South Kolb Road over UP Railroad
FairPima County, Arizona · Kolb Road and UPRR · Structure no. 08747
- Built
- 1984
- 41 years old, rebuilt 1992
- Condition
- Fair
- inspected February 2025
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 217 ft
- 3 main spans
- Daily traffic
- 15,341
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
South Kolb Road over UP Railroad is a prestressed concrete continuous box beam or girders - multiple carrying South Kolb Road over UP Railroad in Pima County, Arizona. It was built in 1984 and reconstructed in 1992, so it is 41 years old, younger than the Arizona average of 47.8 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 15,341 vehicles a day, roughly 10% of them trucks, projected to reach 15,351 by 2042. The structure is 217 ft (66.1 m) long and 79 ft wide. If it were closed, the detour would be 14.9 mi (24 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was South Kolb Road over UP Railroad built?
It was built in 1984, making it 41 years old in 2025. It was reconstructed in 1992.
What condition is South Kolb Road over UP Railroad 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 February 2025.
How much traffic does South Kolb Road over UP Railroad carry?
About 15,341 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is South Kolb Road over UP Railroad?
The structure is 217 ft (66.1 m) long with a longest span of 112 ft (34.1 m) and a deck 79 ft wide.
Who owns South Kolb Road over UP Railroad?
It is owned by the County Highway Agency.