Bridge conditions in Thomas County, Kansas
82 inventoried bridges · 2 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Thomas County tracks close to typical: 2 of its 82 inventoried bridges (2.4%) are rated poor, against a national rate of about 7%.
- 2 of the 82 bridges in Thomas County, Kansas, are rated in poor condition (2.4%) in the 2025 National Bridge Inventory, as of .
- 51 bridges (62.2%) are rated good and 29 (35.4%) fair.
- The median Thomas County bridge was built in 1965.
- The busiest poor-rated bridge is I70 Hwy Wl-el over S Fork Solomon River (built 1966), carrying about 6,400 vehicles a day.
Good 62.2% · Fair 35.4% · Poor 2.4% of 82 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I70 Hwy Wl-el over S Fork Solomon River | 1966 | 6,400 | Poor |
| County Rd 21 over South Fork Saline River | 1930 | 30 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| K25 Hwy over Prairie Dog Creek Drg | 1965 | 7,096 | Fair |
| US24 Hwy over Prairie Dog Creek Drg | 1938 | 6,605 | Good |
| I70 Hwy Wl-el over S Fork Solomon River | 1966 | 6,400 | Poor |
| I-70 Highway over N Fork Solomon River | 1965 | 6,350 | Good |
| I-70 Hwy Westbound over Union Pacific Railroad | 1965 | 6,350 | Good |
| I-70 Hwy Eastbound over Union Pacific Railroad | 1965 | 6,350 | Good |
| I-70 Highway over S Fk Solomon R Drain | 1965 | 6,350 | Good |
| I-70 Highway over Prairie Dog Creek Drg | 1966 | 6,200 | Fair |
| I-70 Highway over Prairie Dog Creek | 1966 | 6,200 | Fair |
| I-70 Highway over Prairie Dog CR Drain | 1966 | 6,200 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Kansas: Kansas bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.