Nicholson Road over Annie Creek Slough
Klamath County, Oregon · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Nicholson Road over Annie Creek Slough in Klamath County, Oregon, 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 1960, making it 65 years old at the 2025 inventory.
- It carries about 344 vehicles a day (traffic count year 2020).
- Its listed owner is the county highway agency.
- It is one of 98 of the 248 inventoried bridges in Klamath County rated good (39.5%); 11 (4.4%) 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 March 2023, on a 24-month routine inspection cycle.
- 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 → (42.70472, -122.03119)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 25 ft |
| Location | 0185 Mi West of Hwy 62 |
| NBI structure number | 35C166141900185 |
| Condition class | Good |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Oregon department of transportation.
Busiest bridges in Klamath County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Or 140 (hwy 020) over Usrs Canal | 1930 | 20,461 | Fair |
| Or 140 (hwy 020) over Link River | 1931 | 19,357 | Fair |
| Or 140 (hwy 020) over City St & UPRR | 1957 | 19,357 | Fair |
| Shasta Way over A Canal | 1979 | 16,068 | Good |
| S Side Bypass over UPRR | 1986 | 11,928 | Fair |
| S Side Bypass over BNSF & Klamath River | 1986 | 11,850 | Good |
All bridges nearby: Klamath County, OR bridge conditions · every bridge in Klamath County · Oregon bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.