Brea Cyn RD over Diamond Bar Crk
GoodLos Angeles County, California · 0.2MI N/O Lycoming ST · Structure no. 53C0579
- Built
- 1980
- 45 years old, rebuilt 1983
- Condition
- Good
- inspected September 2021
- Type
- Culvert
- Concrete
- Length
- 21 ft
- 1 main span
- Daily traffic
- 16,135
- 2012 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Brea Cyn RD over Diamond Bar Crk is a concrete culvert carrying Brea Cyn RD over Diamond Bar Crk in Los Angeles County, California. It was built in 1980 and reconstructed in 1983, so it is 45 years old, younger 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 16,135 vehicles a day, roughly 2% of them trucks, projected to reach 19,362 by 2041. The structure is 21 ft (6.4 m) long and 101 ft wide. If it were closed, the detour would be 5 mi (8 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Brea Cyn RD over Diamond Bar Crk built?
It was built in 1980, making it 45 years old in 2025. It was reconstructed in 1983.
What condition is Brea Cyn RD over Diamond Bar Crk 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 September 2021.
How much traffic does Brea Cyn RD over Diamond Bar Crk carry?
About 16,135 vehicles per day (2012 count), of which roughly 2% are trucks.
How long is Brea Cyn RD over Diamond Bar Crk?
The structure is 21 ft (6.4 m) long with a longest span of 15 ft (4.6 m) and a deck 101 ft wide.
Who owns Brea Cyn RD over Diamond Bar Crk?
It is owned by the City or Municipal Highway Agency.