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)

Sort:

TR 110

Over: LITTLE CAMP CR

NW-35-T15NR4W, Mercer, IL

Built 1900 Load: 9.7 t ADT: 25

TR 284

Over: N.HENDERSON CREEK

NW-13-T13NR1W, Mercer, IL

Built 1960 Load: 14.6 t ADT: 25

TR 250

Over: HENDERSON CREEK

W.CTR-17-T13NR1W, Mercer, IL

Built 1957 Load: 16.8 t ADT: 10

TR 204

Over: CAMP CREEK

NE-19-T15NR2W, Mercer, IL

Built 1900 Load: 17.5 t ADT: 25

FAS 206-CH 4

Over: CAMP CREEK

SW-12-T15NR1W, Mercer, IL

Built 1958 Load: 21.1 t ADT: 1,100

FAS 212-CH 9

Over: EDWARDS RIVER

SW.COR-8-T14NR4W, Mercer, IL

Built 1955 Load: 22.0 t ADT: 300

TR 278

Over: CAMP CREEK

SE-16-T15NR1W, Mercer, IL

Built 1900 Load: 22.0 t ADT: 375

TR 22

Over: WINTERS CREEK

SW-3-T14NR5W, Mercer, IL

Built 1965 Load: 22.7 t ADT: 25

FAS 1405-CH 12

Over: NORTH HENDERSON CR

W.CTR-14-T13NR1W, Mercer, IL

Built 1956 Load: 23.7 t ADT: 50

FAS 206-CH 4

Over: EDWARDS RIVER

S.CTR-24-T15NR1W, Mercer, IL

Built 1947 Load: 23.7 t ADT: 950

FAS 214-CH 13

Over: DOUGLAS CREEK

SE-2-T13NR4W, Mercer, IL

Built 1942 Load: 24.3 t ADT: 100

FAS 214-CH 13

Over: LITTLE CAMP CREEK

E.CTR-34-T15NR4W, Mercer, IL

Built 1948 Load: 24.3 t ADT: 75

TR 196

Over: GOOSE RUN

NW-19-T13NR2W, Mercer, IL

Built 1975 Load: 24.3 t ADT: 25

TR 284

Over: N. POPE CREEK

NW-24-T14NR1W, Mercer, IL

Built 1963 Load: 24.3 t ADT: 75

TR 183A

Over: POPE CREEK

CTR-26-T14NR2W, Mercer, IL

Built 1964 Load: 24.9 t ADT: 75

TR 247

Over: MAIDS RUN CREEK

NE-23-T13NR3W, Mercer, IL

Built 1972 Load: 25.3 t ADT: 25

TR 162

Over: MAIDS RUN

CTR-22-T13NR3W, Mercer, IL

Built 1978 Load: 25.3 t ADT: 50

TR 253

Over: SNAKE CREEK

CTR-25-T13NR4W, Mercer, IL

Built 1958 Load: 26.9 t ADT: 25

FAS 214-CH 13

Over: EDWARDS RIVER

W.CTR-11-T14NR4W, Mercer, IL

Built 1968 Load: 27.2 t ADT: 250

TR 136A

Over: N HENDERSON CR

SW-20-T13NR3W, Mercer, IL

Built 1974 Load: 27.9 t ADT: 25

TR 258

Over: N. HENDERSON CREEK

W.CTR-16-T13NR1W, Mercer, IL

Built 1969 Load: 28.2 t ADT: 25

TR 109

Over: ELIZA LAKE DITCH

SW-2-T14NR6W, Mercer, IL

Built 1986 Load: 28.2 t ADT: 50

FAS 206-CH 4

Over: PARKER RUN

SE-36-T15NR1W, Mercer, IL

Built 1976 Load: 28.8 t ADT: 950

TR 202

Over: DUGOUT RUN

NW-29-T14NR2W, Mercer, IL

Built 1964 Load: 29.2 t ADT: 25

FAS 1405-CH 12

Over: POPE CREEK

SW-35-T14NR1W, Mercer, IL

Built 1971 Load: 29.5 t ADT: 50

FAS 1405-CH 12

Over: NORTH POPE CREEK

