Mercer County, PA

273 public highway bridges

Mercer County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Mercer County, Pennsylvania contains 273 public highway bridges. Roughly 42.1% are rated “Good,” 30.4% “Fair,” and 13.6% “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.

273
Total Bridges
42.1%
Good
30.4%
Fair
13.6%
Poor Condition

Condition Distribution

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

All Bridges (273)

SR 173, LIBERTY ST

Good

Over: SWAMP RUN

PINE TWP, Mercer, PA

Built 2014 Load: 36.3 t ADT: 4,168

BRIDGE 651, T-860

Good

Over: POWDERMILL RUN

FRENCH CREEK TWP, Mercer, PA

Built 2012 Load: 36.9 t ADT: 850

BR 1704

Good

Over: SANDY LAKE OUTLET

WALNUT ST SANDY LAKE, Mercer, PA

Built 2017 Load: 36.9 t ADT: 223

SR 258,BUTLER PIKE

Good

Over: OVER NESHANNOCK CREEK

FINDLEY TOWNSHIP, Mercer, PA

Built 1998 Load: 37.2 t ADT: 2,720

BRIDGE 499,T-907

Good

Over: OVER SANDY CREEK

COUNTY LINE, SANDY CREEK, Mercer, PA

Built 1999 Load: 37.2 t ADT: 188

SR 158, Mercer Rd.

Good

Over: LITTLE NESHANNOCK CREEK

WILMINGTON TOWNSHIP, Mercer, PA

Built 2010 Load: 37.2 t ADT: 2,427

SR 60,BROADWAY AVE

Good

Over: BOBBY RUN

CITY OF HERMITAGE, Mercer, PA

Built 1950 Load: 37.3 t ADT: 7,590

BRIDGE 2809,T-955

Good

Over: OVER TURKEY RUN

OAK HILL RD.,SHENANGO TWP, Mercer, PA

Built 2016 Load: 37.3 t ADT: 97

SR 173, Grove City

Good

Over: WOLF CREEK BRANCH

WORTH TWP, Mercer, PA

Built 2010 Load: 37.9 t ADT: 1,543

BRIDGE 1112,T-695

Good

Over: OVER LITTLE SHENANGO BR.

SHELL ROAD,NEW VERNON TWP, Mercer, PA

Built 1994 Load: 38.1 t ADT: 56

SR 208,NORTH ST.

Good

Over: OVER WOLF CREEK

GROVE CITY BOROUGH, Mercer, PA

Built 2004 Load: 38.1 t ADT: 3,022

SR 62 EXPRESSWAY

Good

Over: OVER NS RAILROAD

CITY OF SHARON, Mercer, PA

Built 2010 Load: 38.1 t ADT: 9,562

SR 4024,BAKER HILL

Good

Over: LAWANGO CREEK

DELAWARE TOWNSHIP, Mercer, PA

Built 2010 Load: 38.1 t ADT: 226

SR 19

Good

Over: NESHANNOCK CREEK

SPRINGFIELD TWP., Mercer, PA

Built 2013 Load: 38.9 t ADT: 2,520

SR 18,COLLEGE AVE.

