El Nido Ranch RD over Lafayette Aqueduct
GoodContra Costa County, California · 0.1 MI N Mt Diablo · Structure no. 28C0178
- Built
- 1969
- 56 years old
- Condition
- Good
- inspected December 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 171 ft
- 2 main spans
- Daily traffic
- 2,843
- 2021 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
El Nido Ranch RD over Lafayette Aqueduct is a prestressed concrete stringer/multi-beam or girder carrying El Nido Ranch RD over Lafayette Aqueduct in Contra Costa County, California. It was built in 1969, so it is 56 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 2,843 vehicles a day, roughly 1% of them trucks, projected to reach 2,754 by 2042. The structure is 171 ft (52.1 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was El Nido Ranch RD over Lafayette Aqueduct built?
It was built in 1969, making it 56 years old in 2025.
What condition is El Nido Ranch RD over Lafayette Aqueduct 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 December 2023.
How much traffic does El Nido Ranch RD over Lafayette Aqueduct carry?
About 2,843 vehicles per day (2021 count), of which roughly 1% are trucks.
How long is El Nido Ranch RD over Lafayette Aqueduct?
The structure is 171 ft (52.1 m) long with a longest span of 84 ft (25.6 m) and a deck 47 ft wide.
Who owns El Nido Ranch RD over Lafayette Aqueduct?
It is owned by the City or Municipal Highway Agency.