Humboldt ST over I 5 & Conn Ramps
FairLos Angeles County, California · 07-LA-005-20.12-LA · Structure no. 53 1374
- Built
- 1962
- 63 years old, rebuilt 1972
- Condition
- Fair
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 201 ft
- 4 main spans
- Daily traffic
- 5,600
- 2021 count
- Owner
- State
- State Highway Agency
About this bridge
Humboldt ST over I 5 & Conn Ramps is a steel stringer/multi-beam or girder carrying Humboldt ST over I 5 & Conn Ramps in Los Angeles County, California. It was built in 1962 and reconstructed in 1972, so it is 63 years old, older than the California average of 54.8 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 5,600 vehicles a day, roughly 10% of them trucks, projected to reach 7,694 by 2042. The structure is 201 ft (61.3 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Humboldt ST over I 5 & Conn Ramps built?
It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1972.
What condition is Humboldt ST over I 5 & Conn Ramps 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 Humboldt ST over I 5 & Conn Ramps carry?
About 5,600 vehicles per day (2021 count), of which roughly 10% are trucks.
How long is Humboldt ST over I 5 & Conn Ramps?
The structure is 201 ft (61.3 m) long with a longest span of 67 ft (20.4 m) and a deck 48 ft wide.
Who owns Humboldt ST over I 5 & Conn Ramps?
It is owned by the State Highway Agency.