State Line Road over Knob Creek
Graves County, Kentucky · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- State Line Road over Knob Creek in Graves County, Kentucky, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1960, making it 65 years old at the 2025 inventory.
- It carries about 158 vehicles a day (traffic count year 2009).
- Its listed owner is the county highway agency.
- It is one of 40 of the 380 inventoried bridges in Graves County rated poor (10.5%); 40 (10.5%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2024, on a 12-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (36.5025, -88.67861)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 44 ft |
| Location | .9 Mi West of Ky 303 |
| NBI structure number | 042C00134N |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 12 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 Kentucky department of transportation.
Busiest bridges in Graves County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-45 over Key Creek | 1968 | 16,933 | Fair |
| Ky-121 over Red Duck Creek | 1999 | 13,901 | Good |
| Paducah Road over Oak Grove Creek | 1999 | 13,256 | Good |
| Ky. 80 over Unnamed Stream | 2007 | 12,060 | Good |
| Ky-121x over Red Duck Creek | 1984 | 11,705 | Good |
| Jc-9003 over Cane Creek | 1967 | 11,524 | Fair |
All bridges nearby: Graves County, KY bridge conditions · every bridge in Graves County · Kentucky bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.