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 358,HADLEY ROAD

Fair

Over: OVER SHENANGO RIVER BR

OTTER CREEK TOWNSHIP, Mercer, PA

Built 1953 Load: 46.3 t ADT: 3,344

BRIDGE 416,T-668

Fair

Over: OVER MORRISON RUN

PIERSON RD.SANDY CREEK, Mercer, PA

Built 1962 Load: 46.3 t ADT: 22

BRIDGE 1904,T-555

Fair

Over: OVER LACKAWANNOCK CREEK

FULLINGMILL RD.,JEFFERSON, Mercer, PA

Built 1998 Load: 46.3 t ADT: 602

SR 62,FRANKLIN RD.

Fair

Over: OVER YELLOW CREEK

JACKSON TOWNSHIP, Mercer, PA

Built 1966 Load: 48.1 t ADT: 2,413

BRIDGE 909,T-642

Fair

Over: OVER LITTLE SHENANGO R.

LONG HILL,OTTER CREEK TWP, Mercer, PA

Built 1984 Load: 48.1 t ADT: 134

BRIDGE 3104,E.PINE

Fair

Over: OVER WOLF CREEK

EAST PINE ST,GROVE CITY, Mercer, PA

Built 1915 Load: 48.1 t ADT: 3,191

SR 80,WB

Fair

Over: OVER HARTHEGIG RUN

LACKAWANNOCK TOWNSHIP, Mercer, PA

Built 1965 Load: 49.0 t ADT: 11,377

SR 3032,CONNELY BL

Fair

Over: OVER SHENANGO RIVER

CITY OF SHARON, Mercer, PA

Built 1968 Load: 49.9 t ADT: 7,324

BRIDGE 2325,T-461

Fair

Over: OVER BOBBY RUN

ROMBOLD RD.,HERMITAGE, Mercer, PA

Built 1958 Load: 49.9 t ADT: 1,027

SR 358,HADLEY ROAD

Fair

Over: OVER SHENANGO RIVER BR

OTTER CREEK TOWNSHIP, Mercer, PA

Built 1953 Load: 50.8 t ADT: 3,344

BRIDGE 1514,T-732

Fair

Over: OVER COOLSPRING CREEK BR

SKUNK RUN, FAIRVIEW TWP., Mercer, PA

Built 1991 Load: 52.6 t ADT: 147

SR 4003,GOOD HOPE

Fair

Over: OVER BIG RUN TRIB

WEST SALEM TOWNSHIP, Mercer, PA

Built 1914 Load: 54.4 t ADT: 483

BRIDGE 2810,T-376

Fair

Over: OVER TURKEY RUN

CAMPGROUND, SHENANGO TWP, Mercer, PA

Built 1966 Load: 62.2 t ADT: 62

SR 358,HADLEY ROAD

Fair

Over: OVER LITTLE SHENANGO TR

OTTER CREEK TOWNSHIP, Mercer, PA

Built 1934 Load: 63.5 t ADT: 3,344

SR 80,EB

Fair

Over: OVER HARTHEGIG RUN

LACKAWANNOCK TOWNSHIP, Mercer, PA

Built 1965 Load: 64.4 t ADT: 11,198

SR 4019,METHODIST

Fair

Over: OVER LITTLE SHENANGO R

SUGAR GROVE TOWNSHIP, Mercer, PA

Built 1933 Load: 68.9 t ADT: 1,054

BRIDGE 2812,HAYWD

Fair

Over: OVER HOGBACK RUN

HAYWOOD ST.WEST MIDDLESEX, Mercer, PA

Built 1928 Load: 69.9 t ADT: 41

SR 3030,BUDD ST

Fair

Over: OVER SHENANGO RIVER

CITY OF SHARON, Mercer, PA

Built 1965 Load: 77.1 t ADT: 3,257

SR 62,SHENANGO EXP

Fair

Over: PINE HOLLOW CREEK BR

CITY OF HERMITAGE, Mercer, PA

Built 1955 Load: 85.3 t ADT: 5,419

SR 62,CONNELLY BLV

Fair

Over: OVER PINE RUN

CITY OF SHARON, Mercer, PA

Built 1955 Load: 99.8 t ADT: 10,523

SR 62,CONNELLY BLV

Fair

Over: OVER PINE RUN

CITY OF HERMITAGE, Mercer, PA

Built 1955 Load: 99.8 t ADT: 10,523

Campground Road

Good

Over: Brush Run

Shenango Day Use Area, Mercer, PA

Built 1975 ADT: 50

BRIDGE 1202,T-807

Good

Over: OVER MILL CREEK

MILL CREEK RD.,MILLCK TWP, Mercer, PA

Built 1974 Load: 10.9 t ADT: 122

BRIDGE 118,T-372

Good

Over: OVER BIG RUN

N.MAYVILLE RD.,GREENE TWP, Mercer, PA

Built 1976 Load: 15.4 t ADT: 201

BRIDGE 503,T-820

Good

Over: OVER NORTH DEER CREEK

