Sycamore Valley Rd over Interstate 680
Contra Costa County, California · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Sycamore Valley Rd over Interstate 680 in Contra Costa County, California, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1964 and reconstructed in 1989, making it 61 years old at the 2025 inventory.
- It carries about 3,000 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 260 of the 622 inventoried bridges in Contra Costa County rated good (41.8%); 56 (9.0%) are rated poor.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (37.81124, -121.9933)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous concrete multiple box beam |
| Length | about 282 ft |
| Location | 04-cc-680-r6.76-dnvl |
| NBI structure number | 28 0195 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Contra Costa County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 680 over Canal & Bike Path | 1956 | 257,000 | Fair |
| Interstate 680 over Monument Boulevard | 1998 | 235,000 | Poor |
| Interstate 680 over Parkside Drive | 1960 | 235,000 | Good |
| Interstate 680 over Rudgear Road | 1964 | 197,400 | Good |
| Interstate 680 over Livorna Road | 1964 | 197,400 | Good |
| Interstate 680 over Newell Avenue | 1994 | 195,300 | Fair |
All bridges nearby: Contra Costa County, CA bridge conditions · every bridge in Contra Costa County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.