RS 503 - SE 20 Ave over N. Fork Ninnescah River
Stafford County, Kansas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- RS 503 - SE 20 Ave over N. Fork Ninnescah River in Stafford 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 1988, making it 37 years old at the 2025 inventory.
- It carries about 35 vehicles a day (traffic count year 2021).
- Its listed owner is the county highway agency.
- It is one of 63 of the 119 inventoried bridges in Stafford County rated fair (52.9%); 3 (2.5%) 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 November 2024, on a 24-month routine inspection cycle.
- 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 → (37.83792, -98.71061)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 29 ft |
| Location | 2.0E 11.1S of St. John |
| NBI structure number | 000000000930045 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | November 2024 |
| 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 Stafford County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US50 Hwy over N F Ninnescah Riv Drg | 1954 | 3,765 | Good |
| US50 Hwy over Wild Horse CR Drain | 1957 | 2,873 | Good |
| US50 Hwy over N F Ninnescah Riv Drg | 1958 | 2,750 | Good |
| US50 Hwy over N F Ninnescah Riv Drg | 1954 | 2,555 | Good |
| US50 Hwy over N F Ninnescah Riv Drg | 1954 | 2,555 | Good |
| US281 Hwy over BNSF RR | 1986 | 2,409 | Good |
All bridges nearby: Stafford County, KS bridge conditions · every bridge in Stafford County · Kansas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.