US73 K20 Hwy over Mission Creek
Brown County, Kansas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US73 K20 Hwy over Mission Creek in Brown 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 1966, making it 59 years old at the 2025 inventory.
- It carries about 1,772 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 117 of the 256 inventoried bridges in Brown County rated fair (45.7%); 11 (4.3%) 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 → (39.66722, -95.51778)
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 slab |
| Length | about 132 ft |
| Location | 0.42 Mi E Ejct US159 |
| NBI structure number | 999907300070081 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Kansas department of transportation.
Busiest bridges in Brown County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US75 Hwy over Craig Creek Drainage | 1956 | 5,099 | Good |
| US-75 Hwy over Craig Creek Drainage | 1995 | 5,099 | Good |
| US-75 Hwy over Main Street | 2003 | 4,709 | Good |
| US-75 Hwy over Old K-246 Hwy UP RR | 2003 | 4,709 | Good |
| US75 Hwy over Delaware River Dr | 1954 | 4,596 | Good |
| US-75 Hwy over Plum Creek | 1995 | 4,596 | Good |
All bridges nearby: Brown County, KS bridge conditions · every bridge in Brown County · Kansas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.