IL3NB-255WB Ramp A over I 255 NB - Ramp D
Monroe County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- IL3NB-255WB Ramp A over I 255 NB - Ramp D in Monroe County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1982, making it 43 years old at the 2025 inventory.
- It carries about 25,850 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 42 of the 132 inventoried bridges in Monroe County rated fair (31.8%); 11 (8.3%) are rated poor.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (38.4739, -90.2285)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 5 | Fair condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 149 ft |
| Location | North of Columbia |
| NBI structure number | 067002500000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Monroe County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| IL3NB->255WB Rmp E over 255SB->IL3SB Ramp B | 1982 | 36,900 | Fair |
| Il 3 SB over Palmer Rd/Palmer Crk | 1991 | 36,900 | Fair |
| Ill 3 NB over Palmer Rd/Palmer Crk | 1984 | 30,200 | Fair |
| Fai 255 EB over Mississippi River | 1986 | 25,850 | Fair |
| Fai 255WB over Mississippi River | 1984 | 25,850 | Fair |
| Fai 255 Nb/eb over UPRR | 1984 | 25,850 | Poor |
All bridges nearby: Monroe County, IL bridge conditions · every bridge in Monroe County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.