DEER CREEK RD,DEER CREEK, Mercer, PA

Built 1975 Load: 17.2 t ADT: 58

BRIDGE 1308,T-651

Good

Over: OVER CHESTNUT CREEK

COLT ROAD,PYMATUNING TWP., Mercer, PA

Built 1975 Load: 17.2 t ADT: 202

BRIDGE 1311,T-651

Good

Over: OVER BIG RUN

COLT RD,PYMATUNING TWP., Mercer, PA

Built 1975 Load: 19.1 t ADT: 1,084

BRIDGE 3004,T-696

Good

Over: OVER MILL CREEK

MILL RUN RD, SPRINGFIELD, Mercer, PA

Built 1987 Load: 23.6 t ADT: 59

SR 2004,MILBURN RD

Good

Over: NESHANNOCK CK

SPRINGFIELD TOWNSHIP, Mercer, PA

Built 2007 Load: 32.4 t ADT: 245

SR 79,NB/SB

Good

Over: OVER PINE RUN

FINDLEY TOWNSHIP, Mercer, PA

Built 1963 Load: 32.7 t ADT: 17,992

SR 158,MERCER ROAD

Good

Over: OVER NESHANNOCK CREEK TR

WILMINGTON TOWNSHIP, Mercer, PA

Built 1984 Load: 32.7 t ADT: 1,443

SR 4025,FREDONIA R

Good

Over: MILL RUN

FREDONIA BOROUGH, Mercer, PA

Built 1977 Load: 32.7 t ADT: 546

SR 1009,L. Wilhelm

Good

Over: LITTLE SHENANGO RIVER

PERRY TWP, Mercer, PA

Built 2011 Load: 32.7 t ADT: 465

SR 718,IVANHOE RD

Good

Over: MCCULLOUGH RUN

SOUTH PYMATUNING TWP, Mercer, PA

Built 2013 Load: 32.7 t ADT: 1,305

SR 1015 CARLTON RD

Good

Over: FRENCH CREEK

FRENCH CREEK TWP., Mercer, PA

Built 2014 Load: 32.7 t ADT: 430

SR 718,WATER ST.

Good

Over: BIG RUN

CITY OF HERMITAGE, Mercer, PA

Built 2014 Load: 32.7 t ADT: 2,714

SR 19,FRANKLIN ST.

Good

Over: OVER MUNNEL RUN

COOLSPRING TOWNSHIP, Mercer, PA

Built 2018 Load: 32.7 t ADT: 7,208

SR 318,W.MDLSX-MRC

Good

Over: SHENANGO RIVER

WEST MIDDLESEX BOROUGH, Mercer, PA

Built 2018 Load: 32.7 t ADT: 4,394

SR 2002,LEESBRG RD

Good

Over: HUNTER RUN

SPRINGFIELD TWP., Mercer, PA

Built 2014 Load: 33.0 t ADT: 1,010

2116 T-613

Good

Over: UNK TR TO FOX RUN

PARKER ROAD LAKE TWP, Mercer, PA

Built 2017 Load: 33.7 t ADT: 41

BRIDGE 2303, T-388

Good

Over: OVER SHENANGO RIVER

KELLY ROAD, HERMITAGE, Mercer, PA

Built 2022 Load: 33.7 t ADT: 732

SR 0158, Mercer Rd

Good

Over: W BR LITTLE NESHANNOCK C

WILMINGTON TWP, Mercer, PA

Built 2011 Load: 34.0 t ADT: 2,427

LAMOR ROAD

Good

Over: LACKAWANNOCK CREEK

JEFFERSON TOWNSHIP, Mercer, PA

Built 2017 Load: 34.0 t ADT: 393

SR 2001,N.CASTLE R

Good

Over: OVER INDIAN RUN

WILMINGTON TOWNSHIP, Mercer, PA

Built 2020 Load: 34.0 t ADT: 902

SR 258, Lake Road

Good

Over: DALEY RUN

JEFFERSON TWP, Mercer, PA

Built 2011 Load: 34.3 t ADT: 606

SR 19, PERRY HIGHW

Good

Over: SANDY CREEK

SANDY CREEK TWP, Mercer, PA

Built 2011 Load: 34.3 t ADT: 2,559

BRIDGE 802,N.RACE

Good

Over: OVER LITTLE SHENANGO

N. RACE STEET GREENVILLE, Mercer, PA

Built 2016 Load: 34.3 t ADT: 1,756

SANDY LAKE RD

Good

Over: Mill Creek

NEW LEBANON BOROUGH, Mercer, PA

Built 2017 Load: 35.0 t ADT: 2,524

SR 2002,LEESBRG RD

Good

Over: OVER NESHANNOCK CREEK

SPRINGFIELD TOWNSHIP, Mercer, PA

Built 2023 Load: 35.0 t ADT: 663

SR 19,PERRY HWY.

Good

Over: BLACK RUN

SANDY CREEK TWP, Mercer, PA

Built 2015 Load: 35.3 t ADT: 2,559

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.