X 99 over Iowa River
FairLouisa County, Iowa · 073022602 · Structure no. 000000000034171
- Built
- 2014
- 11 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 1,159 ft
- 8 main spans
- Daily traffic
- 570
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
X 99 over Iowa River is a prestressed concrete stringer/multi-beam or girder carrying X 99 over Iowa River in Louisa County, Iowa. It was built in 2014, so it is 11 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 570 vehicles a day, roughly 27% of them trucks, projected to reach 570 by 2044. The structure is 1,159 ft (353.3 m) long and 52 ft wide. If it were closed, the detour would be 19.9 mi (32 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 | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 X 99 over Iowa River built?
It was built in 2014, making it 11 years old in 2025.
What condition is X 99 over Iowa River 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 May 2024.
How much traffic does X 99 over Iowa River carry?
About 570 vehicles per day (2022 count), of which roughly 27% are trucks.
How long is X 99 over Iowa River?
The structure is 1,159 ft (353.3 m) long with a longest span of 150 ft (45.7 m) and a deck 52 ft wide.
Who owns X 99 over Iowa River?
It is owned by the County Highway Agency.