DeKalb County, IL

264 public highway bridges

DeKalb County Bridge Snapshot

DeKalb County, Illinois contains 264 public highway bridges in the FHWA National Bridge Inventory. Roughly 38.3% are rated “Good,” 42.4% “Fair,” 12.5% “Poor,” and 12.5% are classified as structurally deficient — the federal designation for spans whose deck, superstructure, or substructure has been rated 4 or below on the 0–9 NBI scale. Structurally deficient does not mean unsafe to cross; it means the bridge is on the priority list for repair or replacement.

Inspections in IL are conducted by certified engineers from the state Department of Transportation on a 24-month cycle, and results are reported back to the FHWA each spring. The list below shows every NBI-tracked bridge in the county, sorted by inventory load rating. Use the “Sort by” controls to surface the lowest-rated spans first, and click any row for full inspection history, traffic counts, and condition trends.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

264
Total Bridges
38.3%
Good
12.5%
Poor
12.5%
Structurally Deficient

Condition Distribution

Good
38.3% (101)
Fair
42.4% (112)
Poor
12.5% (33)
SD
12.5% (33)

All Bridges (264)

PLANK ROAD

Fair

Over: COON CREEK

2800N 1750E, DeKalb, IL

Built 1941 Load: 27.5 t ADT: 7,300

S MALTA RD

Fair

Over: E BR KILLBUCK CREEK

2000N 120E, DeKalb, IL

Built 1955 Load: 27.5 t ADT: 450

CHASE ROAD/TR196A

Fair

Over: UNION DITCH NO 1

1890N 1500E, DeKalb, IL

Built 1932 Load: 27.5 t ADT: 25

PRESERVE RD

Fair

Over: SOMONAUK CREEK

900N 1165E, DeKalb, IL

Built 1951 Load: 27.5 t ADT: 50

SHABBONA GROVE RD

Fair

Over: LITTLE INDIAN CREEK

700N 740E, DeKalb, IL

Built 1955 Load: 27.9 t ADT: 275

E SANDWICH RD

Fair

Over: LITTLE ROCK CREEK BR

655N 1750E, DeKalb, IL

Built 1970 Load: 29.2 t ADT: 1,800

BARBER GREENE RD

Fair

Over: E BR KISHWAUKEE RV

2190N 1570E, DeKalb, IL

Built 1960 Load: 29.8 t ADT: 1,750

THOMPSON ROAD

Fair

Over: BR KISHWAUKEE RIVER

2550N 1055E, DeKalb, IL

Built 1995 Load: 30.8 t ADT: 50

WOLF RD

Fair

Over: S BR KISHWAUKEE RIV.

3350N 740E, DeKalb, IL

Built 1953 Load: 31.4 t ADT: 175

SHABBONA GROVE RD

Fair

Over: BR SOMONAUK CREEK

700N 1205E, DeKalb, IL

Built 1961 Load: 31.4 t ADT: 50

GOBLE RD

Fair

Over: BR PAW PAW RUN

230N 100E, DeKalb, IL

Built 1955 Load: 32.1 t ADT: 25

HILLCREST DRIVE

Fair

Over: S. Br of Kishwaukee Rive

0.2mi. E. of N. 1st., DeKalb, IL

Built 1964 Load: 32.1 t ADT: 9,200

CHICAGO RD

Fair

Over: SOMONAUK CREEK

550N 1405E, DeKalb, IL

Built 1946 Load: 32.4 t ADT: 1,550

SUYDAM RD

Fair

Over: SOMONAUK CREEK

145N 1565E, DeKalb, IL

Built 1955 Load: 32.4 t ADT: 1,950

SOMONAUK ROAD

Fair

Over: BR LITTLE ROCK CREEK

625N 1550E, DeKalb, IL

Built 1976 Load: 32.4 t ADT: 3,000

SOMONAUK ROAD

Fair

Over: W. BR. BIG ROCK CRK.

