15TH St over Newhall Crk
Los Angeles County, California · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- 15TH St over Newhall Crk in Los Angeles County, California, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1978, making it 47 years old at the 2025 inventory.
- It carries about 11,536 vehicles a day (traffic count year 2014).
- Its listed owner is a city or municipal highway agency.
- It is one of 2,203 of the 3,549 inventoried bridges in Los Angeles County rated good (62.1%); 94 (2.6%) are rated poor.
- 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 → (34.38769, -118.53501)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 37 ft |
| Location | 0.1MI W/o San Frndo Rd |
| NBI structure number | 53C1544 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Los Angeles County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 60 over Prospectors Road | 1970 | 339,000 | Good |
| Route 60 over E60-n57 Connector Ramp | 1970 | 339,000 | Good |
| Interstate 110 over Washington Blvd | 1954 | 300,000 | Good |
| Interstate 110 over 37TH Street | 1996 | 300,000 | Good |
| Interstate 110 over Martin Luther King Jr Bl | 1956 | 300,000 | Good |
| Interstate 110 over Slauson Ave & BNSF Ry | 1996 | 300,000 | Poor |
All bridges nearby: Los Angeles County, CA bridge conditions · every bridge in Los Angeles County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.