Ia 48 over Overflow Nishnabotna
FairMontgomery County, Iowa · 2.0 Mi. S of Jct. SR H14 · Structure no. 000000000037771
- Built
- 1973
- 52 years old
- Condition
- Fair
- inspected March 2023
- Type
- Slab
- Concrete Continuous
- Length
- 142 ft
- 4 main spans
- Daily traffic
- 1,210
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 48 over Overflow Nishnabotna is a concrete continuous slab carrying Ia 48 over Overflow Nishnabotna in Montgomery County, Iowa. It was built in 1973, so it is 52 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 1,210 vehicles a day, roughly 17% of them trucks, projected to reach 1,210 by 2042. The structure is 142 ft (43.3 m) long and 47 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Ia 48 over Overflow Nishnabotna built?
It was built in 1973, making it 52 years old in 2025.
What condition is Ia 48 over Overflow Nishnabotna 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 March 2023.
How much traffic does Ia 48 over Overflow Nishnabotna carry?
About 1,210 vehicles per day (2022 count), of which roughly 17% are trucks.
How long is Ia 48 over Overflow Nishnabotna?
The structure is 142 ft (43.3 m) long with a longest span of 39 ft (11.9 m) and a deck 47 ft wide.
Who owns Ia 48 over Overflow Nishnabotna?
It is owned by the State Highway Agency.