Road 23n28 over Chino Creek
Butte County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Road 23n28 over Chino Creek in Butte County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1981 and reconstructed in 2000, making it 44 years old at the 2025 inventory.
- It carries about 50 vehicles a day.
- It is one of 278 of the 440 inventoried bridges in Butte County rated fair (63.2%); 24 (5.5%) are rated poor.
- Its traffic status in the 2025 inventory is closed to all traffic (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: substructure 7 to 5.
- Its most recent inspection on record is dated September 2024, 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 → (39.73354, -121.40374)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 7 | 5 | Fair condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 40 ft |
| Location | No Data Entered |
| NBI structure number | 051154000001084 |
| Condition class | Fair |
| Traffic status (item 41) | Closed to all traffic |
| Last inspection (item 90) | September 2024 |
| 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 Butte County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Skyway over State Route 99 | 1965 | 37,400 | Good |
| State Route 99 over Dry Channel | 1953 | 32,600 | Good |
| State Route 99 over Scrub Creek | 1952 | 28,250 | Good |
| State Route 99 over Nance Canyon | 1952 | 28,250 | Good |
| Cohasset Hwy over State Route 99 | 1966 | 27,008 | Good |
| State Route 99 SB over Little Chico Creek | 1965 | 24,750 | Fair |
All bridges nearby: Butte County, CA bridge conditions · every bridge in Butte County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.