Mercer County, PA

273 public highway bridges

Mercer County Bridge Snapshot

Mercer County, Pennsylvania contains 273 public highway bridges in the FHWA National Bridge Inventory. Roughly 42.1% are rated “Good,” 30.4% “Fair,” 13.6% “Poor,” and 13.6% 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 PA 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.

273
Total Bridges
42.1%
Good
13.6%
Poor
13.6%
Structurally Deficient

Condition Distribution

Good
42.1% (115)
Fair
30.4% (83)
Poor
13.6% (37)
SD
13.6% (37)

All Bridges (273)

BRIDGE 816,LANCAST

Good

Over: OVER SAUL RUN

LANCASTER AVE.,GREENVILLE, Mercer, PA

Built 1982 Load: 47.2 t ADT: 184

SR 2014,SCRUBGRASS

Good

Over: WOLF CREEK

WOLF, Mercer, PA

Built 2012 Load: 48.0 t ADT: 472

BRIDGE 3116

Good

Over: OVER WOLF CREEK

_CHESTNUT STREET, GROVE C, Mercer, PA

Built 2007 Load: 48.1 t ADT: 1,226

BRIDGE 3108, T-878

Good

Over: BR. WOLF CREEK

DIAMOND ROAD, PINE TWP, Mercer, PA

Built 2008 Load: 48.1 t ADT: 261

MiddlesexMercer Rd

Good

Over: Little Neshannock Creek

LACKAWANNOCK TOWNSHIP, Mercer, PA

Built 2017 Load: 48.3 t ADT: 2,456

BRIDGE 908,T-614

Good

Over: OVER LITTLE SHENANGO R.

FREELAND RD. OTTER CREEK, Mercer, PA

Built 1984 Load: 49.0 t ADT: 511

BRIDGE 608,T-874

Good

Over: OVER NORTH DEER CREEK

LOWER RD.,FRENCH CREEK, Mercer, PA

Built 1997 Load: 49.0 t ADT: 24

BRIDGE 2710,T-481

Good

Over: OVER WOLF CREEK EAST BR.

E. GILMORE RD. WOLF CRK., Mercer, PA

Built 1996 Load: 49.0 t ADT: 231

SR 2025,N.LIBERTY

Good

Over: LAKE BARMORE OUTLET

PINE TOWNSHIP, Mercer, PA

Built 2007 Load: 49.0 t ADT: 2,906

BRIDGE 2631,T-724

Good

Over: OVER PINE RUN

CRIBBS ROAD, FINDLEY TWP, Mercer, PA

Built 1994 Load: 49.9 t ADT: 61

BRIDGE 1601,T-762

Good

Over: OVER LITTLE SHENANGO

CANON RD.,LAKE TOWNSHIP, Mercer, PA

Built 1997 Load: 50.8 t ADT: 978

SR 4021,BEATTY SCH

Good

Over: OVER MCCAIN RUN

SALEM TOWNSHIP, Mercer, PA

Built 1997 Load: 50.8 t ADT: 320

BRIDGE 2005,T-603

Good

Over: OVER COOLSPRINGS CREEK

N.MILL RD.,COOLSPRING TWP, Mercer, PA

Built 1984 Load: 51.7 t ADT: 78

BRIDGE 2712,T-459

Good

Over: OVER WOLF CREEK EAST BR.

BRINKLEY RD. WOLF CREEK, Mercer, PA

Built 1999 Load: 51.7 t ADT: 73

SR 258 Butler Pike

Good

Over: OVER TINKERS RUN

LIBERTY TWP, Mercer, PA

Built 2010 Load: 51.7 t ADT: 2,373

BRIDGE 3201,AIRPRT

Good

Over: OVER WOLF CREEK

AIRPORT RD.,LIBERTY TWP., Mercer, PA

Built 1985 Load: 52.6 t ADT: 1,412

BRIDGE 910,T-614

Good

Over: OVER LT.SHENANGO RIVER

HENRY RD,OTTER CREEK TWP., Mercer, PA

Built 1963 Load: 53.5 t ADT: 755

SR 3020. Lamor Rd

Good

Over: TR TO MAGARGEE RUN

JEFFERSON TWP, Mercer, PA

Built 2011 Load: 55.1 t ADT: 723

SR 318 HUBB-W MID

Good

Over: SHENANGO RIVER TRIB

SHENANGO TWP, Mercer, PA

Built 2014 Load: 55.1 t ADT: 3,113

SR 3022,RUTLEDGE R

Good

Over: OVER LACAWANNOCK CREEK

JEFFERSON TOWNSHIP, Mercer, PA

Built 1999 Load: 55.3 t ADT: 258

SR 2014,SCRUBGRASS

Good

Over: OVER MILL CREEK

FINDLEY TOWNSHIP, Mercer, PA

Built 2005 Load: 56.2 t ADT: 1,673

SR 4021,BEATTY SCH

Good

Over: OVER SHENANGO RIVER TRIB

SALEM TOWNSHIP, Mercer, PA

Built 2001 Load: 57.2 t ADT: 320

BRIDGE 2711,T-914

Good

Over: OVER WOLF CREEK BRANCH

SOPHER ROAD,WOLF CREEK, Mercer, PA

Built 1985 Load: 58.1 t ADT: 39

T-889, SUNOL RD.

Good

Over: NORTH DEER CK.

