Bridge conditions in Knox County, Indiana
290 inventoried bridges · 13 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 290 bridges in Knox County: 117 rated good, 160 fair, and 13 poor.
- 13 of the 290 bridges in Knox County, Indiana, are rated in poor condition (4.5%) in the 2025 National Bridge Inventory, as of .
- 117 bridges (40.3%) are rated good and 160 (55.2%) fair.
- The median Knox County bridge was built in 1982.
- The busiest poor-rated bridge is Tr 257 over Wabash River (built 1906), carrying about 750 vehicles a day.
Good 40.3% · Fair 55.2% · Poor 4.5% of 290 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 |
|---|---|---|---|
| Tr 257 over Wabash River | 1906 | 750 | Poor |
| Nimnicht Road over Nimnicht Creek | 1995 | 170 | Poor |
| Sand Road over Black Creek | 1920 | 153 | Poor |
| Watson Road over Branch of Mariah Creek | 1925 | 141 | Poor |
| Hartley Road over Branch of White River | 1990 | 110 | Poor |
| Lucky Point Road over Kessinger Ditch | 1995 | 110 | Poor |
| Loudermilk Road over Flat Creek | 1940 | 50 | Poor |
| Kipp Road over Branch of Mariah Creek | 1920 | 50 | Poor |
| Hazelton Road over Overflow to White River | 1950 | 2 | Poor |
| Oil Field Road over Busseron Creek | 1895 | – | Poor |
| E Governors Road over Longpond and White River | 1900 | – | Poor |
| Pieper Road over Purdy Marsh | 1905 | – | Poor |
| Hazelton Road over White River/local Road | 1945 | – | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 41 NB over 2 City Streets CSX RR | 1961 | 21,710 | Good |
| US 41 SB over 2 City Streets CSX RR | 1961 | 21,710 | Good |
| US 41 NB (middle) over US 50 WB Ramp to US 41 S | 1967 | 19,317 | Good |
| Hart Street over US 41 Nb/sb | 1967 | 17,173 | Fair |
| US 41 NB over Snapp Creek | 1963 | 15,500 | Good |
| US 41 SB over Snapp Creek | 1963 | 15,500 | Good |
| US 41 over Beaver Ditch | 1971 | 11,711 | Fair |
| US 41 NB over Kelso Creek | 1967 | 11,254 | Fair |
| US 41 SB over Kelso Creek | 1967 | 11,254 | Good |
| US 41 NB over SR 441 Nb/sb | 1967 | 9,615 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Indiana: Indiana 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.