Grundy County, IL

269 public highway bridges

Grundy County Bridge Snapshot

Grundy County, Illinois contains 269 public highway bridges in the FHWA National Bridge Inventory. Roughly 38.3% are rated “Good,” 27.1% “Fair,” 24.2% “Poor,” and 24.2% 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.

269

Total Bridges

38.3%

Good

24.2%

Poor

24.2%

Structurally Deficient

Condition Distribution

Good

38.3% (103)

Fair

27.1% (73)

Poor

24.2% (65)

SD

24.2% (65)

All Bridges (269)

Sort:

TR 91A MCARDLE RD

Over: TRIB TO CLAYPOOL D D

.35 MI E GUGTOWN RD, Grundy, IL

Built 1988 Load: 32.4 t ADT: 375

TR 20 JOHNNY RUN R

Over: WAUPECON CREEK

.3 MI S PRAIRIE RD, Grundy, IL

Built 1983 Load: 32.4 t ADT: 75

TR 1E LIV.CO.

Over: JOHNNY RUN

.13 MI W KINSMAN RD, Grundy, IL

Built 1999 Load: 32.4 t ADT: 25

TR 72 VERONA RD

Over: TRIB W FORK MAZON RV

SEC26 T31N R6E 3RD, Grundy, IL

Built 1998 Load: 32.4 t ADT: 275

DWIGHT RD TR-110

Over: WEST FK MAZON RIVER

.09 MI S GARDNER RD, Grundy, IL

Built 1977 Load: 32.4 t ADT: 150

HOWLAND RD/MS 2020

Over: TRIB E FK MAZON RIV

.75 MI E GORMAN ROAD, Grundy, IL

Built 1983 Load: 32.4 t ADT: 50

CREEK DR./MS 1115

Over: E FORK NETTLE CREEK

.03M S OF THOMAS DR., Grundy, IL

Built 2000 Load: 32.4 t ADT: 1,350

MINOOKA RD/FAU400

Over: AUX SABLE CREEK

2.0 MI W OF MINOOKA, Grundy, IL

Built 1993 Load: 33.4 t ADT: 2,900

TR 123 PRAIRIE ROA

Over: WAUPECON CREEK

.27 MI W GONNAM ROAD, Grundy, IL

Built 1982 Load: 33.4 t ADT: 100

TR 130 HIGGINS RD

Over: TRIB TO MAZON RIVER

0.11 MI S ILL 113, Grundy, IL

Built 1987 Load: 33.4 t ADT: 125

TR-74A Verona Road

Over: Murray Sluice

0.53M S. Gardner Rd, Grundy, IL

Built 1989 Load: 33.4 t ADT: 225

TR 159A STONEWALL

Over: E. FORK MAZON RIVER

.38 MI E STORM RD, Grundy, IL

Built 1985 Load: 33.7 t ADT: 50

FAS 1273/DuPont Rd

Over: ARMSTRONG RUN

0.27 MI E CO LINE, Grundy, IL

Built 2006 Load: 34.0 t ADT: 250

TR-128 TYNAN RD

Over: MURRAY SLUICE

.06 MI N GR RIDGE RD, Grundy, IL

Built 1981 Load: 34.0 t ADT: 75

GONNAM RD TR-32

Over: WAUPECON CR

.14 MI N PRAIRIE RD, Grundy, IL

Built 1980 Load: 35.0 t ADT: 150

GRINTER RD TR-129

Over: BREWSTER RUN

.26 MI E OLD MAZ RD, Grundy, IL

Built 1979 Load: 35.0 t ADT: 50

VERONA RD TR-74A

Over: JOHNNY RUN

.16 MI S BURKHART RD, Grundy, IL

Built 1977 Load: 35.0 t ADT: 225

US 6

Over: DRAINAGE DITCH

2.5 MI E OF ILL 170, Grundy, IL

Built 1980 Load: 35.3 t ADT: 3,200

TR 25A CEMETERY RD

Over: I&M CANAL

W. OF MCLINDON RD, Grundy, IL

Built 1984 Load: 35.6 t ADT: 400

FAS-288 (CH-18)