_DEER CREEK TOWNSHIP, Mercer, PA

Built 2007 Load: 58.1 t ADT: 41

BRIDGE 112,T-374

Good

Over: OVER SUGAR RUN

SUGAR RUN RD.,GREENE TWP., Mercer, PA

Built 1990 Load: 59.9 t ADT: 81

BAKER HILL ROAD

Good

Over: SUGAR RUN

DELAWARE TWP., Mercer, PA

Built 2010 Load: 59.9 t ADT: 226

SR 718,STATE ST

Good

Over: SHENANGO RIVER

CITY SHARON, Mercer, PA

Built 2007 Load: 61.7 t ADT: 4,628

SR 3022,RUTLEDGE R

Good

Over: OVER LACKAWANNOCK CREEK

JEFFERSON TOWNSHIP, Mercer, PA

Built 1999 Load: 67.1 t ADT: 258

SR 4021,BEATTY SCH

Good

Over: SHENANGO RIVER TRIB

SUGAR GROVE TOWNSHIP, Mercer, PA

Built 2003 Load: 68.0 t ADT: 132

SR 1004, Stoneboro

Good

Over: COOLSPRING CREEK

FAIRVIEW TWP, Mercer, PA

Built 2010 Load: 69.9 t ADT: 391

SR 4001, N SUMMIT

Good

Over: SUGAR RUN TRIB

GREENE TWP, Mercer, PA

Built 2013 Load: 74.5 t ADT: 190

BRIDGE 2106

Good

Over: OVER UNNAMED TR.FOX RUN

FOX MINE RD.JACKSON TWP., Mercer, PA

Built 2006 Load: 77.1 t ADT: 444

BRIDGE 3113,T-888

Good

Over: OVER SWAMP RUN

TIE LINE RD,PINE TOWNSHIP, Mercer, PA

Built 1968 Load: 78.0 t ADT: 561

BRIDGE 2903,T-548

Good

Over: OVER LT. NESHANNOCK CK.B

NO. 8 RD.,WILMINGTON TWP., Mercer, PA

Built 1956 Load: 83.5 t ADT: 132

SR 1011

Good

Over: PINE RUN

PERRY TOWNSHIP, Mercer, PA

Built 1907 Load: 88.9 t ADT: 431

BRIDGE 2323

Good

Over: OVER HOGBACK RUN

HOGBACK RD., HERMITAGE, Mercer, PA

Built 2007 Load: 99.8 t ADT: 177

LEBANON AVE.

Poor

Over: OVER SAUL RUN

LEBANON AVE.,GREENVILLE, Mercer, PA

Built 1934 Load: 3.6 t ADT: 214

BRIDGE 2606,T-401

Poor

Over: OVER NESHANNOCK CREEK

OLD MERCER RD E.LACK TWP, Mercer, PA

Built 1922 Load: 8.2 t ADT: 375

SR 4021, ATLANTIC

Poor

Over: BLUFF RUN

SUGAR GROVE TOWNSHIP, Mercer, PA

Built 1952 Load: 19.1 t ADT: 520

SR 2017,N.FOSTER R

Poor

Over: OVER COOL SPRING CREEK

FAIRVIEW TOWNSHIP, Mercer, PA

Built 1952 Load: 20.9 t ADT: 507

BRIDGE 3011,T-722

Poor

Over: OVER MILL RUN

N.SPRING RD.SPRINGFIELD, Mercer, PA

Built 1922 Load: 22.7 t ADT: 98

SR 2014,SCRUBGRASS

Poor

Over: OVER WOLF CREEK

WOLF CREEK TOWNSHIP, Mercer, PA

Built 1939 Load: 25.4 t ADT: 472

BRIDGE 2339,SERVIC

Poor

Over: OVER PINE RUN

SERVICE AVE,SHARON, Mercer, PA

Built 1951 Load: 26.3 t ADT: 1,637

BRIDGE 1207,T-902

Poor

Over: OVER LITTLE SANDY CREEK

CRYSTAL SPRING,MILL CK., Mercer, PA

Built 1965 Load: 28.1 t ADT: 21

BRIDGE 1703,LACOCK

Poor

Over: OVER SANDY CREEK

LACOCK ST.,SANDY LAKE TWP, Mercer, PA

Built 1971 Load: 28.1 t ADT: 263

SR 62,FRANKLIN RD.

Poor

Over: FOX RUN

JACKSON TOWNSHIP, Mercer, PA

Built 1922 Load: 29.0 t ADT: 2,413

SR 173, GROVE CITY

Poor

Over: BLACK RUN

WOLF CREEK TOWNSHIP, Mercer, PA

Built 1923 Load: 29.0 t ADT: 3,657

BRIDGE 702,T-811

Poor

Over: OVER BIG RUN

WISE ROAD,WEST SALEM TWP., Mercer, PA

Built 1968 Load: 29.0 t ADT: 145

T-613,WILLIAMSON

Poor

Over: OVER BRANCH L. SHENANGO

WILLIAMSON,OTTER CREEK, Mercer, PA

Built 1934 Load: 31.8 t ADT: 31

SR 846,SARANAC RD.

Poor

Over: OVER SHENANGO RESERVOIR

SOUTH PYMATUNING TOWNSHIP, Mercer, PA

Built 1964 Load: 32.7 t ADT: 1,822

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