Monroe County, IL

130 public highway bridges

Monroe County Bridge Snapshot

Monroe County, Illinois contains 130 public highway bridges in the FHWA National Bridge Inventory. Roughly 57.7% are rated “Good,” 30% “Fair,” 6.9% “Poor,” and 6.9% 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.

130

Total Bridges

57.7%

Good

6.9%

Poor

6.9%

Structurally Deficient

Condition Distribution

Good

57.7% (75)

Fair

30% (39)

Poor

6.9% (9)

SD

6.9% (9)

All Bridges (130)

Sort:

Levee Road / MS 56

Over: FAI 255

1 mi E OF J.B.BRIDGE, Monroe, IL

Built 1984 ADT: 51,700

IL3NB-255WB Ramp A

Over: I 255 NB - Ramp D

NORTH OF COLUMBIA, Monroe, IL

Built 1982 ADT: 51,700

I 255 NB Ramp D

Over: 255 SB->IL3 SB Rmp B

NORTH OF COLUMBIA, Monroe, IL

Built 1982 ADT: 35,500

IL3NB->255WB Rmp E

Over: 255SB->IL3SB Ramp B

NORTH OF COLUMBIA, Monroe, IL

Built 1982 ADT: 35,500

ILL 3 NB

Over: Palmer Rd/Palmer Crk

0.8 mi S of I-255, Monroe, IL

Built 1984 ADT: 6,950

IL 3 SB

Over: Palmer Rd/Palmer Crk

0.8 mi S of I-255, Monroe, IL

Built 1991 ADT: 4,800

IL 158

Over: IL 3

1 MI S COLUMBIA, Monroe, IL

Built 2012 ADT: 22,800

MAEYSTOWN RD

Over: MAEYSTOWN CREEK

MAEYSTOWN, Monroe, IL

Built 1881 Load: 17.5 t ADT: 375

TR 114/ LRC RD.

Over: FOUNTAIN CK

SEC10 RD DIST 7, Monroe, IL

Built 1935 Load: 24.3 t ADT: 100

BRICKEY RD TR 119

Over: BLACK CREEK

ROAD DIST #1, Monroe, IL

Built 1910 Load: 24.3 t ADT: 150

L ROAD TR 136

Over: ROCKEY BROOK

RD DIST 1 SEC 19, Monroe, IL

Built 1962 Load: 24.3 t ADT: 75

GOEDDELTOWN RO TR

Over: PRAIRIE CK

RD.DIST NO.2, Monroe, IL

Built 1983 Load: 24.3 t ADT: 75

ILL 159

Over: BLACK CREEK

1.4 M N RED BUD, Monroe, IL

Built 1928 Load: 29.5 t ADT: 4,600

FAI 255 NB/EB

Over: UPRR

2 mi E of JB Bridge, Monroe, IL

Built 1984 Load: 30.8 t ADT: 25,850

FAI 255 SB/WB

Over: UPRR

2 mi E of JB Bridge, Monroe, IL

Built 1981 Load: 32.1 t ADT: 12,500

CH 12

Over: DENNIS HOLLOW CREEK

1 ME VALMEYER SEC 2, Monroe, IL

Built 1982 Load: 32.4 t ADT: 775

FAS 1857

Over: MAEYSTOWN CREEK

1.5 M SW O MAEYSTOWN, Monroe, IL

Built 1980 Load: 32.4 t ADT: 325

HH ROAD TR 47

Over: FOUNTAIN CREEK

5 M NW OF WATERLO 6, Monroe, IL

Built 1981 Load: 32.4 t ADT: 475

GALL RD FAU 9345

Over: TRIBUTARY TO CARR CK

COLUMBIA, Monroe, IL

Built 1982 Load: 32.4 t ADT: 1,550

TR 145 S. FORK RD

Over: HORSE CR

SEC 12 RD DIST 4, Monroe, IL

Built 1984 Load: 32.4 t ADT: 75

MARTINI RDTR59

Over: KOPP CREEK

SECTION 21RD DIS 2, Monroe, IL

Built 1985 Load: 32.4 t ADT: 200

TR 96 "M" ROAD

Over: RICHLAND CREEK

SEC 15 RD.DIST. 1, Monroe, IL

Built 1987 Load: 32.4 t ADT: 175

TR133 BRANDT RD

Over: MAEYSTOWN CR

SEC 6 ROAD DIST 8, Monroe, IL

Built 1986 Load: 32.4 t ADT: 175

FAS 1857

Over: ONE MILE RACE CREEK

4M SE. FULTS ON CH3, Monroe, IL

Built 1988 Load: 32.4 t ADT: 250

TR 145 S. FORK RD

Over: SOUTH FORK

SEC 15 RD DIST 4, Monroe, IL

Built 1988 Load: 32.4 t ADT: 75

TR 21 STEPPIG RD.

