McHenry County, IL

229 public highway bridges

McHenry County Bridge Snapshot

McHenry County, Illinois contains 229 public highway bridges in the FHWA National Bridge Inventory. Roughly 37.1% are rated “Good,” 36.7% “Fair,” 20.1% “Poor,” and 20.1% 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.

229
Total Bridges
37.1%
Good
20.1%
Poor
20.1%
Structurally Deficient

Condition Distribution

Good
37.1% (85)
Fair
36.7% (84)
Poor
20.1% (46)
SD
20.1% (46)

All Bridges (229)

HEMMINGSON RD.

Good

Over: S.BR.KISHWAUKEE RIV.

2.0M.E.OF UNION, McHenry, IL

Built 1991 Load: 43.4 t ADT: 500

North Union Road

Good

Over: Kishwaukee River

.8 MI N IL 176, McHenry, IL

Built 2019 Load: 43.4 t ADT: 500

US 14

Good

Over: MOKELER CREEK

US 14 N OF IL 173, McHenry, IL

Built 2006 Load: 44.4 t ADT: 12,400

EDGEWOOD ROAD

Good

Over: RAT CREEK

0.2 W IL 31, McHenry, IL

Built 1954 Load: 44.7 t ADT: 4,750

IL 23

Good

Over: KISHWAUKEE RV RELIEF

1.4 MI. N. US 20, McHenry, IL

Built 2009 Load: 45.0 t ADT: 6,450

HILL ROAD

Good

Over: N BR NIPPERSINK CRK

0.35 MI E / US 12, McHenry, IL

Built 2014 Load: 45.7 t ADT: 750

US 14

Good

Over: LAWRENCE CREEK

1.84 S STATE LINE, McHenry, IL

Built 2015 Load: 46.0 t ADT: 6,500

IL 176

Good

Over: OVERLAND FLOW AREA

0.31 M W N UNION RD, McHenry, IL

Built 2008 Load: 46.3 t ADT: 5,700

IL 31 NB EXIT RAM

Good

Over: CRYSTAL CREEK

0.1 M S Algonquin Rd, McHenry, IL

Built 2013 Load: 46.3 t ADT: 1,200

IL 173

Good

Over: PISCASAW CR OVERFLOW

1.88 M E OF CO. LINE, McHenry, IL

Built 2007 Load: 46.7 t ADT: 4,550

RANDALL RD

Good

Over: CREEK

RANDALL RD AT, McHenry, IL

Built 1970 Load: 48.0 t ADT: 28,800

IL 176

Good

Over: DRAINAGE DITCH

.2M E OF IL23, McHenry, IL

Built 2012 Load: 48.6 t ADT: 5,700

BARNARDS MILL ROAD

Good

Over: NIPPERSINK CR

AT HOWE RD INTERSECT, McHenry, IL

Built 1950 Load: 48.6 t ADT: 4,200

IL 47

Good

Over: KISHWAUKEE RIVER

4.7M S of US14, McHenry, IL

Built 2021 Load: 48.9 t ADT: 18,600

HEMMINGSON ROAD

Good

Over: TRIB S BR KSHWKE RVR

.55 MI E OLSEN RD, McHenry, IL

Built 1940 Load: 48.9 t ADT: 500

IL 31 SB ENT RAMP

Good

Over: CRYSTAL CREEK

0.1 M S Algonquin Rd, McHenry, IL

Built 2013 Load: 50.2 t ADT: 1,500

Main Street

Good

Over: Crystal Lake Overflo

200 ft S of IL 62, McHenry, IL

Built 2020 Load: 50.2 t ADT: 5,750

LAWRENCE ROAD/CH-T

Good

Over: LAWRENCE CREEK

.3MI NW OAK GROVE RD, McHenry, IL

Built 2011 Load: 50.9 t ADT: 400

IL 173

Good

Over: PISCASAW CREEK

2 M E OF CNTY LINE, McHenry, IL

Built 2007 Load: 51.2 t ADT: 4,550

I-90 WB

Good

Over: COON CREEK

0.5 MI E ANTHONY RD, McHenry, IL

Built 2013 Load: 51.5 t ADT: 28,500

I-90 EB

Good

Over: COON CREEK

0.5 MI E/ ANTHONY RD, McHenry, IL

Built 2013 Load: 51.5 t ADT: 28,500

CHARLES RD

Good

Over: SILVER CR

0.6 M NW OF ILL 47, McHenry, IL

Built 1978 Load: 51.8 t ADT: 6,500

DUNHAM ROAD/CHA-29

Good

Over: N BR KISHWAUKEE RIV

1.2 MI W OF US 14, McHenry, IL

Built 2011 Load: 52.8 t ADT: 250

OAK GROVE ROAD

Good

