Ia 37 over Mill Creek
FairShelby County, Iowa · 3.7 E of Jct. US 30 · Structure no. 000000000047851
- Built
- 1992
- 33 years old
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 200 ft
- 3 main spans
- Daily traffic
- 630
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Ia 37 over Mill Creek is a prestressed concrete stringer/multi-beam or girder carrying Ia 37 over Mill Creek in Shelby County, Iowa. It was built in 1992, so it is 33 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 5 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 630 vehicles a day, roughly 19% of them trucks, projected to reach 630 by 2044. The structure is 200 ft (61 m) long and 39 ft wide. If it were closed, the detour would be 24.9 mi (40 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 37 over Mill Creek built?
It was built in 1992, making it 33 years old in 2025.
What condition is Ia 37 over Mill 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 May 2024.
How much traffic does Ia 37 over Mill Creek carry?
About 630 vehicles per day (2022 count), of which roughly 19% are trucks.
How long is Ia 37 over Mill Creek?
The structure is 200 ft (61 m) long with a longest span of 77 ft (23.5 m) and a deck 39 ft wide.
Who owns Ia 37 over Mill Creek?
It is owned by the State Highway Agency.