Over: Claypool Drain Ditch

0.5 Mi N Coal City, Grundy, IL

Built 2013 Load: 36.0 t ADT: 1,400

BENNETT RD TR-22

Over: HOG RUN

0.18 MI N. FARMER RD, Grundy, IL

Built 1990 Load: 36.0 t ADT: 50

TR-13 HOGE RD

Over: WEST FORK NETTLE CR

.65 MI NW TR 70, Grundy, IL

Built 1981 Load: 36.3 t ADT: 25

FAS-292 Gardner Rd

Over: Murray Sluice

.28 MI W WARD TR84, Grundy, IL

Built 2002 Load: 36.9 t ADT: 850

TR 56

Over: THUNDER CREEK

300' S PRAIRIE RD, Grundy, IL

Built 2008 Load: 36.9 t ADT: 25

CH 32 GARDNER RD

Over: TRIB TO WAPECON CR

.01 MI E LASALLE RD, Grundy, IL

Built 1988 Load: 37.3 t ADT: 900

ILL 53 FAP 846

Over: MAZON RIVER

1.3 M N OF GARDNER, Grundy, IL

Built 1969 Load: 37.6 t ADT: 1,400

GORMAN RD CH 10

Over: MAZON RIVER

0.04 MI N TR 109B, Grundy, IL

Built 1987 Load: 37.9 t ADT: 300

IL 47 FAP 326

Over: IL RIV.& I & M CANAL

APPR.1.23MI S /US 6, Grundy, IL

Built 2003 Load: 38.9 t ADT: 18,100

TR 74

Over: TRIB.OF WAUPECON CRK

W4000, S1400, Grundy, IL

Built 1998 Load: 38.9 t ADT: 325

FAI 80 EBL

Over: W FORK NETTLE CR

2.52 MI W OF IL 47, Grundy, IL

Built 1958 Load: 40.2 t ADT: 15,300

FAI 80 WBL

Over: W FORK NETTLE CR

2.52 MI W OF IL 47, Grundy, IL

Built 1958 Load: 40.2 t ADT: 15,300

TR-167 SCULLY RD

Over: TRIB E FK MAZON RIV

.09 MI W CH-31, Grundy, IL

Built 2005 Load: 40.2 t ADT: 50

ILL 47

Over: MURRAY CREEK

7.23 MILES N OF I-55, Grundy, IL

Built 1994 Load: 40.5 t ADT: 4,550

MINOOKA RD TR 3

Over: TRIB W FR NETTLE CR

0.57MI E. ROODS RD, Grundy, IL

Built 1991 Load: 40.8 t ADT: 175

FAI 080 (EB & WB)

Over: AUX SABLE CRK

7.73 MI E OF ILL 47, Grundy, IL

Built 2003 Load: 41.1 t ADT: 39,100

FAI 80 WBL

Over: E FORK NETTLE CR

1.3 MI W OF ILL 47, Grundy, IL

Built 1958 Load: 42.1 t ADT: 15,300

T.R. 103 /OMalley

Over: HOG RUN

0.1 mi. E.Kingman Rd, Grundy, IL

Built 2016 Load: 42.4 t ADT: 175

TR-105 (Spring Rd)

Over: MAZON RIVER

.3 MI E CAMPBELL RD, Grundy, IL

Built 1910 Load: 42.8 t ADT: 100

REED ROAD TR-107B

Over: MAZON RIVER

.33 MI W GORMAN RD, Grundy, IL

Built 1981 Load: 43.4 t ADT: 275

ILL 47

Over: BREWSTER RUN

N OF I-55, Grundy, IL

Built 2004 Load: 44.7 t ADT: 3,600

IL 47 FAP 326

Over: W FORK MAZON RIVER

6.1 MI N OF I-55, Grundy, IL

Built 2009 Load: 46.0 t ADT: 4,550

I-80EB Entrance Ra

Over: COLLINS RUN

SE QUAD I-80/BRISBIN, Grundy, IL

Built 2011 Load: 47.3 t ADT: 1,050

NETTLE CR ROAD CH-

Over: WEST FORK NETTLE CR

0.1 MI N OF TR 13, Grundy, IL

Built 1964 Load: 48.0 t ADT: 100

ILL 113

Over: MAZON RIVER

3.12 M E. OF ILL 47, Grundy, IL

Built 2000 Load: 49.6 t ADT: 4,450

IL 47 FAP 326

Over: JOHNNY RUN

S EDGE OF MAZON, Grundy, IL

Built 2009 Load: 50.5 t ADT: 4,550

FAI 55 NB

Over: Union Pacific RR

3.2 MI S OF REED RD, Grundy, IL

Built 1955 Load: 52.2 t ADT: 12,050

FAI 55 SB

Over: Union Pacific RR

3.2 MI S OF REED RD, Grundy, IL

Built 1955 Load: 52.2 t ADT: 12,050

MARSEILLES RD,CH 2

Over: LONG POINT CREEK

0.37 MI W OF US 6, Grundy, IL

Built 2004 Load: 52.2 t ADT: 2,050

ILL 113/FAS 301

Over: BR OF MAZON RIVER

2.75 M. E. OF IL 47, Grundy, IL

Built 2003 Load: 53.5 t ADT: 4,450

PINE BLUFF RD CH-2

Over: MAZON RIVER

0.12 MI W OF TR 45, Grundy, IL

Built 2010 Load: 58.6 t ADT: 4,600

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 6, 2026