St Rte 99 & UP RR over Friant-kern Canal
Kern County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- St Rte 99 & UP RR over Friant-kern Canal in Kern County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1950, making it 75 years old at the 2025 inventory.
- It carries about 59,000 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 299 of the 668 inventoried bridges in Kern County rated fair (44.8%); 37 (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 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 → (35.6309, -119.2159)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 41 ft |
| Location | 06-ker-099-46.32 |
| NBI structure number | 50 0144 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 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 Kern County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 99 over Kern River | 1961 | 140,000 | Fair |
| State Route 99 over BNSF Ry & Amtrak | 1961 | 132,000 | Good |
| State Route 99 over California Avenue | 1963 | 132,000 | Good |
| State Route 99 over SR 178 (rosedale Hwy) | 1963 | 132,000 | Good |
| State Route 99 over Truxtun Ave | 1963 | 132,000 | Good |
| State Route 99 over Canal Lateral 29 | 1933 | 130,000 | Good |
All bridges nearby: Kern County, CA bridge conditions · every bridge in Kern County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.