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)

ALGONQUIN ROAD

Good

Over: WOODS CRK W RANDALL

0.7 MI W RANDALL RD, McHenry, IL

Built 2007 Load: 25.9 t ADT: 22,300

Olcott Road

Good

Over: Unnamed Ditch

Olcott at Carmack, McHenry, IL

Built 2016 Load: 29.2 t ADT: 125

KEYSTONE ROAD

Good

Over: NIPPERSINK CR TRIB

0.9 MI S TRYON GROVE, McHenry, IL

Built 1990 Load: 29.8 t ADT: 1,300

RAWSON BRIDGE ROAD

Good

Over: FOX RIVER

.8 MI W LAKE CO LINE, McHenry, IL

Built 1982 Load: 30.5 t ADT: 6,050

O'BRIEN ROAD

Good

Over: NIPPERSINK CREEK

1.5 MI W OF IL 47, McHenry, IL

Built 1976 Load: 32.1 t ADT: 850

RAKOW RD (CH V-29)

Good

Over: CRYSTAL CREEK

0.24 MI. N OF ACKMAN, McHenry, IL

Built 1994 Load: 32.4 t ADT: 30,600

GRAF ROAD

Good

Over: LITTLE BEAVER CREEK

.1M E OF COUNTY LINE, McHenry, IL

Built 2005 Load: 32.4 t ADT: 250

MARENGO ROAD

Good

Over: MOKELER CREEK

0.1 S. OF ILL 173, McHenry, IL

Built 2014 Load: 32.4 t ADT: 2,350

CRYSTAL LAKE RD

Good

Over: WOODS CREEK

0.75 MI N ALGONQUIN, McHenry, IL

Built 2006 Load: 32.4 t ADT: 3,200

ACKMAN RD

Good

Over: TRIB KISHWAUKEE RVR

0.3 MI W IL 47, McHenry, IL

Built 2006 Load: 32.4 t ADT: 2,400

KREUTZER ROAD

Good

Over: S BRNCH KISHWKEE RVR

.5MI W OF IL 47, McHenry, IL

Built 2014 Load: 32.4 t ADT: 2,650

BULLVALLEY RD.

