I 80 WB over Iowa 21
PoorPoweshiek County, Iowa · At Jct. Iowa 21 · Structure no. 000000000046220
- Built
- 1963
- 62 years old
- Condition
- Poor
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 137 ft
- 3 main spans
- Daily traffic
- 13,300
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
I 80 WB over Iowa 21 is a prestressed concrete stringer/multi-beam or girder carrying I 80 WB over Iowa 21 in Poweshiek County, Iowa. It was built in 1963, so it is 62 years old, older than the Iowa average of 45.5 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 13,300 vehicles a day, roughly 37% of them trucks, projected to reach 13,300 by 2042. The structure is 137 ft (41.8 m) long and 51 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 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was I 80 WB over Iowa 21 built?
It was built in 1963, making it 62 years old in 2025.
What condition is I 80 WB over Iowa 21 in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.
How much traffic does I 80 WB over Iowa 21 carry?
About 13,300 vehicles per day (2022 count), of which roughly 37% are trucks.
How long is I 80 WB over Iowa 21?
The structure is 137 ft (41.8 m) long with a longest span of 56 ft (17.1 m) and a deck 51 ft wide.
Who owns I 80 WB over Iowa 21?
It is owned by the State Highway Agency.