NW-23-T14NR1W, Mercer, IL

Built 1971 Load: 31.8 t ADT: 100

TR 282

Over: CAMP CREEK

SE-10-T15NR1W, Mercer, IL

Built 1977 Load: 31.8 t ADT: 200

TR 190

Over: CAMP CREEK

SE-23-T15NR3W, Mercer, IL

Built 1980 Load: 31.8 t ADT: 25

TR 226

Over: TOMS CREEK

SE-35-T13NR2W, Mercer, IL

Built 1979 Load: 32.1 t ADT: 50

ILL 94

Over: POPE CREEK

3.9 MI S OF ILL 17, Mercer, IL

Built 1924 Load: 32.4 t ADT: 1,900

FAS 1216-CH 3

Over: NORTH HENDERSON CR

SW-20-T13NR2W, Mercer, IL

Built 1972 Load: 32.4 t ADT: 25

TR 259

Over: TOMS CREEK

NW-31-T13NR1W, Mercer, IL

Built 1988 Load: 32.4 t ADT: 50

TR 1

Over: DUCK CREEK

SE-32-T13NR3W, Mercer, IL

Built 1984 Load: 32.4 t ADT: 20

TR 212

Over: POPE CREEK

E.CTR-33-T14NR2W, Mercer, IL

Built 1988 Load: 32.4 t ADT: 25

TR 128

Over: EDWARDS RIVER

W.CTR-7-T14NR3W, Mercer, IL

Built 1986 Load: 32.4 t ADT: 175

TR 165

Over: STURGEON BAY

NW-19-T14NR5W, Mercer, IL

Built 1980 Load: 32.4 t ADT: 50

TR 198

Over: CAMP CREEK

SW-19-T15NR2W, Mercer, IL

Built 1975 Load: 32.4 t ADT: 50

TR 114

Over: CAMP CREEK

SE-23-T15NR4W, Mercer, IL

Built 1981 Load: 32.4 t ADT: 75

TR 77

Over: CAMP CREEK

E.CTR-27-T15NR4W, Mercer, IL

Built 1986 Load: 32.4 t ADT: 25

TR 20

Over: KEATING CREEK

SW-8-T15NR5W, Mercer, IL

Built 1983 Load: 32.4 t ADT: 25

TR 105

Over: PARKER RUN

SW-27-T15NR1W, Mercer, IL

Built 1975 Load: 33.0 t ADT: 75

FAS 209-CH 14

Over: ELIZA CREEK

SE-30-T15NR5W, Mercer, IL

Built 1966 Load: 33.4 t ADT: 1,300

TR 138B

Over: CAMP CREEK

SE-19-T15NR3W, Mercer, IL

Built 1980 Load: 34.7 t ADT: 25

TR 146

Over: CAMP CREEK

SW-20-T15NR3W, Mercer, IL

Built 1980 Load: 34.7 t ADT: 25

TR 53

Over: CAMP CREEK

NW-21-T15NR1W, Mercer, IL

Built 1969 Load: 35.0 t ADT: 275

TR 215

Over: WILDCAT CR

NW-9-T13NR4W, Mercer, IL

Built 1971 Load: 35.3 t ADT: 10

TR 111

Over: CAMP CREEK

NW-8-T14NR4W, Mercer, IL

Built 1981 Load: 35.3 t ADT: 25

Ill 17

Over: Edwards River

5 mi W of Joy, Mercer, IL

Built 2019 Load: 35.6 t ADT: 1,500

TR 198

Over: N. CAMP CREEK

SW-18-T15NR2W, Mercer, IL

Built 1983 Load: 35.6 t ADT: 50

ILL 94

Over: CAMP CREEK

5 MI N OF ALEDO, Mercer, IL

Built 1960 Load: 36.9 t ADT: 2,900

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

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Compiled by PlainBridges, Independent data publisher

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.