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 4021,CREEK RD

Poor

Over: OVER MORRISON RUN

PERRY TOWNSHIP, Mercer, PA

Built 1958 Load: 22.7 t ADT: 320

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

T499, ORR ROAD

Poor

Over: OVER B.&L.E. RAILROAD

ORR ROAD,COOLSPRINGS TWP., Mercer, PA

Built 1928 Load: 25.4 t ADT: 124

BRIDGE 2339,SERVIC

Poor

Over: OVER PINE RUN

SERVICE AVE,SHARON, Mercer, PA

Built 1951 Load: 26.3 t ADT: 1,637

BRIDGE 2111,T-784

Poor

Over: OVER YELLOW CREEK

HOSACK ROAD,JACKSON TWP., Mercer, PA

Built 1965 Load: 28.1 t ADT: 62

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

SR 19,PERRY HWY.

Poor

Over: OVER SHENANGO RIVER TRIB

PERRY TOWNSHIP, Mercer, PA

Built 1942 Load: 33.6 t ADT: 2,013

BRIDGE 2707,T-481

Poor

Over: OVER WOLF CREEK

EAST GILMORE RD,WOLF CRK, Mercer, PA

Built 1959 Load: 34.5 t ADT: 201

BRIDGE 2717,T-481

Poor

Over: OVER WOLF CREEK EAST BR.

EAST GILMORE RD.,WOLF CRK, Mercer, PA

Built 1959 Load: 36.3 t ADT: 390

SR 62,FRANKLIN RD.

Poor

Over: OVER SPRING CREEK

COOLSPRING TOWNSHIP, Mercer, PA

Built 1948 Load: 37.2 t ADT: 3,515

BRIDGE 1111,T-760

Poor

Over: OVER LITTLE SHENANGO

CARPENTER RD. NEW VERNON, Mercer, PA

Built 1961 Load: 42.6 t ADT: 76

BRIDGE 2904,T-546

Poor

Over: OVER LT.NESHANNOCK W. BR

BEND RD. WILMINGTON TWP., Mercer, PA

Built 1956 Load: 46.3 t ADT: 603

BRIDGE 2450, T-397

Poor

Over: OVER HARTHEGIG RUN

LACKAWANNOCK TWP, Mercer, PA

Built 1963 Load: 47.2 t ADT: 220

BRIDGE 3008,T-652

Poor

Over: OVER INDIAN RUN

CREEK RD.,SPRINGFIELD TWP, Mercer, PA

Built 1988 Load: 52.6 t ADT: 81

SR 58,MAIN STREET

Poor

Over: OVER WOLF CREEK

GROVE CITY BOROUGH, Mercer, PA

Built 1967 Load: 61.7 t ADT: 9,802

BRIDGE 2310,T-446

Poor

Over: OVER GOLDEN RUN

ROBERTSON RD.HERMITAGE, Mercer, PA

Built 1956 Load: 89.7 t ADT: 276

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.