K55 Hwy over Ninnescah River Drainage
Sumner County, Kansas · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- K55 Hwy over Ninnescah River Drainage in Sumner County, Kansas, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1966, making it 59 years old at the 2025 inventory.
- It carries about 1,878 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 331 of the 658 inventoried bridges in Sumner County rated good (50.3%); 16 (2.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 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 → (37.39222, -97.29111)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 102 ft |
| Location | 2.32 Mi E US81 |
| NBI structure number | 999905500961131 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Kansas department of transportation.
Busiest bridges in Sumner County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-35 Hwy SB (kta) over K-53 Hwy | 1956 | 12,849 | Good |
| I-35 Hwy NB (kta) over K-53 Hwy | 1956 | 12,849 | Good |
| U-160 Hwy over Hargis Creek | 2024 | 11,788 | Good |
| I-35 Hwy SB (kta) over BNSF Railway | 1956 | 11,227 | Fair |
| I-35 Hwy NB (kta) over BNSF Railway | 1956 | 11,227 | Fair |
| I-35 Hwy SB (kta) over Ninnescah River | 1956 | 11,227 | Fair |
All bridges nearby: Sumner County, KS bridge conditions · every bridge in Sumner County · Kansas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.