Mercer County, OH

329 public highway bridges

Mercer County Bridge Snapshot

Mercer County, Ohio contains 329 public highway bridges in the FHWA National Bridge Inventory. Roughly 41.3% are rated “Good,” 55.9% “Fair,” 2.7% “Poor,” and 2.7% 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 OH 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.

329

Total Bridges

41.3%

Good

2.7%

Poor

2.7%

Structurally Deficient

Condition Distribution

Good

41.3% (136)

Fair

55.9% (184)

Poor

2.7% (9)

SD

2.7% (9)

All Bridges (329)

Sort:

JEFFERSON ST

Over: BRANCH OF WABASH RIVER

0.3 MI NORTH OF MAIN ST, Mercer, OH

Built 1931 Load: 6.2 t ADT: 1,000

USR-127

Over: ST.MARYS RIVER OVERFLOW

.54MI.N.OF JCT. SR-707, Mercer, OH

Built 1966 Load: 22.7 t ADT: 6,143

OLD TOWN RUN ROAD

Over: TOWN RUN

.2 MI. E. FRYSINGER ROAD, Mercer, OH

Built 1997 Load: 22.7 t ADT: 324

SR-118

Over: BRANCH COLDWATER CREEK

1.62MI. S. OF JCT. SR-219, Mercer, OH

Built 1937 Load: 25.9 t ADT: 4,570

SR-118

Over: ST. MARY'S RIVER

.04MI N OF JCT USR-33, Mercer, OH

Built 1938 Load: 25.9 t ADT: 2,581

SR-716

Over: MILE CREEK

.15MI.N.OF DARKE CO.LINE, Mercer, OH

Built 1962 Load: 25.9 t ADT: 1,427

HILL ROAD

Over: BIG BLACK CREEK

0.1 MI. NORTH LEE ROAD, Mercer, OH

Built 2001 Load: 25.9 t ADT: 324

WILSON ROAD

Over: DUCK CREEK

0.1 MI W ST RT 49, Mercer, OH

Built 1983 Load: 25.9 t ADT: 60

FRYSINGER ROAD

Over: ST MARY'S RIVER OVERFLOW

0.6 MI N US RT 33, Mercer, OH

Built 1983 Load: 25.9 t ADT: 151

PHILOTHEA ROAD

Over: BR OF WABASH RIVER

W OF SR49 1.34 MI, Mercer, OH

Built 1994 Load: 25.9 t ADT: 351

STATE LINE RD

Over: LIMBERLOST CREEK

.4 MI SOUTH OF CR 300N, Mercer, OH

Built 1980 Load: 27.2 t ADT: 138

SR-219

Over: BEAVER CREEK

.21MI.E.OF JCT. SR-703, Mercer, OH

Built 1982 Load: 28.8 t ADT: 2,766

SR29

Over: LITTLE BEAVER CREEK

1.24 MI. W. OF JCT. SR118, Mercer, OH

Built 1962 Load: 29.2 t ADT: 2,796

SR-118

Over: WABASH RIVER

2.01MI.N.OF DARKE CO.LINE, Mercer, OH

Built 1961 Load: 29.2 t ADT: 1,991

LEE ROAD

Over: BIG BLACKCREEK

0.2 MI. W. JORDAN RD, Mercer, OH

Built 2001 Load: 29.2 t ADT: 324

ST. PETER ROAD

Over: TOTI CREEK

0.3 MI. S. S.R. 29, Mercer, OH

Built 2002 Load: 29.2 t ADT: 179

LAK SHORE DR MR107

Over: HOT WATER HOLE

0.3 MI E OF SR 127, Mercer, OH

Built 1990 Load: 30.8 t ADT: 5,201

SR29

Over: WABASH RIVER

2.25 MI. E. OF JCT. SR49, Mercer, OH

Built 1982 Load: 32.4 t ADT: 2,796

SR29

Over: BIG BEAVER CREEK

.37 MI. W. OF JCT. SR118, Mercer, OH

Built 1936 Load: 32.4 t ADT: 2,796

USR 33

Over: DENNISON RUN

JCT. SR-707, Mercer, OH

Built 1952 Load: 32.4 t ADT: 3,599

USR 33

Over: TWELVE MILE CREEK

2.11MI.E.OF USR-127, Mercer, OH

Built 1962 Load: 32.4 t ADT: 6,433

SIEGRIST-JUTTE C80

Over: COLDWATER CREEK

0.5 MI E OF T101A, Mercer, OH

Built 2008 Load: 32.4 t ADT: 1,194

MER-VW CO LN RD

Over: DUCKCREEK

0.1 MI W DUDGEON RD, Mercer, OH

Built 1983 Load: 32.4 t ADT: 80

