Manthey Road over San Joaquin River
San Joaquin County, California · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Manthey Road over San Joaquin River in San Joaquin County, California, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 1926, making it 99 years old at the 2025 inventory.
- It carries about 750 vehicles a day (traffic count year 1987).
- 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 → (37.78532, -121.30764)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 4 | Poor condition |
| Superstructure | 5 | Fair condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Steel through truss |
| Length | about 536 ft |
| Location | 0.2 Mi NE of Stewart Rd |
| NBI structure number | 29C0127 |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
All bridges nearby: San Joaquin County, CA bridge conditions · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.