K99 Hwy over Dow Creek
Lyon County, Kansas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- K99 Hwy over Dow Creek in Lyon County, Kansas, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1985, making it 40 years old at the 2025 inventory.
- It carries about 1,436 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 172 of the 494 inventoried bridges in Lyon County rated fair (34.8%); 4 (0.8%) 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 → (38.46194, -96.17083)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 162 ft |
| Location | 3.05 Mi N I35 |
| NBI structure number | 999909900561361 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Kansas department of transportation.
Busiest bridges in Lyon County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| URB1105 Indust over I-35 Hwy | 1994 | 12,935 | Good |
| US50 Hwy over Cottonwood Riv Drain | 1947 | 12,887 | Fair |
| I-35HWY over Lincoln St | 1965 | 10,914 | Fair |
| I-35 Hwy over Lincoln St | 2024 | 10,914 | Good |
| I-35 Hwy SB (kta) over Local Road Phenis Creek | 1956 | 9,014 | Good |
| I-35 Hwy NB (kta) over Local Road Phenis Creek | 1956 | 9,014 | Good |
All bridges nearby: Lyon County, KS bridge conditions · every bridge in Lyon County · Kansas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.