N3175 over I-35 under
GoodMcClain County, Oklahoma · 3.1 MI N Garvin C/L · Structure no. 173410000000000
- Built
- 1968
- 57 years old
- Condition
- Good
- inspected June 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 249 ft
- 3 main spans
- Daily traffic
- 500
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
N3175 over I-35 under is a steel continuous stringer/multi-beam or girder carrying N3175 over I-35 under in McClain County, Oklahoma. It was built in 1968, so it is 57 years old, older than the Oklahoma average of 47.8 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 500 vehicles a day, roughly 15% of them trucks, projected to reach 800 by 2042. The structure is 249 ft (75.9 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| 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 N3175 over I-35 under built?
It was built in 1968, making it 57 years old in 2025.
What condition is N3175 over I-35 under in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.
How much traffic does N3175 over I-35 under carry?
About 500 vehicles per day (2022 count), of which roughly 15% are trucks.
How long is N3175 over I-35 under?
The structure is 249 ft (75.9 m) long with a longest span of 89 ft (27.1 m) and a deck 29 ft wide.
Who owns N3175 over I-35 under?
It is owned by the State Highway Agency.