Over: DRAINAGE DITCH

.7 MI SW US 14, McHenry, IL

Built 2018 Load: 53.8 t ADT: 775

JOHNSBURG ROAD

Good

Over: DUTCH CREEK

.6 M E IL RT31, McHenry, IL

Built 1994 Load: 54.4 t ADT: 13,500

IL 31

Good

Over: CRYSTAL CREEK

0.1 M S Algonquin Rd, McHenry, IL

Built 2013 Load: 56.1 t ADT: 17,900

RANDALL ROAD

Good

Over: WOODS CREEK

0.3 M S OF MILLER RD, McHenry, IL

Built 1969 Load: 56.1 t ADT: 28,800

MASON HILL RD

Good

Over: STREAM

0.6 MI W CRYST LK RD, McHenry, IL

Built 1967 Load: 56.7 t ADT: 2,600

IL 176

Good

Over: KISHWAUKEE RIVER

0.9 M W OF GEE RD, McHenry, IL

Built 2008 Load: 57.3 t ADT: 8,600

IL 47

Good

Over: S BR KISHWAUKEE RV

2.3 M N of I-90, McHenry, IL

Built 2011 Load: 58.6 t ADT: 25,200

TR-155 (Justen Rd)

Good

Over: Trib. Fox River

0.5 MI N WRIGHT RD, McHenry, IL

Built 2018 Load: 60.6 t ADT: 675

IL 23

Good

Over: KISHWAUKEE RIVER

0.7 M N OF IL 176, McHenry, IL

Built 2009 Load: 62.5 t ADT: 6,450

COLLINS ROAD

Good

Over: TRIB N BR KISWKE RVR

.25 MI E SULLIVAN RD, McHenry, IL

Built 1968 Load: 66.4 t ADT: 725

PIONEER RD

Poor

Over: NIPPERSINK CREEK

0.7 M S W SOLON RD, McHenry, IL

Built 1982 ADT: 325

GRAF ROAD

Poor

Over: PISCASAW CREEK

0.4 MI E OF MAXON RD, McHenry, IL

Built 1998 ADT: 375

FLAT IRON ROAD

Poor

Over: MOKELER CREEK

0.4 MI. S. ILL 173, McHenry, IL

Built 1950 Load: 9.7 t ADT: 1,550

PLEASANT VALLEY RD

Poor

Over: KISHWAUKEE RIVER

0.2 MI W OF MCCUE RO, McHenry, IL

Built 1978 Load: 11.3 t ADT: 325

MURRAY ROAD

Poor

Over: SLOUGH CREEK

.15 MI N NELSON RD, McHenry, IL

Built 1968 Load: 14.3 t ADT: 225

FAU-165 (W Solon R

Poor

Over: N Br Nippersink Cr

0.5M E IL-31, McHenry, IL

Built 1983 Load: 14.6 t ADT: 325

COUNTY LINE RD

Poor

Over: PISCASAW CREEK

2.5 MI SE OF CAPRON, McHenry, IL

Built 1959 Load: 17.2 t ADT: 475

FROHLING RD

Poor

Over: S BR KISHWAUKEE

1.1 MI SE OF SEEMANN, McHenry, IL

Built 1978 Load: 17.8 t ADT: 325

PERKINS RD

Poor

Over: FRANKLINVILLE CR

0.05 MI E FRANLINVIL, McHenry, IL

Built 1980 Load: 18.8 t ADT: 725

BUNKER HILL ROAD

Poor

Over: RUSH CREEK

0.8 MI W OF IL 23, McHenry, IL

Built 1962 Load: 19.1 t ADT: 100

KUNDE RD

Poor

Over: KISHWAUKEE RIVER

0.5 MI W OF FRANKLIN, McHenry, IL

Built 1985 Load: 19.1 t ADT: 75

THORNE RD

Poor

Over: KISHWAUKEE RIV

3.0 MI W OF MARENGO, McHenry, IL

Built 1992 Load: 19.8 t ADT: 275

BULL VALLEY ROAD

Poor

Over: BOONE CREEK

0.2 MI E OF CURRAN R, McHenry, IL

Built 1969 Load: 21.4 t ADT: 9,300

MELODY LANE

Poor

Over: SILVER CREEK

0.09M.W. OFIL-47, McHenry, IL

Built 1984 Load: 22.0 t ADT: 1,050

US 12

Poor

Over: N BR NIPPERSINK CRK

0.5 M S E OF IL 31, McHenry, IL

Built 1990 Load: 22.4 t ADT: 8,250

STREIT ROAD

Poor

Over: PISCASAW CREEK

0.4 MI E OF COUNTY, McHenry, IL

Built 1959 Load: 22.4 t ADT: 425

DARTMOOR DRIVE

Poor

Over: BOONE CREEK

0.6 MI E CURRAN, McHenry, IL

Built 1998 Load: 23.0 t ADT: 2,550

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

Related

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