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)

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.

Related

Browse all → | Rankings →
Data sourced from official U.S. government datasets. See our methodology for details. Retrieved and formatted by PlainBridges Editorial