Mercer County, IL

162 public highway bridges

Mercer County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Mercer County, Illinois contains 162 public highway bridges. Roughly 51.2% are rated “Good,” 42% “Fair,” and 6.8% “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.

162
Total Bridges
51.2%
Good
42%
Fair
6.8%
Poor Condition

Condition Distribution

Good
51.2% (83)
Fair
42% (68)
Poor
6.8% (11)

All Bridges (162)

TR 42

Good

Over: POPE CREEK

N EDGE OF KEITHSBURG, Mercer, IL

Built 1990 Load: 32.4 t ADT: 10

TR 284

Good

Over: BRANCH OF POPE CREEK

NW-36-T14NR1W, Mercer, IL

Built 1981 Load: 32.4 t ADT: 25

TR 268

Good

Over: POPE CR

S.CTR-21-T14NR1W, Mercer, IL

Built 1987 Load: 32.4 t ADT: 100

TR 107

Good

Over: STREAM

N.CTR-2-T14NR1W, Mercer, IL

Built 1988 Load: 32.4 t ADT: 25

TR 240

Good

Over: DONAHUE RUN

NW-7-T14NR1W, Mercer, IL

Built 1991 Load: 32.4 t ADT: 50

TR 260

Good

Over: N. POPE CREEK

CTR-20-T14NR1W, Mercer, IL

Built 1992 Load: 32.4 t ADT: 75

TR 252

Good

Over: DONOHUE RUN

NW COR-8-T14NR1W, Mercer, IL

Built 1996 Load: 32.4 t ADT: 25

TR 266

Good

Over: TRIB TO EDWARDS RIV

WLINE NW1/4 T14NR1W, Mercer, IL

Built 1998 Load: 32.4 t ADT: 25

TR 274

Good

Over: POPE CREEK

E.CTR-21-T14NR1W, Mercer, IL

Built 2006 Load: 32.4 t ADT: 25

TR 183A

Good

Over: STREAM

CTR-28-T14NR2W, Mercer, IL

Built 1992 Load: 32.4 t ADT: 25

TR 198A

Good

Over: EDWARDS RIVER

NW-6-T14NR2W, Mercer, IL

Built 1998 Load: 32.4 t ADT: 25

TR 230

Good

Over: DONAHUE RUN

SE-2-T14NR2W, Mercer, IL

Built 2009 Load: 32.4 t ADT: 25

TR 136B

Good

Over: PIKE RUN CREEK

E.CTR-30-T14NR3W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 175

TR 158

Good

Over: PIKE RUN

W.CTR-28-T14NR3W, Mercer, IL

Built 1992 Load: 32.4 t ADT: 325

TR 132

Good

Over: EDWARDS RIVER

NE-7-T14NR3W, Mercer, IL

Built 2007 Load: 32.4 t ADT: 50

TR 193A

Good

Over: WILDCAT CREEK

CTR-33-T14NR4W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 25

TR 100A

Good

Over: WILDCAT CREEK

SE-28-T14NR4W, Mercer, IL

Built 1991 Load: 32.4 t ADT: 25

TR 52

Good

Over: EDWARDS RIVER

SE-2-T14NR5W, Mercer, IL

Built 1990 Load: 32.4 t ADT: 25

TR 109

Good

Over: ELIZA CREEK

SE-1-T14NR6W, Mercer, IL

Built 1994 Load: 32.4 t ADT: 50

TR 111

Good

Over: WINTERS CREEK

W.CTR-3-T14NR5W, Mercer, IL

Built 1997 Load: 32.4 t ADT: 25

TR 2

Good

Over: CAMP CREEK

SE-12-T15NR1W, Mercer, IL

Built 1980 Load: 32.4 t ADT: 50

TR 262

Good

Over: EDWARDS RIVER

SE-29-T15NR1W, Mercer, IL

Built 2005 Load: 32.4 t ADT: 50

TR 97

Good

Over: TRIB TO EDWARDS RIV

SW1/4-32-T15NR2W, Mercer, IL

Built 2002 Load: 32.4 t ADT: 25

