Bridge conditions in Putnam County, Illinois
50 inventoried bridges · 3 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Putnam County tracks close to typical: 3 of its 50 inventoried bridges (6.0%) are rated poor, against a national rate of about 7%.
- 3 of the 50 bridges in Putnam County, Illinois, are rated in poor condition (6.0%) in the 2025 National Bridge Inventory, as of .
- 14 bridges (28.0%) are rated good and 33 (66.0%) fair.
- The median Putnam County bridge was built in 1991.
- The busiest poor-rated bridge is Ill 29 over Senachwine Creek (built 1962), carrying about 3,200 vehicles a day.
Good 28.0% · Fair 66.0% · Poor 6.0% of 50 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 |
|---|---|---|---|
| Ill 29 over Senachwine Creek | 1962 | 3,200 | Poor |
| Ill 18 over Drainage Ditch | 1932 | 2,100 | Poor |
| Ill 26/FAS 2370 over Drainage Ditch | 1956 | 800 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Il 89 over Unnamed Stream | 2001 | 5,450 | Fair |
| Ill 71 over Drainage Ditch | 2015 | 4,700 | Good |
| Il 71 over Intermittent Stream | 2007 | 4,100 | Good |
| Ill 89 over Allforks Creek North | 2012 | 4,100 | Good |
| Ill 89 over Allforks Creek South | 2012 | 4,100 | Good |
| Ill 71 over Coffee Creek | 1977 | 3,600 | Fair |
| Ill 71 over Coffee Creek | 1993 | 3,400 | Fair |
| Ill 29 over Senachwine Creek | 1962 | 3,200 | Poor |
| Ill 29 over Senachwine CR Trib | 1963 | 3,200 | Good |
| Ill 29 over Ill River Trib | 1960 | 3,200 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Illinois: Illinois 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.