Lambert Lane over Robinson Creek
Mendocino County, California · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Lambert Lane over Robinson Creek in Mendocino County, California, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 0 (failed condition, out of service) on the 0-9 scale.
- It was built in 1954, making it 71 years old at the 2025 inventory.
- It carries about 379 vehicles a day (traffic count year 2014).
- Its listed owner is the county highway agency.
- It is one of 27 of the 356 inventoried bridges in Mendocino County rated poor (7.6%); 27 (7.6%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated February 2024, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 0): scour critical: bridge has failed and is closed to traffic.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (39.00837, -123.36848)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 0 | 0 | Failed condition, out of service |
Bridge details
| Structure | Concrete slab |
| Length | about 28 ft |
| Location | 0.1 Mi W of SR 128 |
| NBI structure number | 10C0146 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | February 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 0: scour critical: bridge has failed and is closed to traffic |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Mendocino County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| State Route 1 over Pudding Creek | 1959 | 23,950 | Good |
| State Route 001 over Noyo River & Harbor Dr | 2005 | 23,950 | Good |
| U.S. Highway 101 over Austin Creek | 1964 | 20,900 | Good |
| North State St over Forsythe Creek | 1949 | 20,200 | Fair |
| U.S. Highway 101 over Ncrra/nwp RR | 1957 | 19,000 | Fair |
| U.S. Highway 101 over Baker Creek | 1971 | 19,000 | Good |
All bridges nearby: Mendocino County, CA bridge conditions · every bridge in Mendocino County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.