US81 Hwy SB over K18 Highway
Ottawa County, Kansas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US81 Hwy SB over K18 Highway in Ottawa County, Kansas, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1969, making it 56 years old at the 2025 inventory.
- It carries about 3,848 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 164 of the 295 inventoried bridges in Ottawa County rated fair (55.6%); 11 (3.7%) are rated poor.
- 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 → (39.01611, -97.64139)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous concrete multiple box beam |
| Length | about 242 ft |
| Location | Jct K18/us81 SB |
| NBI structure number | 999908100720031 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Kansas department of transportation.
Busiest bridges in Ottawa County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US81 Hwy SB over Lindsey Creek | 1949 | 4,884 | Good |
| US81 Hwy SB over Pipe Creek | 1949 | 4,884 | Good |
| US-81 Hwy NB over Lindsey Creek | 1996 | 4,884 | Good |
| US-81 Hwy NB over Pipe Creek | 1996 | 4,884 | Good |
| US81 Hwy SB over Local Road | 1969 | 4,453 | Good |
| US81 Hwy NB over Local Road | 1969 | 4,453 | Good |
All bridges nearby: Ottawa County, KS bridge conditions · every bridge in Ottawa County · Kansas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.