Old Cottonwood CR over Cottonwood Creek
Siskiyou County, California · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Old Cottonwood CR over Cottonwood Creek in Siskiyou County, California, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 0 (failed condition, out of service) on the 0-9 scale.
- It was built in 1957, making it 68 years old at the 2025 inventory.
- It carries about 10 vehicles a day (traffic count year 2011).
- Its listed owner is the county highway agency.
- It is one of 25 of the 425 inventoried bridges in Siskiyou County rated poor (5.9%); 25 (5.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, temporary structure in place to carry legal loads while the original structure is closed awaiting replacement or rehabilitation (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: superstructure 3 to 4.
- Its most recent inspection on record is dated August 2023, on a 24-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 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 → (41.93267, -122.58732)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 0 | 0 | Failed condition, out of service |
| Superstructure | 3 | 4 | Poor condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Steel through truss |
| Length | about 83 ft |
| Location | 0.2 Mi E/o Cottonwood Ck |
| NBI structure number | 02C0068 |
| Condition class | Poor |
| Traffic status (item 41) | Open, temporary structure in place to carry legal loads while the original structure is closed awaiting replacement or rehabilitation |
| Last inspection (item 90) | August 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the California department of transportation.
Busiest bridges in Siskiyou County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Interstate 5 SB over UP RR & Amtrak | 1964 | 20,000 | Fair |
| Interstate 5 NB over UP RR & Amtrak | 1964 | 20,000 | Fair |
| Interstate 5 over Mott Road | 1976 | 20,000 | Good |
| Interstate 5 over Mott Road | 1976 | 20,000 | Fair |
| Interstate 5 over Dunsmuir Ave | 1976 | 19,200 | Good |
| Interstate 5 over Sacramento UP RR Amtrak | 1955 | 18,000 | Good |
All bridges nearby: Siskiyou County, CA bridge conditions · every bridge in Siskiyou County · California bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.