ST RTE 84 (isabel) over Arroyo Mocho
GoodAlameda County, California · 04-ALA-084-R27.10-LVMR · Structure no. 33 0713
- Built
- 2003
- 22 years old, rebuilt 2014
- Condition
- Good
- inspected August 2023
- Type
- Slab
- Concrete Continuous
- Length
- 124 ft
- 3 main spans
- Daily traffic
- 22,800
- 2010 count
- Owner
- State
- State Highway Agency
About this bridge
ST RTE 84 (isabel) over Arroyo Mocho is a concrete continuous slab carrying ST RTE 84 (isabel) over Arroyo Mocho in Alameda County, California. It was built in 2003 and reconstructed in 2014, so it is 22 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 22,800 vehicles a day, roughly 3% of them trucks, projected to reach 32,820 by 2045. The structure is 124 ft (37.8 m) long and 132 ft wide. If it were closed, the detour would be 6.2 mi (10 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 ST RTE 84 (isabel) over Arroyo Mocho built?
It was built in 2003, making it 22 years old in 2025. It was reconstructed in 2014.
What condition is ST RTE 84 (isabel) over Arroyo Mocho 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 August 2023.
How much traffic does ST RTE 84 (isabel) over Arroyo Mocho carry?
About 22,800 vehicles per day (2010 count), of which roughly 3% are trucks.
How long is ST RTE 84 (isabel) over Arroyo Mocho?
The structure is 124 ft (37.8 m) long with a longest span of 47 ft (14.3 m) and a deck 132 ft wide.
Who owns ST RTE 84 (isabel) over Arroyo Mocho?
It is owned by the State Highway Agency.