US50/US400 Hwy over Arkansas River Drainage
Gray County, Kansas · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US50/US400 Hwy over Arkansas River Drainage in Gray County, Kansas, 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 1933 and reconstructed in 1970, making it 92 years old at the 2025 inventory.
- It carries about 6,720 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 49 of the 71 inventoried bridges in Gray County rated good (69.0%); 0 (0.0%) 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 January 2025, 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 → (37.80278, -100.31611)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 7 | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 25 ft |
| Location | 1.83 Mi E K23 |
| NBI structure number | 999905000350121 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | January 2025 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Kansas department of transportation.
Busiest bridges in Gray County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US50/US400 Hwy over Arkansas River Drainage | 1933 | 6,720 | Good |
| US50/US400 Hwy over Arkansas River Drainage | 1937 | 6,720 | Good |
| US50/US400 Hwy over Arkansas River Drainage | 1937 | 6,720 | Good |
| US50/US400 Hwy over Arkansas River Drainage | 1937 | 6,720 | Good |
| US50/US400 Hwy over Arkansas River Drainage | 1955 | 5,746 | Good |
| US50/US400 Hwy over Arkansas River Drainage | 1931 | 5,746 | Fair |
All bridges nearby: Gray County, KS bridge conditions · every bridge in Gray County · Kansas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.