Bridge conditions in DeKalb County, Illinois
262 inventoried bridges · 33 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
About one in 8 bridges in DeKalb County is rated in poor condition: 33 of 262 on the federal inventory, one of the higher shares in Illinois.
- 33 of the 262 bridges in DeKalb County, Illinois, are rated in poor condition (12.6%) in the 2025 National Bridge Inventory, as of .
- 103 bridges (39.3%) are rated good and 126 (48.1%) fair.
- The median DeKalb County bridge was built in 1982.
- The busiest poor-rated bridge is Annie Glidden Rd. over Watson Creek (built 1971), carrying about 13,600 vehicles a day.
Good 39.3% · Fair 48.1% · Poor 12.6% of 262 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 |
|---|---|---|---|
| Annie Glidden Rd. over Watson Creek | 1971 | 13,600 | Poor |
| Il 64 Fap 17 over Drainage Ditch | 1937 | 4,500 | Poor |
| Il 23 over Deer Creek Trib. | 1987 | 3,600 | Poor |
| Glidden Rd over Lee Slough Creek | 1997 | 3,550 | Poor |
| FAS-96 (Somonauk R over Buck Br Somonauk Cr | 1996 | 3,250 | Poor |
| Glidden Rd over Lee Slough Creek | 1997 | 3,150 | Poor |
| FAU5336 (lucinda A over So Br Kishwaukee Riv | 1954 | 2,650 | Poor |
| Il 72 Fap 553 over Owens Creek | 1982 | 2,150 | Poor |
| FAS-176 (Perry Rd) over Br of Battle Creek | 1990 | 2,150 | Poor |
| North State Road over Deer Creek | 1999 | 1,300 | Poor |
| Hinckley Road over Battle Creek | 1977 | 1,100 | Poor |
| Chicago Rd over Little Indian Creek | 2003 | 1,000 | Poor |
| Pearl St over So Br Kishwaukee Rv | 1949 | 1,000 | Poor |
| Airport Rd over Union Ditch #1 | 1947 | 900 | Poor |
| Pratt Road/ Ms 089 over Somonauk Creek | 1967 | 600 | Poor |
| Motel Road over Br S Br Kishwaukee R | 1980 | 525 | Poor |
| Waterman Road over Br of Somonauk Creek | 1985 | 425 | Poor |
| Pritchard Rd over W Br Little Rock Cre | 1967 | 350 | Poor |
| Howison Rd over Little Rock Creek | 1961 | 275 | Poor |
| Gov. Beveridge Hwy over Buck Branch | 1954 | 275 | Poor |
| Suydam Road over Paw Paw Creek | 1983 | 200 | Poor |
| Wheeler Rd over Trimble Run | 1964 | 175 | Poor |
| New Lebanon Rd over Coon Creek | 1965 | 150 | Poor |
| New Lebanon Rd over Coon Creek | 1969 | 100 | Poor |
| Hartman Road over Union Drainage Ditch | 1971 | 100 | Poor |
| Anderland Road over N Br Kishwaukee Rv | 1960 | 100 | Poor |
| Tr-71 (aldrich Rd) over S Br Kishwaukee Rv | 1950 | 75 | Poor |
| Elva Rd over S Br Kishwaukee Rv | 1961 | 75 | Poor |
| Shabbona Grove Roa over Indian Creek | 1976 | 75 | Poor |
| Tr-96 (anderland R over So Br Kishwaukee Rv | 1972 | 25 | Poor |
| Watson Rd over Little Indian Creek | 1980 | 25 | Poor |
| Goble Road over Br of Indian Creek | 1985 | 25 | Poor |
| Haumesser Road over Brnch Kishwaukee Rv | 1968 | 10 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-88 over Stream | 1972 | 24,900 | Fair |
| I-88 over Stream | 1972 | 24,900 | Good |
| I-88 over Stream | 1972 | 24,900 | Fair |
| Peace Rd over Br Kishwaukee River | 1995 | 15,000 | Fair |
| Annie Glidden Rd. over Watson Creek | 1971 | 13,600 | Poor |
| Peace Rd over Br Kishwaukee River | 1996 | 12,800 | Fair |
| Il 38 Fap 567 over S Br Kishwaukee Rivr | 2007 | 12,700 | Good |
| I-88 EB over S Br Kishwaukee Riv. | 1974 | 12,450 | Good |
| I-88 WB over S Br Kishwaukee Riv. | 1974 | 12,450 | Good |
| I-88 WB over Ill 23 | 1974 | 12,450 | Good |
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.