1150N 1510E, DeKalb, IL

Built 1993 Load: 32.4 t ADT: 2,400

GENOA ROAD

Fair

Over: DEER CREEK

3315N 1170E, DeKalb, IL

Built 1998 Load: 32.4 t ADT: 3,000

SHABBONA ROAD

Fair

Over: BIG INDIAN CREEK

820N 350E, DeKalb, IL

Built 2000 Load: 32.4 t ADT: 800

MALTA ROAD

Fair

Over: BR. OF OWENS CREEK

2675N 350E, DeKalb, IL

Built 2001 Load: 32.4 t ADT: 300

CHERRY VALLEY RD

Fair

Over: KINGSBURY CREEK

3560N 430E, DeKalb, IL

Built 2008 Load: 32.4 t ADT: 2,950

PERRY ROAD

Fair

Over: S BR KISHWAUKEE RV

1500N 630E, DeKalb, IL

Built 2009 Load: 32.4 t ADT: 1,800

SHABBONA RD

Fair

Over: BR INDIAN CRK

495N 300E, DeKalb, IL

Built 2009 Load: 32.4 t ADT: 475

SUYDAM RD

Fair

Over: LITTLE INDIAN CREEK

200N 615E, DeKalb, IL

Built 2007 Load: 32.4 t ADT: 425

PERRY RD

Fair

Over: YOUNG'S CREEK

1500N 1745E, DeKalb, IL

Built 2010 Load: 32.4 t ADT: 2,150

BASE LINE RD

Fair

Over: OWEN CREEK

3000N 365E, DeKalb, IL

Built 1966 Load: 32.4 t ADT: 300

COUNTY LINE ROAD

Fair

Over: BR S BR KISHWAUKEE R

3440N 030E, DeKalb, IL

Built 1980 Load: 32.4 t ADT: 150

PLEASANT HILL ROAD

Fair

Over: S BR KISHWAUKEE RV

3275N 1100E, DeKalb, IL

Built 1977 Load: 32.4 t ADT: 1,100

BASE LINE RD

Fair

Over: LEE SLOUGH CREEK

3000N, 885E, DeKalb, IL

Built 1997 Load: 32.4 t ADT: 1,100

COUNTY LINE ROAD

Fair

Over: BR OF COON CREEK

3550N 1900E, DeKalb, IL

Built 1980 Load: 32.4 t ADT: 500

SCHAFER RD

Fair

Over: OWENS CREEK

2750N 425E, DeKalb, IL

Built 1970 Load: 32.4 t ADT: 50

W. CLARE ROAD

Fair

Over: BRANCH OWENS CREEK

2650N 510E, DeKalb, IL

Built 1990 Load: 32.4 t ADT: 25

PEACE RD

Fair

Over: BR KISHWAUKEE RIVER

2545N 1235E, DeKalb, IL

Built 1995 Load: 32.4 t ADT: 15,000

PEACE RD

Fair

Over: BR KISHWAUKEE RIVER

2610N , 1265E, DeKalb, IL

Built 1996 Load: 32.4 t ADT: 12,800

PEACE ROAD

Fair

Over: UNION PACIFIC RR

0.3 M N OF IL RT 38, DeKalb, IL

Built 1985 Load: 32.4 t ADT: 7,600

GURLER RD. (FAS111

Fair

Over: BR S BR KISHWAUKEE R

1800N 850E, DeKalb, IL

Built 1992 Load: 32.4 t ADT: 450

PLEASANT STREET

Fair

Over: UNION DRAINAGE DITCH

2060N 1645E, DeKalb, IL

Built 1975 Load: 32.4 t ADT: 500

BETHANY ROAD

Fair

Over: E BR KISHWAUKEE RV

2280N 1590E, DeKalb, IL

Built 1982 Load: 32.4 t ADT: 425

WATERMAN ROAD

Fair

Over: BR S BR KISHWAUKEE R

1675N 900E, DeKalb, IL

Built 1979 Load: 32.4 t ADT: 25

HAUMESSER RD

Fair

Over: S BR KISHWAUKEE RIVE

1165N 350E, DeKalb, IL

Built 1986 Load: 32.4 t ADT: 25

HOWISON RD

Fair

Over: SOMONAUK CREEK

705N 1200E, DeKalb, IL

Built 1967 Load: 32.4 t ADT: 275

UNIVERSITY ROAD

Fair

Over: LITTLE INDIAN CREEK

800N 700E, DeKalb, IL

Built 1978 Load: 32.4 t ADT: 75

CREGO ROAD

Fair

Over: BR SOMONAUK CREEK

890N 1100E, DeKalb, IL

Built 1980 Load: 32.4 t ADT: 25

DUFFY ROAD

Fair

Over: SOMONAUK CREEK

1000N 1075E, DeKalb, IL

Built 1983 Load: 32.4 t ADT: 25

PRESERVE ROAD

Fair

Over: LITTLE INDIAN CREEK

900N 635E, DeKalb, IL

Built 1984 Load: 32.4 t ADT: 75

BASTIAN ROAD

Fair

Over: SOMONAUK CREEK

800N 1320E, DeKalb, IL

Built 1969 Load: 32.4 t ADT: 100

SHABBONA GROVE ROA

Fair

Over: SOMONAUK CREEK

700N 1270E, DeKalb, IL

Built 1978 Load: 32.4 t ADT: 50

SCOTT ROAD

Fair

Over: BIG ROCK CREEK

1000N 1715E, DeKalb, IL

Built 1980 Load: 32.4 t ADT: 125

W SANDWICH ROAD

Fair

Over: BR. LITTLR ROCK CRK.

615N 1630E, DeKalb, IL

Built 1979 Load: 32.4 t ADT: 50

SHABBONA GROVE ROA

Fair

Over: LITTLE ROCK CREEK

700N 1720E, DeKalb, IL

Built 1981 Load: 32.4 t ADT: 75

WESSON ROAD

Fair

Over: LITTLE INDIAN CREEK

350N 790E, DeKalb, IL

Built 1982 Load: 32.4 t ADT: 75

Read our methodology — how this data is sourced, computed, and verified.

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Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial