X20 over Small
FairAllamakee County, Iowa · 099050209 · Structure no. 000000000364770
- Built
- 2004
- 21 years old
- Condition
- Fair
- inspected December 2022
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 41 ft
- 1 main span
- Daily traffic
- 690
- 2021 count
- Owner
- County
- County Highway Agency
About this bridge
X20 over Small is a prestressed concrete tee beam carrying X20 over Small in Allamakee County, Iowa. It was built in 2004, so it is 21 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 690 vehicles a day, roughly 12% of them trucks, projected to reach 690 by 2043. The structure is 41 ft (12.5 m) long and 33 ft wide.
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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was X20 over Small built?
It was built in 2004, making it 21 years old in 2025.
What condition is X20 over Small 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 December 2022.
How much traffic does X20 over Small carry?
About 690 vehicles per day (2021 count), of which roughly 12% are trucks.
How long is X20 over Small?
The structure is 41 ft (12.5 m) long with a longest span of 40 ft (12.2 m) and a deck 33 ft wide.
Who owns X20 over Small?
It is owned by the County Highway Agency.