Ill 18 over Drainage Ditch
Putnam County, Illinois · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ill 18 over Drainage Ditch in Putnam County, Illinois, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 3 (serious condition) on the 0-9 scale.
- It was built in 1932 and reconstructed in 1979, making it 93 years old at the 2025 inventory.
- It carries about 2,100 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 3 of the 50 inventoried bridges in Putnam County rated poor (6.0%); 3 (6.0%) are rated poor.
- 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 → (41.10439, -89.3196)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 3 | Serious condition |
| Superstructure | 3 | Serious condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 67 ft |
| Location | 0.65 Mi E of Ill 26 |
| NBI structure number | 078001300000000 |
| Condition class | Poor |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Putnam 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 |
All bridges nearby: Putnam County, IL bridge conditions · every bridge in Putnam County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.