Corbett Canyon Rd over Quien Sabe Creek
San Luis Obispo County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Corbett Canyon Rd over Quien Sabe Creek in San Luis Obispo County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1938, making it 87 years old at the 2025 inventory.
- It carries about 1,433 vehicles a day (traffic count year 2010).
- Its listed owner is the county highway agency.
- It is one of 170 of the 402 inventoried bridges in San Luis Obispo County rated fair (42.3%); 22 (5.5%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated July 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (35.18664, -120.57888)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 22 ft |
| Location | 0.8 Mi SE SR 227 |
| NBI structure number | 49C0155 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in San Luis Obispo County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. Highway 101 over Stenner Creek | 1978 | 62,000 | Good |
| U.S. Highway 101 over Perfuma Creek | 1948 | 56,000 | Good |
| US Highway 101 NB over Santa Maria River | 1962 | 56,000 | Fair |
| U.S. Highway 101 over Brisco Rd | 1956 | 56,000 | Good |
| U.S. Highway 101 over Whitehorse Draw | 1952 | 54,000 | Good |
| US Highway 101 over St Rte 41 (@PM15.96) | 2010 | 53,000 | Good |
All bridges nearby: San Luis Obispo County, CA bridge conditions · every bridge in San Luis Obispo County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.