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Bridge conditions in DeKalb County, Illinois

262 inventoried bridges · 33 rated poor · 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

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 August 20, 2026.
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.

Every bridge in DeKalb County → - all 262, busiest first, each with its own condition record.

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.