Ia 21 over Stein Creek
FairBenton County, Iowa · 200 Ft. N of Jct. SR E36 · Structure no. 000000000014441
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 150 ft
- 3 main spans
- Daily traffic
- 1,470
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 21 over Stein Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 21 over Stein Creek in Benton County, Iowa. It was built in 1979, so it is 46 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 1,470 vehicles a day, roughly 24% of them trucks, projected to reach 1,470 by 2042. The structure is 150 ft (45.7 m) long and 47 ft wide. If it were closed, the detour would be 9.9 mi (16 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ia 21 over Stein Creek built?
It was built in 1979, making it 46 years old in 2025.
What condition is Ia 21 over Stein 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 April 2023.
How much traffic does Ia 21 over Stein Creek carry?
About 1,470 vehicles per day (2022 count), of which roughly 24% are trucks.
How long is Ia 21 over Stein Creek?
The structure is 150 ft (45.7 m) long with a longest span of 52 ft (15.9 m) and a deck 47 ft wide.
Who owns Ia 21 over Stein Creek?
It is owned by the State Highway Agency.