US Highway 101 SB over San Antonio River & Dr
Monterey County, California · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US Highway 101 SB over San Antonio River & Dr in Monterey 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 1965, making it 60 years old at the 2025 inventory.
- It carries about 8,100 vehicles a day (traffic count year 2009).
- Its listed owner is the state highway agency.
- It is one of 215 of the 378 inventoried bridges in Monterey County rated good (56.9%); 27 (7.1%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: substructure 7 to 8.
- Its most recent inspection on record is dated October 2023, on a 24-month routine inspection cycle.
- 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 → (35.855, -120.79936)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 8 | Very good condition |
Bridge details
| Structure | Continuous concrete tee beam |
| Length | about 459 ft |
| Location | 05-mon-101-r6.66 |
| NBI structure number | 44 0141L |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Monterey County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 1 Abandoned RR over Divarty Street | 1973 | 59,000 | Good |
| U.S. Highway 101 over Elkhorn Slough Tributary | 1930 | 59,000 | Fair |
| US 101 SB S101 Off over Little Bear Creek | 1965 | 49,000 | Good |
| US Highway 101 NB over Little Bear Creek | 1965 | 49,000 | Good |
| US Highway 101 SB over N101-abbott&abbott-s101 | 1954 | 41,000 | Good |
| US Highway 101 SB over Alisal Road | 1954 | 41,000 | Good |
All bridges nearby: Monterey County, CA bridge conditions · every bridge in Monterey County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.