Good

Over: BOONE CREEK

.4M.W.VALLEY HILL RD, McHenry, IL

Built 1991 Load: 32.4 t ADT: 2,350

OAK STREET

Good

Over: CRYSTAL CR

.24M W OF PYOTT, McHenry, IL

Built 1993 Load: 32.4 t ADT: 1,950

Jessie Road

Good

Over: Crystal Creek

0.3 M W of Pyott Rd, McHenry, IL

Built 2014 Load: 32.4 t ADT: 450

Woods Creek Lane

Good

Over: Woods Creek

0.3 mi S of Bunker H, McHenry, IL

Built 2021 Load: 32.4 t ADT: 800

Bunker Hill Drive

Good

Over: Woods Creek

0.67 mi W Randall Road, McHenry, IL

Built 1999 Load: 32.4 t ADT: 6,500

CHARLES MILLER Rd

Good

Over: FOX RIVER

0.1 MI W RIVER RD, McHenry, IL

Built 2013 Load: 33.0 t ADT: 8,150

IL 173

Good

Over: MOKELLER CREEK

0.08 M W OF US 14, McHenry, IL

Built 1993 Load: 33.4 t ADT: 5,500

HARMONY ROAD

Good

Over: UNNAMED CREEK

.6M NW OF HARMDY HIL, McHenry, IL

Built 2004 Load: 34.3 t ADT: 2,350

IL 31 & 120

Good

Over: BOONE CREEK

1.6M W OF CHAPEL HIL, McHenry, IL

Built 1990 Load: 34.7 t ADT: 30,300

Jankowski Rd/ TR85

Good

Over: Slough Creek

0.7M W IL47, McHenry, IL

Built 1975 Load: 35.0 t ADT: 175

US 14

Good

Over: RUSH CREEK

1.2 S HARVARD, McHenry, IL

Built 1984 Load: 35.3 t ADT: 15,200

IL 31

Good

Over: DUTCH CREEK

6.2 M S OF US 12, McHenry, IL

Built 1978 Load: 35.3 t ADT: 23,400

ALLENDALE ROAD

Good

Over: BR NIPPERSINK CR

1.5 E IL 47, McHenry, IL

Built 2009 Load: 35.3 t ADT: 750

IL 23

Good

Over: KISHWAUKEE R OVERFLO

1.3 MI. N. US 20, McHenry, IL

Built 2009 Load: 36.0 t ADT: 6,450

ALGONQUIN ROAD

Good

Over: CRYSTAL CREEK

02M W OF PYOTT, McHenry, IL

Built 2004 Load: 36.3 t ADT: 31,600

FRANKLINVILLE RD

Good

Over: TRIB KISH RIVER

0.1 MI S PERKINS RD, McHenry, IL

Built 2016 Load: 36.3 t ADT: 1,500

CARMACK ROAD

Good

Over: RUSH CREEK

0.5 W COX ROAD, McHenry, IL

Built 1993 Load: 36.9 t ADT: 250

DEERPASS ROAD

Good

Over: KISH RIVER N CHANNEL

0.7 MI N IL RTE 176, McHenry, IL

Built 2019 Load: 36.9 t ADT: 1,650

MUSGRAVE PARKWAY

Good

Over: UNAMED TRIB COON CRK

0.4 MI W SEEMAN RD, McHenry, IL

Built 2005 Load: 37.3 t ADT: 100

ALGONQUIN ROAD

Good

Over: WOODS CREEK

.4M W OF PYOTT RD, McHenry, IL

Built 2004 Load: 37.9 t ADT: 31,600

UNION ROAD / CHT-6

Good

Over: S BR KISHWAUKEE RIV

0.5 MI S IL RTE 176, McHenry, IL

Built 2011 Load: 37.9 t ADT: 1,800

LAWRENCE RD

Good

Over: TRIB LAWRENCE CREEK

1 MI N OF RAMER RD, McHenry, IL

Built 2016 Load: 37.9 t ADT: 850

IL 173

Good

Over: MOKELLER CREEK

0.39 M W OF US 14, McHenry, IL

Built 1999 Load: 38.2 t ADT: 5,500

IL 173

Good

Over: MOKELLER CREEK

0.26 M W OF US 14, McHenry, IL

Built 1999 Load: 38.2 t ADT: 5,500

BOTTERMAN ROAD

Good

Over: UNAMED TRIB COON CRK

0.4 MI W SEEMAN RD, McHenry, IL

Built 2004 Load: 38.9 t ADT: 350

IL 176

Good

Over: KISHWAUKEE RIVER

2 M E OF IL 47, McHenry, IL

Built 2000 Load: 39.2 t ADT: 10,200

ALDEN ROAD

Good

Over: BR NIPPERSINK CREEK

0.2MI.N OF IL 173, McHenry, IL

Built 2010 Load: 39.2 t ADT: 2,300

GRAF ROAD/TR-37

Good

Over: LAWRENCE CREEK

.3MNW OAK GR/HARVARD, McHenry, IL

Built 2011 Load: 39.5 t ADT: 375

Kishwaukee Valley

Good

Over: Rush Creek Tributary

0.20 Mi E of Root Rd, McHenry, IL

Built 2021 Load: 39.9 t ADT: 3,600

IL 173

Good

Over: N BR NIPPERSINK CR

0.5 M W OF US 12, McHenry, IL

Built 1932 Load: 40.8 t ADT: 5,100

IL 176

Good

Over: S BR KISHWAUKEE RIV

1.1 M E IL 23, McHenry, IL

Built 2008 Load: 40.8 t ADT: 5,700

S. Harrison Street

Good

Over: Crystal Lake Overflo

0.1 MI S IL 62, McHenry, IL

Built 2023 Load: 40.8 t ADT: 1,400

MAIN STREET

Good

Over: S RBR. KISHWAUKEE

0.1MI W COYNE STA RD, McHenry, IL

Built 1961 Load: 41.5 t ADT: 9,500

BAY ROAD

Good

Over: LILY LAKE DRAIN

1.0 MI SE OF CHAPELH, McHenry, IL

Built 1968 Load: 41.5 t ADT: 6,200

ALGONQUIN ROAD

Good

Over: GRAVEL PIT CREEK

.2M SE OF PYOTT, McHenry, IL

Built 2004 Load: 41.5 t ADT: 31,600

FRANKLINEVILLE ROA

Good

Over: KISHWAUKEE RIVER

0.3 MI N IL-176, McHenry, IL

Built 2014 Load: 41.8 t ADT: 1,500

KISHWAUKEE VALLEY

Good

Over: N BR KISHWAUKEE RIV

0.3 MI E SULLIVAN RD, McHenry, IL

Built 2010 Load: 42.4 t ADT: 4,150

AYER STREET

Good

Over: MOKELER CREEK

0.36 MI W. US 14, McHenry, IL

Built 2011 Load: 42.4 t ADT: 1,550

HILLTOP DRIVE

Good

Over: WOODS CREEK

.2M.N.HUNT.ALGQN.RD., McHenry, IL

Built 1985 Load: 42.8 t ADT: 1,600

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