LA Sierra Avenue over Lake Mathews Overflow
GoodRiverside County, California · 1.0 Mi. N/O Cajalco Road · Structure no. 56C0171
- Built
- 1961
- 64 years old
- Condition
- Good
- inspected March 2022
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 71 ft
- 2 main spans
- Daily traffic
- 5,291
- 2014 count
- Owner
- County
- County Highway Agency
About this bridge
LA Sierra Avenue over Lake Mathews Overflow is a prestressed concrete box beam or girders - multiple carrying LA Sierra Avenue over Lake Mathews Overflow in Riverside County, California. It was built in 1961, so it is 64 years old, older than the California average of 54.8 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 5,291 vehicles a day, roughly 1% of them trucks, projected to reach 4,149 by 2042. The structure is 71 ft (21.6 m) long and 61 ft wide. If it were closed, the detour would be 9.9 mi (16 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. |
| Channel and channel protection | 9 Excellent | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was LA Sierra Avenue over Lake Mathews Overflow built?
It was built in 1961, making it 64 years old in 2025.
What condition is LA Sierra Avenue over Lake Mathews Overflow 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 March 2022.
How much traffic does LA Sierra Avenue over Lake Mathews Overflow carry?
About 5,291 vehicles per day (2014 count), of which roughly 1% are trucks.
How long is LA Sierra Avenue over Lake Mathews Overflow?
The structure is 71 ft (21.6 m) long with a longest span of 49 ft (14.9 m) and a deck 61 ft wide.
Who owns LA Sierra Avenue over Lake Mathews Overflow?
It is owned by the County Highway Agency.