Foothill Blvd over South Brnch Wyman Ravine
Butte County, California · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Foothill Blvd over South Brnch Wyman Ravine in Butte 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 1926 and reconstructed in 1973, making it 99 years old at the 2025 inventory.
- It carries about 1,470 vehicles a day (traffic count year 2019).
- Its listed owner is the county highway agency.
- It is one of 138 of the 440 inventoried bridges in Butte County rated good (31.4%); 24 (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 March 2023, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (39.4824, -121.50349)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 21 ft |
| Location | Just South Mt Ida Rd |
| NBI structure number | 12C0342 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
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.