Route 105 & Lrt over UP RR Alameda Mona
FairLos Angeles County, California · 07-LA-105-R10.25-LYN · Structure no. 53 2490
- Built
- 1993
- 32 years old
- Condition
- Fair
- inspected June 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete Continuous
- Length
- 3,565 ft
- 22 main spans
- Daily traffic
- 236,000
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
Route 105 & Lrt over UP RR Alameda Mona is a prestressed concrete continuous box beam or girders - multiple carrying Route 105 & Lrt over UP RR Alameda Mona in Los Angeles County, California. It was built in 1993, so it is 32 years old, younger 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 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 236,000 vehicles a day, roughly 6% of them trucks, projected to reach 300,000 by 2042. The structure is 3,565 ft (1,086.6 m) long and 176 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Route 105 & Lrt over UP RR Alameda Mona built?
It was built in 1993, making it 32 years old in 2025.
What condition is Route 105 & Lrt over UP RR Alameda Mona 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 June 2024.
How much traffic does Route 105 & Lrt over UP RR Alameda Mona carry?
About 236,000 vehicles per day (2022 count), of which roughly 6% are trucks.
How long is Route 105 & Lrt over UP RR Alameda Mona?
The structure is 3,565 ft (1,086.6 m) long with a longest span of 201 ft (61.3 m) and a deck 176 ft wide.
Who owns Route 105 & Lrt over UP RR Alameda Mona?
It is owned by the State Highway Agency.