Midway Rd over Lost Slough
Butte County, California · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Midway Rd over Lost Slough in Butte County, California, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
- It was built in 1915 and reconstructed in 1945, making it 110 years old at the 2025 inventory.
- It carries about 1,380 vehicles a day (traffic count year 2018).
- 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 class is unchanged from 2024 (good), but component ratings moved: culvert 7 to 8.
- Its most recent inspection on record is dated November 2024, 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 → (39.56022, -121.76789)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 7 | 8 | Very good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 27 ft |
| Location | 0.6 Mi N of Nelson Rd |
| NBI structure number | 12C0042 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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.