N 1st Avenue over Mojave River Overflow
FairSan Bernardino County, California · 0.1 MI N of Irwin Rd. · Structure no. 54C0090
- Built
- 1939
- 86 years old
- Condition
- Fair
- inspected November 2024
- Type
- Slab
- Concrete Continuous
- Length
- 321 ft
- 12 main spans
- Daily traffic
- 3,400
- 2015 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
N 1st Avenue over Mojave River Overflow is a concrete continuous slab carrying N 1st Avenue over Mojave River Overflow in San Bernardino County, California. It was built in 1939, so it is 86 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 3,400 vehicles a day, roughly 2% of them trucks, projected to reach 5,525 by 2046. The structure is 321 ft (97.8 m) long and 32 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was N 1st Avenue over Mojave River Overflow built?
It was built in 1939, making it 86 years old in 2025.
What condition is N 1st Avenue over Mojave River Overflow 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 November 2024.
How much traffic does N 1st Avenue over Mojave River Overflow carry?
About 3,400 vehicles per day (2015 count), of which roughly 2% are trucks.
How long is N 1st Avenue over Mojave River Overflow?
The structure is 321 ft (97.8 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.
Who owns N 1st Avenue over Mojave River Overflow?
It is owned by the City or Municipal Highway Agency.