TR 208

Good

Over: CAMP CREEK

SE1/4NE1/4-20-T15NR2, Mercer, IL

Built 2006 Load: 32.4 t ADT: 25

TR 176

Good

Over: CAMP CREEK

SW-23-T15NR3W, Mercer, IL

Built 1980 Load: 32.4 t ADT: 25

TR 40

Good

Over: ELIZA CREEK

NE-22-T15NR5W, Mercer, IL

Built 1988 Load: 32.4 t ADT: 25

TR 58

Good

Over: ELIZA CREEK

W.CTR-23-T15NR5W, Mercer, IL

Built 1982 Load: 32.4 t ADT: 25

TR 59

Good

Over: MAIN DITCH

S.CTR-23-T15NR6W, Mercer, IL

Built 1986 Load: 32.4 t ADT: 75

TR 40

Good

Over: WINTER'S CREEK

SE-34-T15NR5W, Mercer, IL

Built 1991 Load: 32.4 t ADT: 25

TR 3

Good

Over: MAIN DITCH NORTH

SW-1-T15NR6W, Mercer, IL

Built 2001 Load: 32.4 t ADT: 75

TR 8

Good

Over: MAIN DITCH NORTH

SW-24-T15NR6W, Mercer, IL

Built 2007 Load: 32.4 t ADT: 10

TR 228

Good

Over: N. POPE CREEK

Sec 24,T14N,R2W, Mercer, IL

Built 2020 Load: 32.4 t ADT: 25

FAS 214

Good

Over: SNAKE CREEK

SW COR-24-T13NR4W, Mercer, IL

Built 1990 Load: 32.4 t ADT: 50

TR 95

Good

Over: TRIB EDWARDS RIVER

SE-36-T15NR3W, Mercer, IL

Built 1999 Load: 32.7 t ADT: 25

TR 206

Good

Over: NORTH HENDERSON CR

SW-21-T13NR2W, Mercer, IL

Built 1996 Load: 34.7 t ADT: 50

TR 264

Good

Over: CAMP CREEK

E.CTR-20-T15NR1W, Mercer, IL

Built 2019 Load: 35.0 t ADT: 125

TR 205

Good

Over: PIKE RUN

NE-1-T13NR4W, Mercer, IL

Built 1980 Load: 37.6 t ADT: 50

TR 290B

Good

Over: POPE CREEK

N CTR-14-T14NR1W, Mercer, IL

Built 1998 Load: 37.9 t ADT: 25

TR 69

Good

Over: CAMP CREEK

NE-29-T15NR1W, Mercer, IL

Built 1980 Load: 38.6 t ADT: 100

TR 59

Good

Over: DRAINAGE DITCH

SW-24-T15NR6W, Mercer, IL

Built 1995 Load: 38.6 t ADT: 75

TR 97

Good

Over: TRIB EDWARDS RIVER

SE1/4 SEC32 T15NR2W, Mercer, IL

Built 2000 Load: 38.9 t ADT: 25

TR 164

Good

Over: CAMP CREEK

SW-21-T15NR3W, Mercer, IL

Built 1998 Load: 39.9 t ADT: 25

FAS 212 (CH 9)

Good

Over: CAMP CREEK

NW-8-T14NR4W, Mercer, IL

Built 2018 Load: 41.8 t ADT: 300

TR 133

Good

Over: TRIB TO PARKER RUN

SW-2-T14NR1W, Mercer, IL

Built 1998 Load: 42.1 t ADT: 50

TR 206

Good

Over: POPE CREEK

SW-33-T14NR2W, Mercer, IL

Built 1984 Load: 42.1 t ADT: 25

TR 244

Good

Over: POPE CREEK

SW-31-T14NR1W, Mercer, IL

Built 1983 Load: 43.7 t ADT: 25

TR 45

Good

Over: N. CAMP CREEK

NE-23-T15NR3W, Mercer, IL

Built 2020 Load: 47.6 t ADT: 10

TR 124

Good

Over: POPE CREEK

SE-1-T13NR4W, Mercer, IL

Built 1982 Load: 48.0 t ADT: 25

TR 192

Good

Over: MAIDS RUN

SE-12-T13NR3W, Mercer, IL

Built 2021 Load: 56.1 t ADT: 10

TR 33

Good

Over: BURNT BRANCH

NE-16-T15NR5W, Mercer, IL

Built 1984 Load: 63.5 t ADT: 50

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.