vehicles a day, roughly 14% of them trucks, projected to reach 12,400 by 2044. The structure is 421 ft (128.3 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
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 | 8 Very Good | No problems noted. |
| 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 EB US 20 over Blackhawk Creek built?
It was built in 1983, making it 42 years old in 2025.
What condition is EB US 20 over Blackhawk Creek 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 November 2024.
How much traffic does EB US 20 over Blackhawk Creek carry?
About 12,400 vehicles per day (2022 count), of which roughly 14% are trucks.
How long is EB US 20 over Blackhawk Creek?
The structure is 421 ft (128.3 m) long with a longest span of 96 ft (29.3 m) and a deck 43 ft wide.
Who owns EB US 20 over Blackhawk Creek?
It is owned by the State Highway Agency.