DeKalb County, IL

264 public highway bridges

DeKalb County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, DeKalb County, Illinois contains 264 public highway bridges. Roughly 38.3% are rated “Good,” 42.4% “Fair,” and 12.5% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

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

264
Total Bridges
38.3%
Good
42.4%
Fair
12.5%
Poor Condition

Condition Distribution

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

All Bridges (264)

FAS-96 (Somonauk R

Poor

Over: Buck Br Somonauk Cr

110N , 1460E, DeKalb, IL

Built 1996 Load: 31.8 t ADT: 3,250

SUYDAM ROAD

Poor

Over: PAW PAW CREEK

180N 200E, DeKalb, IL

Built 1983 Load: 32.1 t ADT: 200

MOTEL ROAD

Poor

Over: BR S BR KISHWAUKEE R

2610N 1200E, DeKalb, IL

Built 1980 Load: 32.7 t ADT: 525

HOWISON RD

Poor

Over: LITTLE ROCK CREEK

1210N 1200E, DeKalb, IL

Built 1961 Load: 32.7 t ADT: 275

IL 64 FAP 17

Poor

Over: DRAINAGE DITCH

2.3 MI W SYCAMORE, DeKalb, IL

Built 1937 Load: 33.0 t ADT: 4,500

WATERMAN ROAD

Poor

Over: BR OF SOMONAUK CREEK

1015N 900E, DeKalb, IL

Built 1985 Load: 33.0 t ADT: 425

FAS-176 (Perry Rd)

Poor

Over: Br of Battle Creek

1500N 1540E, DeKalb, IL

Built 1990 Load: 33.4 t ADT: 2,150

CHICAGO RD

Poor

Over: LITTLE INDIAN CREEK

4 MI S OF WATERMAN, DeKalb, IL

Built 2003 Load: 34.7 t ADT: 1,000

Annie Glidden Rd.

Poor

Over: Watson Creek

0.5mi. N. of 38, DeKalb, IL

Built 1971 Load: 36.3 t ADT: 13,600

GLIDDEN RD

Poor

Over: LEE SLOUGH CREEK

3120N 850E, DeKalb, IL

Built 1997 Load: 36.9 t ADT: 3,150

IL 23

Poor

Over: DEER CREEK TRIB.

1 MI N JCT ILL 72, DeKalb, IL

Built 1987 Load: 37.9 t ADT: 3,600

NORTH STATE ROAD

Poor

Over: DEER CREEK

3310N 1310E, DeKalb, IL

Built 1999 Load: 37.9 t ADT: 1,300

HINCKLEY ROAD

Poor

Over: BATTLE CREEK

1140N 1600F, DeKalb, IL

Built 1977 Load: 38.9 t ADT: 1,100

ELVA RD

Poor

Over: S BR KISHWAUKEE RV

1600N 710E, DeKalb, IL

Built 1961 Load: 44.4 t ADT: 75

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

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Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.