K99 Hwy over Allen Creek
Lyon County, Kansas · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- K99 Hwy over Allen Creek in Lyon 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 1985, making it 40 years old at the 2025 inventory.
- It carries about 1,724 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 318 of the 494 inventoried bridges in Lyon County rated good (64.4%); 4 (0.8%) 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 June 2024, 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 → (38.43639, -96.17056)
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 steel stringer or multi-beam girder |
| Length | about 265 ft |
| Location | 1.29 Mi N I35 |
| NBI structure number | 999909900561351 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| 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 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.