SIEGRIST JUTTE RD

Over: COLDWATER CREEK

.3 MI. EAST S.R. 118, Mercer, OH

Built 1995 Load: 32.4 t ADT: 292

STETLER ROAD

Over: DUCKCREEK DITCH

0.4 MI S ROCKFORD WEST RD, Mercer, OH

Built 1987 Load: 32.4 t ADT: 324

STETLER RD

Over: DUCKCREEK DITCH

0.3 MI. N. ROCKFORD WEST, Mercer, OH

Built 2002 Load: 32.4 t ADT: 324

ROCKFORD WEST RD

Over: BRANCH DUCKCREEK

.6 MI EAST S.R. 49, Mercer, OH

Built 1996 Load: 32.4 t ADT: 272

ST ANTHONY

Over: LITTLE BEAVER CREEK

.1 MI E OF KARCH ROAD, Mercer, OH

Built 2009 Load: 32.4 t ADT: 341

JORDAN ROAD

Over: LITTLE BLACKCREEK DITCH

0.1 MI S LEE ROAD, Mercer, OH

Built 1991 Load: 32.4 t ADT: 81

ERASTUS-DURBIN RD

Over: LITTLE BLACK CREEK

0.4 MI N ST RT 707, Mercer, OH

Built 1980 Load: 32.4 t ADT: 242

ERASTUS-DURBIN RD

Over: LITTLE BLACK CREEK

0.5 MI N ST RT 707, Mercer, OH

Built 1980 Load: 32.4 t ADT: 242

ERASTUS-DURBIN RD

Over: BRANCH BIG BLACK CREEK

0.3 MI NORTH LEE ROAD, Mercer, OH

Built 2000 Load: 32.4 t ADT: 324

STOVER ROAD

Over: DUDGEON DITCH

0.6 MI N WILSON RD, Mercer, OH

Built 1991 Load: 32.4 t ADT: 324

TOWNSHIP-LINE ROAD

Over: LITTLE BLACKCREEK DITCH

0.9 MI SOUTH OF SR 707, Mercer, OH

Built 1990 Load: 32.4 t ADT: 143

TOWNSHIP-LINE ROAD

Over: LITTLE BLACKCREEK DITCH

0.2 MI SOUTH OF SR 707, Mercer, OH

Built 1990 Load: 32.4 t ADT: 143

TOWNSHIP LINE

Over: SANIFT DITCH

0.3 MI S. ROCKFORD WEST, Mercer, OH

Built 2000 Load: 32.4 t ADT: 234

PURDY ROAD

Over: BIG BLACK CREEK

0.1 MI W BURRVILLE ROAD, Mercer, OH

Built 2004 Load: 32.4 t ADT: 324

WILSON ROAD

Over: BRANCH DUCK CREEK

0.4 MI. W. S.R. 49, Mercer, OH

Built 2001 Load: 32.4 t ADT: 60

GAUSE ROAD

Over: LITTLE BEAVER CREEK

0.1 MI N MENCHHOFER ROAD, Mercer, OH

Built 1985 Load: 32.4 t ADT: 185

SLAVIK ROAD

Over: LITTLE BEAVER CREEK

0.4 MI W GAUSE RD, Mercer, OH

Built 1984 Load: 32.4 t ADT: 351

WILSON RD

Over: BIG BLACKCREEK

0.1 MI. WEST HILL RD, Mercer, OH

Built 2002 Load: 32.4 t ADT: 60

PHILOTHEA ROAD

Over: BRANCH COLDWATER CREEK

0.4 MI W ST RT 118, Mercer, OH

Built 1964 Load: 32.4 t ADT: 991

BELL ROAD

Over: HARDIN CREEK

0.3 MI E ST RT 118, Mercer, OH

Built 1988 Load: 32.4 t ADT: 291

MANLEY ROAD

Over: BIG BLACKCREEK

0.1 MI W. HILL ROAD, Mercer, OH

Built 2005 Load: 32.4 t ADT: 324

ROCKFORD WEST T236

Over: DUCK CREEK

0.24 MI. E. OF STATELINE, Mercer, OH

Built 2008 Load: 32.4 t ADT: 324

DEPWEG ROAD

Over: BURNTWOOD CREEK

W OF US 127 1.2 MI, Mercer, OH

Built 1991 Load: 32.4 t ADT: 136

KUHN RD

Over: HARDIN CREEK

E OF SR 118 0.9 MI, Mercer, OH

Built 1993 Load: 32.4 t ADT: 97

NEPTUNE MENDON RD

Over: EIGHTMILE CREEK

0.3 MI S DENNY ROAD, Mercer, OH

Built 1900 Load: 32.4 t ADT: 133

SIEGRIST JUTTE RD

Over: BRANCH LITTLE BEAR CREEK

0.4 MI W BURK-ST HENRY RD, Mercer, OH

Built 1999 Load: 32.4 t ADT: 496

TAMA ROAD

Over: TWELVE MILE CREEK

E OF US127 1.0 MI, Mercer, OH

Built 1994 Load: 32.4 t ADT: 182

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