Mt Murphy Rd over South Fk American River
El Dorado County, California · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mt Murphy Rd over South Fk American River in El Dorado County, California, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1915 and reconstructed in 1931, making it 110 years old at the 2025 inventory.
- It carries about 284 vehicles a day (traffic count year 2019).
- Its listed owner is the county highway agency.
- It is one of 84 of the 192 inventoried bridges in El Dorado County rated fair (43.8%); 11 (5.7%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: substructure 5 to 6.
- Its most recent inspection on record is dated July 2024, on a 12-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- 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 → (38.80118, -120.89105)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel through truss |
| Length | about 482 ft |
| Location | 0.1 Mi E of SR 49 |
| NBI structure number | 25C0004 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 12 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in El Dorado County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| U.S. Highway 50 over Old Silva Valley Parkway | 1965 | 95,000 | Good |
| U.S. Highway 50 over Carson Creek | 1939 | 72,000 | Good |
| US Highway 50 over Latrobe Road | 2009 | 72,000 | Good |
| U.S. Highway 50 WB over Bass Lake Road | 1966 | 60,000 | Good |
| Missouri Flat Road over US Highway 50 | 2008 | 60,000 | Good |
| US Highway 50 over West Placerville Drive | 2009 | 40,000 | Good |
All bridges nearby: El Dorado County, CA bridge conditions · every bridge in El Dorado County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.