WB US 20 over Ia 58
FairBlack Hawk County, Iowa · At the Jct. Iowa #27 & 58 · Structure no. 000000000605645
- Built
- 1984
- 41 years old
- Condition
- Fair
- inspected February 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 186 ft
- 3 main spans
- Daily traffic
- 7,050
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
WB US 20 over Ia 58 is a prestressed concrete stringer/multi-beam or girder carrying WB US 20 over Ia 58 in Black Hawk County, Iowa. It was built in 1984, so it is 41 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 5 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 7,050 vehicles a day, roughly 20% of them trucks, projected to reach 7,050 by 2042. The structure is 186 ft (56.7 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was WB US 20 over Ia 58 built?
It was built in 1984, making it 41 years old in 2025.
What condition is WB US 20 over Ia 58 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 February 2023.
How much traffic does WB US 20 over Ia 58 carry?
About 7,050 vehicles per day (2022 count), of which roughly 20% are trucks.
How long is WB US 20 over Ia 58?
The structure is 186 ft (56.7 m) long with a longest span of 92 ft (28 m) and a deck 43 ft wide.
Who owns WB US 20 over Ia 58?
It is owned by the State Highway Agency.