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)

ILL 94

Fair

Over: DUCK CREEK

4 MI N OF LITTLEYORK, Mercer, IL

Built 1989 Load: 36.9 t ADT: 1,250

4TH ST

Fair

Over: POPE CREEK

IN KEITHSBURG, Mercer, IL

Built 1989 Load: 36.9 t ADT: 800

FAS 1210-CH 10

Fair

Over: EDWARDS RIVER

NE-9-T14NR5W, Mercer, IL

Built 1980 Load: 37.6 t ADT: 100

TR 208

Fair

Over: EDWARDS RIVER

SE-32-T15NR2W, Mercer, IL

Built 1997 Load: 38.6 t ADT: 75

US 67

Fair

Over: TOMS CREEK

025 MI N ALEXIS WYE, Mercer, IL

Built 1999 Load: 38.9 t ADT: 2,400

ILL 94

Fair

Over: N. HENDERSON CR

2.4 MI N OF ILL 135, Mercer, IL

Built 1924 Load: 40.5 t ADT: 1,250

FAS 212-CH 9

Fair

Over: ELIZA CREEK

NW-17-T15NR4W, Mercer, IL

Built 1973 Load: 40.5 t ADT: 150

US 67

Fair

Over: EDWARDS RIVER

2 MI N OF VIOLA, Mercer, IL

Built 1998 Load: 40.8 t ADT: 5,300

FAS 211-CH 8

Fair

Over: ELIZA CREEK

SE-21-T15NR5W, Mercer, IL

Built 1961 Load: 41.8 t ADT: 100

TR 244

Fair

Over: HENDERSON CREEK

CTR-18-T13NR1W, Mercer, IL

Built 1965 Load: 41.8 t ADT: 25

TR 284

Fair

Over: POPE CREEK

NW-1-T13NR1W, Mercer, IL

Built 1981 Load: 43.7 t ADT: 25

TR 47

Fair

Over: CAMP CREEK

SE-16-T15N,R2W, Mercer, IL

Built 1983 Load: 44.4 t ADT: 25

TR129

Fair

Over: DONOHUE RUN

CTR-3-T14NR2W, Mercer, IL

Built 1974 Load: 45.0 t ADT: 100

FAS 214-CH 13

Fair

Over: CAMP CREEK

SW-34-T15NR4W, Mercer, IL

Built 1973 Load: 46.0 t ADT: 75

US 67

Fair

Over: DONAHUE CREEK

1.6 MI N OF IL 17, Mercer, IL

Built 1997 Load: 51.5 t ADT: 5,300

TR 223

Fair

Over: DOUGLAS CREEK

NE-11-T13NR4W, Mercer, IL

Built 1997 Load: 51.8 t ADT: 10

ILL 94

Fair

Over: EDWARDS RIVER

1.9 MI N OF ILL 17, Mercer, IL

Built 1960 Load: 52.2 t ADT: 3,450

TR 191

Fair

Over: MAD RUN CREEK

E.CTR-35-T14NR5W, Mercer, IL

Built 1985 Load: 56.4 t ADT: 25

TR 165

Good

Over: ELIZA LAKE DITCH

2 Mi N of New Boston, Mercer, IL

Built 2015 Load: 19.4 t ADT: 50

FAS 1216-CH 3

Good

Over: POPE CREEK

NW-31-T14NR2W, Mercer, IL

Built 1962 Load: 24.0 t ADT: 25

FAS 1216-CH 3

Good

Over: MAIDS RUN

NE-7-T13NR2W, Mercer, IL

Built 1968 Load: 24.3 t ADT: 10

TR 244

Good

Over: N. POPE CREEK

SW-19-T14NR1W, Mercer, IL

Built 1972 Load: 24.3 t ADT: 50

TR 188

Good

Over: POPE CREEK

SE-35-T14NR3W, Mercer, IL

Built 1980 Load: 26.6 t ADT: 50

TR 186A

Good

Over: DUCK CREEK

SE-26-T13NR3W, Mercer, IL

Built 1958 Load: 29.2 t ADT: 10

TR 116

Good

Over: DOUGLAS CREEK

S.CTR-25-T14NR4W, Mercer, IL

Built 2003 Load: 29.8 t ADT: 125

TR 50

Good

Over: POPE CREEK

NW-13-T13NR5W, Mercer, IL

Built 1980 Load: 32.1 t ADT: 75

FAS 1405 CH 12

Good

Over: N. HENDERSON BRANCH

SW-14-T13NR1W, Mercer, IL

Built 2016 Load: 32.4 t ADT: 50

FAS 217 (CH 6)

