North Lake Drive over Lake Alhambra
Contra Costa County, California · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- North Lake Drive over Lake Alhambra in Contra Costa County, California, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 1961 and reconstructed in 1987, making it 64 years old at the 2025 inventory.
- It carries about 1,500 vehicles a day (traffic count year 2020).
- Its listed owner is a city or municipal highway agency.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (38.0101, -121.79579)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 4 | Poor condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 33 ft |
| Location | at East 13TH St |
| NBI structure number | 28C0424 |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
All bridges nearby: Contra Costa County, CA bridge conditions · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.