Over: LITTLE CARR CK.

3 MI SW COLUMBIA #5, Monroe, IL

Built 1988 Load: 32.4 t ADT: 125

TR 170

Over: DRY FORK CR.

1.5 MI. E. RENAULT, Monroe, IL

Built 1990 Load: 32.4 t ADT: 50

TR 141 FULTS RD

Over: FULTS CREEK

SEC 22 RD DIST 8, Monroe, IL

Built 1992 Load: 32.4 t ADT: 75

GILMORE LK RD/ TR

Over: TRIB GERHARDT CREEK

ROAD DISTRICT 2, Monroe, IL

Built 1992 Load: 32.4 t ADT: 250

TR 7

Over: CARR CREEK

ROAD DIST 5, Monroe, IL

Built 1992 Load: 32.4 t ADT: 75

TR 56B / D ROAD

Over: FOUNTAIN CREEK

RD DIST #6, Monroe, IL

Built 1995 Load: 32.4 t ADT: 200

FAS 1857

Over: LAKE MILDRED OUTLET

5.5 MI. SE FULTS CH3, Monroe, IL

Built 1996 Load: 32.4 t ADT: 250

GALL RD./ FAU 9345

Over: TRIB CARR CK

COLUMBIA, Monroe, IL

Built 1992 Load: 32.4 t ADT: 1,550

FAS 1857

Over: TRIB. TO MOREDOCK LK

VALMEYER, Monroe, IL

Built 1998 Load: 32.4 t ADT: 650

MS 5900A RAMSEY RD

Over: PALMER CR

1.5 WEST OF COL, Monroe, IL

Built 1986 Load: 32.4 t ADT: 350

CH 5/FAS 857

Over: HORSE CREEK

2.5 N AMESCH 5, Monroe, IL

Built 1987 Load: 34.7 t ADT: 850

ILL 159

Over: PRAIRIE DU LONG CRK

3 M S HECKER, Monroe, IL

Built 1928 Load: 36.0 t ADT: 4,500

ILL 156

Over: BOND CREEK

0.9MI E VALMEYER, Monroe, IL

Built 1990 Load: 36.0 t ADT: 1,650

FAI 255 EB

Over: MISSISSIPPI RIVER

3.0MI W OF COLUMBIA, Monroe, IL

Built 1986 Load: 37.6 t ADT: 25,850

FAI 255WB

Over: MISSISSIPPI RIVER

N.W.OF COLUMBIA, Monroe, IL

Built 1984 Load: 37.6 t ADT: 25,850

IL 156

Over: FOUNTAIN CREEK

3.7 M E VALMEYER, Monroe, IL

Built 1927 Load: 38.9 t ADT: 3,350

TR 72

Over: ANDY'S RUN

ROAD DIST 6, Monroe, IL

Built 1950 Load: 39.5 t ADT: 400

FAS 1857

Over: TRIB TO DRNG DITCH

3.6M SE FULTS ON CH3, Monroe, IL

Built 1955 Load: 40.2 t ADT: 200

IL 156

Over: PRAIRIE DULONG CR

2 MI W OF HECKER, Monroe, IL

Built 1994 Load: 47.0 t ADT: 2,050

Ramp to IL 3 SB

Over: PALMER CREEK

0.8 mi S of I-255, Monroe, IL

Built 1991 Load: 52.2 t ADT: 1,350

J ROAD/ TR 102

Over: TRIB TO ROCKHOUSE CR

RD DIST NO3, Monroe, IL

Built 1985 Load: 89.1 t ADT: 150

LEVEE RD./ TR 28

Over: FISH LAKE DR DITCH

RD DISTRICT 5, Monroe, IL

Built 1957 Load: 24.3 t ADT: 75

FAS 1857/CH6

Over: LONG SLASHCREEK

3.0M W COLUMBIA/CH6, Monroe, IL

Built 1982 Load: 31.8 t ADT: 3,600

FAS 854 CH 8

Over: GULF MOBILE & OHIO R

CH 8 OVER GM&O RR, Monroe, IL

Built 1970 Load: 32.1 t ADT: 2,350

CH 12

Over: DUCK CREEK

0.3M E VALMEYERSEC10, Monroe, IL

Built 1982 Load: 32.4 t ADT: 775

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 5, 2026