Good

Over: Maids Run

NE-14-T13NR3W, Mercer, IL

Built 2012 Load: 32.4 t ADT: 75

FAS 214-CH 13

Good

Over: POPE CREEK

W.CTR-12-T13NR4W, Mercer, IL

Built 2008 Load: 32.4 t ADT: 200

FAS 1210

Good

Over: STREAM

NE SEC 4 T14N R5W, Mercer, IL

Built 1994 Load: 32.4 t ADT: 100

FAS 209-CH 14

Good

Over: ELIZA CREEK N.

CTR-7-T15NR5W, Mercer, IL

Built 1978 Load: 32.4 t ADT: 1,450

FAS 209(CH 14)

Good

Over: UNNAMED STREAM

1.14 S ROCK ISLANDCO, Mercer, IL

Built 2004 Load: 32.4 t ADT: 1,450

FAS 209-CH 14

Good

Over: KEATING DITCH

SE-7-T15NR5W, Mercer, IL

Built 2008 Load: 32.4 t ADT: 1,450

FAS 215-CH 16

Good

Over: SNAKE CREEK

SE-23-T13NR4W, Mercer, IL

Built 2020 Load: 32.4 t ADT: 300

TR 274

Good

Over: HENDERSON CREEK

E.CTR-16-T13NR1W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 25

TR 196

Good

Over: DUCK CREEK

NW-31-T13NR2W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 25

TR 207

Good

Over: POPE CREEK

NE-2-T13NR2W, Mercer, IL

Built 1988 Load: 32.4 t ADT: 25

TR 196

Good

Over: N. HENDERSON CREEK

SW-19-T13NR2W, Mercer, IL

Built 1986 Load: 32.4 t ADT: 25

TR 210

Good

Over: N. HENDERSON CREEK

SW-22-T13NR2W, Mercer, IL

Built 1992 Load: 32.4 t ADT: 25

TR228

Good

Over: POPE CREEK

NW-1-T-13N RW, Mercer, IL

Built 2015 Load: 32.4 t ADT: 10

TR 120

Good

Over: HENDERSON CREEK

SW-30-T13NR3W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 25

TR 162

Good

Over: POPE CREEK

N.CTR-3-T13NR3W, Mercer, IL

Built 1987 Load: 32.4 t ADT: 25

TR 225

Good

Over: POPE CREEK

W.CTR-4-T13NR3W, Mercer, IL

Built 1991 Load: 32.4 t ADT: 35

TR 225

Good

Over: BR. OF POPE CREEK

W-4-T13NR3W, Mercer, IL

Built 1991 Load: 32.4 t ADT: 35

TR 253

Good

Over: HENDERSON CREEK

CTR-30-T13NR3W, Mercer, IL

Built 1994 Load: 32.4 t ADT: 50

TR 162

Good

Over: DUCK CREEK

NW-35-T13NR3W, Mercer, IL

Built 1997 Load: 32.4 t ADT: 25

TR 162

Good

Over: HENDERSON CREEK

NW-26-T31NR3W, Mercer, IL

Built 2016 Load: 32.4 t ADT: 50

TR 44

Good

Over: POPE CREEK

CTR,NW-8-T13NR4W, Mercer, IL

Built 1977 Load: 32.4 t ADT: 100

TR 213

Good

Over: STREAM

NW-7-T13NR4W, Mercer, IL

Built 1985 Load: 32.4 t ADT: 25

TR 100

Good

Over: WILDCAT CREEK

NW-3-T13NR4W, Mercer, IL

Built 1999 Load: 32.4 t ADT: 10

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

Related

Browse all → | Rankings →
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.