Ia 9 over Mississippi River
PoorPosted for loadAllamakee County, Iowa · In Lansing · Structure no. 000000000013520
- Built
- 1931
- 94 years old, rebuilt 1955
- Condition
- Poor
- inspected August 2023
- Type
- Truss - Thru
- Steel Continuous
- Length
- 1,630 ft
- 3 main spans
- Daily traffic
- 2,200
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 9 over Mississippi River is a steel continuous truss - thru carrying Ia 9 over Mississippi River in Allamakee County, Iowa. It was built in 1931 and reconstructed in 1955, so it is 94 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. Its operating status is: posted for load restriction.
It carries about 2,200 vehicles a day, roughly 12% of them trucks, projected to reach 2,200 by 2043. The structure is 1,630 ft (496.8 m) long and 23 ft wide. If it were closed, the detour would be 55.3 mi (89 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 Ia 9 over Mississippi River built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1955.
What condition is Ia 9 over Mississippi River 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 August 2023.
How much traffic does Ia 9 over Mississippi River carry?
About 2,200 vehicles per day (2022 count), of which roughly 12% are trucks.
How long is Ia 9 over Mississippi River?
The structure is 1,630 ft (496.8 m) long with a longest span of 652 ft (198.7 m) and a deck 23 ft wide.
Who owns Ia 9 over Mississippi River?
It is owned by the State Highway Agency.