Good

Over: OVER LITTLE SHENANGO R

GREENVILLE BOROUGH, Mercer, PA

Built 1986 Load: 39.0 t ADT: 5,803

SR 4006, PORTER RD

Good

Over: LITTLE SHENANGO RIVER

WEST SALEM TOWNSHIP, Mercer, PA

Built 2005 Load: 39.0 t ADT: 1,277

WILLIAMSON ROAD

Good

Over: OVER LT.SHENANGO RIVER

HEMPFIELD TOWNSHIP, Mercer, PA

Built 2006 Load: 39.0 t ADT: 2,248

SR 58, MERCER ROAD

Good

Over: MOURY RUN

HEMPFIELD TWP, Mercer, PA

Built 2013 Load: 39.5 t ADT: 5,150

BUTLER PIKE

Good

Over: BLACK RUN

LIBERTY TOWNSHIP, Mercer, PA

Built 2010 Load: 39.9 t ADT: 2,373

SR 4021, Atlantic

Good

Over: OVER HOLLOW RUN

SUGAR GROVE TWP, Mercer, PA

Built 2010 Load: 39.9 t ADT: 520

BRIDGE 1416, T-634

Good

Over: OTTER CREEK

REDFOOT RD, DEAWARE TWP, Mercer, PA

Built 2015 Load: 40.2 t ADT: 43

SR 173,GROVE CITY

Good

Over: TRIB TO WOLF CREEK

WORTH TWP, Mercer, PA

Built 2013 Load: 40.5 t ADT: 1,873

SR 62, MAIN STREET

Good

Over: OVER SANDY CREEK

SANDY LAKE BOROUGH, Mercer, PA

Built 1991 Load: 40.8 t ADT: 1,469

SR 846,RIVER ROAD

Good

Over: OVER MCCULLOUGH RUN

CITY OF HERMITAGE, Mercer, PA

Built 1997 Load: 40.8 t ADT: 1,822

BRIDGE 1915,T-549

Good

Over: OVER MAGARGEE RUN

CLAY FURNACE,JEFFERSON, Mercer, PA

Built 1973 Load: 40.8 t ADT: 85

SR 518,LONGVIEW RD

Good

Over: OVER BOBBY RUN

CITY OF HERMITAGE, Mercer, PA

Built 1997 Load: 40.8 t ADT: 5,955

SR 4017,WARNER RD

Good

Over: OVER B.&L.E. RAILROAD

SUGAR GROVE TOWNSHIP, Mercer, PA

Built 1997 Load: 40.8 t ADT: 1,428

SR 18,MAIN STREET

Good

Over: OVER SHENANGO RIVER

GREENVILLE BOROUGH, Mercer, PA

Built 1997 Load: 40.8 t ADT: 10,714

SR 3018,BUCKEYE DR

Good

Over: OVER MCCULLOUGH RUN

SOUTH PYMATUNING TOWNSHIP, Mercer, PA

Built 1999 Load: 40.8 t ADT: 2,356

BRIDGE 2629,T-944

Good

Over: OVER PINE RUN

UBER ROAD,FINDLEY TWP., Mercer, PA

Built 2000 Load: 40.8 t ADT: 38

BRIDGE 2709,T-912

Good

Over: OVER WOLF CREEK E.BRANCH

PATTERSON SCHL.,WOLF CK., Mercer, PA

Built 2001 Load: 40.8 t ADT: 67

BUTLER PIKE

Good

Over: PINE RUN

FINDLEY TOWNSHIP, Mercer, PA

Built 2009 Load: 40.8 t ADT: 2,720

KINSMEN ROAD

Good

Over: BR. SUGAR CREEK

GREENE TOWNSHIP, Mercer, PA

Built 2009 Load: 40.8 t ADT: 1,159

SR 258, LAKE ROAD

Good

Over: OVER LACAWANNOCK CREEK

JEFFERSON TOWNSHIP, Mercer, PA

Built 1997 Load: 41.7 t ADT: 931

BRIDGE 1917,T-496

Good

Over: OVER MAGARGEE RUN

CLAYFURNACE RD JEFFERSON, Mercer, PA

Built 2002 Load: 41.7 t ADT: 155

BRIDGE 2630,T-403

Good

Over: OVER PINE RUN

MCCLELLAND RD.,FINDLEY, Mercer, PA

Built 1988 Load: 42.6 t ADT: 182

BRIDGE 607,T-846

Good

Over: OVER NORTH DEER CREEK

BRANCH RD.,FRENCH CREEK, Mercer, PA

Built 1990 Load: 42.6 t ADT: 31

SR 62,FRANKLIN RD.

Good

Over: OVER OTTER CREEK

COOLSPRINGS TOWNSHIP, Mercer, PA

Built 1997 Load: 42.6 t ADT: 3,515

SR 58,KINSMAN ROAD

Good

Over: OVER SUGAR CREEK

GREEN TOWNSHIP, Mercer, PA

Built 2001 Load: 42.6 t ADT: 1,267

BRIDGE 2324,T-307

Good

Over: OVER BOBBY RUN

LYNNWOOD RD.,HERMITAGE, Mercer, PA

Built 2003 Load: 42.6 t ADT: 1,423

SANDY LAKE ROAD

Good

Over: DEER CREEK

FRENCH CREEK TWP, Mercer, PA

Built 2009 Load: 42.6 t ADT: 1,489

SR 80,EB

Good

Over: OVER ABND'N.RR/NESHNK.CK

FINDLEY TOWNSHIP, Mercer, PA

Built 1998 Load: 43.5 t ADT: 12,524

SR2005IRISHTOWN RD

Good

Over: OVER B.&L.E. R.R.

PINE TOWNSHIP, Mercer, PA

Built 2015 Load: 45.0 t ADT: 1,800

SR 80,EB

Good

Over: OVER WOLF CREEK

WOLF CREEK TOWNSHIP, Mercer, PA

Built 1965 Load: 45.4 t ADT: 10,833

SR 3008,E.STATE ST

Good

Over: OVER SHENANGO RIVER TRIB

CITY OF HERMITAGE, Mercer, PA

Built 1996 Load: 45.4 t ADT: 10,858

BRIDGE 1905,T-584

Good

Over: OVER LACKAWANNOCK CREEK

N.BEND RD,JEFFERSON TWP., Mercer, PA

Built 1965 Load: 45.4 t ADT: 94

BRIDGE 1215,T-918

Good

Over: OVER LITTLE SANDY CREEK

DEEMERS DAM RD.,MILL CK., Mercer, PA

Built 1997 Load: 45.4 t ADT: 27

BRIDGE 813,T-470

Good

Over: OVER SHENANGO RIVER BR

HAMBURG RD HEMPFIELD TWP, Mercer, PA

Built 2003 Load: 45.4 t ADT: 3,134

BRIDGE 613,T-859

Good

Over: OVER NORTH DEER CREEK

CREEK RD.,FRENCH CREEK TP, Mercer, PA

Built 1965 Load: 46.0 t ADT: 97

BRIDGE 2811

Good

Over: LITTLE DEER CK

RIGGS RD.,SHENANGO TWP., Mercer, PA

Built 2007 Load: 46.3 t ADT: 233

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.