Bridge conditions in Kendall County, Illinois
131 inventoried bridges · 15 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Kendall County has 15 bridges rated poor out of 131 inventoried, a 11.5% share that puts it well above the national rate of about 7%.
- 15 of the 131 bridges in Kendall County, Illinois, are rated in poor condition (11.5%) in the 2025 National Bridge Inventory, as of .
- 67 bridges (51.1%) are rated good and 49 (37.4%) fair.
- The median Kendall County bridge was built in 1994.
- The busiest poor-rated bridge is Baseline Rd/ms 199 over Rob Roy Creek (built 1966), carrying about 2,600 vehicles a day.
Good 51.1% · Fair 37.4% · Poor 11.5% of 131 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 |
|---|---|---|---|
| Baseline Rd/ms 199 over Rob Roy Creek | 1966 | 2,600 | Poor |
| Creek Rd over Little Rock Ck | 1995 | 2,300 | Poor |
| Schafer Rd over Rob Roy Ck | 1978 | 1,400 | Poor |
| Schlapp Rd over East Aux-sable CR | 1967 | 1,200 | Poor |
| Schlapp Rd/ms 360 over E.aux Sable CR. | 1930 | 950 | Poor |
| Walker Rd over Middle Aux Sable | 1965 | 825 | Poor |
| Holt Road over Aux Sable Creek | 1977 | 750 | Poor |
| Budd Rd over Hollenback Creek | 1978 | 625 | Poor |
| Ashley Rd over Middle Aux Sable | 2009 | 425 | Poor |
| Miller Rd over Little Rock Ck | 1978 | 300 | Poor |
| Chicago Rd/ms 362 over East Aux Sable Ck | 1970 | 225 | Poor |
| Mckanna Rd/tr 102 over Aux Sable Ck | 1980 | 225 | Poor |
| Brisbin RD/MS0020 over West Aux Sable Ck | 1971 | 175 | Poor |
| Van Dyke Rd over Middle Auxsable Ck | 1972 | 50 | Poor |
| Van Dyke Rd over E Branch Auxsable Ck | 1984 | 50 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ill 47 over Fox River | 1984 | 24,800 | Fair |
| US 34/FAP 311 over Waubansee Creek | 2002 | 24,700 | Fair |
| US 34 over Blackberry Creek | 2019 | 22,400 | Good |
| US 34 over Waubansee Creek | 2001 | 22,300 | Fair |
| US 34 over Rob Roy Creek | 2019 | 18,700 | Good |
| Orchard Rd over Gates Cr/trib to Fox | 2000 | 18,700 | Fair |
| Orchard Rd over Fox River & Omnitrax | 2000 | 18,700 | Fair |
| Orchard Road over B+n R.R | 1993 | 18,600 | Good |
| Douglas Rd over Waubansee CR | 2008 | 16,700 | Good |
| US 34 over Fox River | 1993 | 16,300 | 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.