Bridge conditions in DuPage County, Illinois
345 inventoried bridges · 26 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 345 bridges in DuPage County: 124 rated good, 195 fair, and 26 poor.
- 26 of the 345 bridges in DuPage County, Illinois, are rated in poor condition (7.5%) in the 2025 National Bridge Inventory, as of .
- 124 bridges (35.9%) are rated good and 195 (56.5%) fair.
- The median DuPage County bridge was built in 1988.
- The busiest poor-rated bridge is Il 38 over Winfield Creek (built 1982), carrying about 25,000 vehicles a day.
Good 35.9% · Fair 56.5% · Poor 7.5% of 345 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.
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-88 over I-355 | 1989 | 169,900 | Fair |
| I-88 over I-355 NB to I-88 WB | 1989 | 169,900 | Fair |
| I- 55 over Madison St | 1959 | 150,000 | Fair |
| I-355 NB & SB over US-34 | 1989 | 147,200 | Fair |
| I-355 over Bn RR | 1989 | 147,200 | Good |
| I-355 NB & SB over Hitchcock Ave. | 1989 | 147,200 | Fair |
| I88 WB E-w Toll over Naperville/wheat Rd | 2008 | 146,000 | Good |
| I-355 over Jackson Ave. | 1989 | 144,300 | Fair |
| I- 55 over Lemont Rd | 2022 | 130,800 | Good |
| I-355 NB & SB over Il-38 | 1989 | 126,000 | 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.