66th AV-S880 Onrmp over Damon Slough
FairAlameda County, California · 04-ALA-880-26.53-OAK · Structure no. 33 0142K
- Built
- 1948
- 77 years old
- Condition
- Fair
- inspected January 2025
- Type
- Slab
- Concrete Continuous
- Length
- 170 ft
- 7 main spans
- Daily traffic
- 3,300
- 1998 count
- Owner
- State
- State Highway Agency
About this bridge
66th AV-S880 Onrmp over Damon Slough is a concrete continuous slab carrying 66th AV-S880 Onrmp over Damon Slough in Alameda County, California. It was built in 1948, so it is 77 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 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 3,300 vehicles a day, roughly 10% of them trucks, projected to reach 7,358 by 2043. The structure is 170 ft (51.8 m) long and 34 ft wide.
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 | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 66th AV-S880 Onrmp over Damon Slough built?
It was built in 1948, making it 77 years old in 2025.
What condition is 66th AV-S880 Onrmp over Damon Slough 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 January 2025.
How much traffic does 66th AV-S880 Onrmp over Damon Slough carry?
About 3,300 vehicles per day (1998 count), of which roughly 10% are trucks.
How long is 66th AV-S880 Onrmp over Damon Slough?
The structure is 170 ft (51.8 m) long with a longest span of 26 ft (7.9 m) and a deck 34 ft wide.
Who owns 66th AV-S880 Onrmp over Damon Slough?
It is owned by the State Highway Agency.