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 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 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

BRIDGE 250,T-568

Structurally Deficient

Over: OVER BLUFF RUN

CALVIN RD,SUGAR GROVE TWP, Mercer, PA

Built 1900

BRIDGE 2805,T-303

Structurally Deficient

Over: OVER SHENANGO RIVER TRIB

HEASLEY RD SHENANGO TWP, Mercer, PA

Built 1922 Load: 0.9 t ADT: 89

TOWNSHIP ROAD 182

Structurally Deficient

Over: BIG RUN

0.7 MI. S. CR186, Mercer, PA

Built 1964 Load: 2.7 t ADT: 324

BRIDGE 1015,T-740

Structurally Deficient

Over: OVER LITTLE SHENANGO R.

MILL RD, PERRY TOWNSHIP, Mercer, PA

Built 1885 Load: 6.4 t ADT: 57

BRIDGE 1017,T-693

Structurally Deficient

Over: OVER PINE RUN

YEAGER RD, PERRY TOWNSHIP, Mercer, PA

Built 1961 Load: 10.9 t ADT: 31

BRIDGE 124,T-480

Structurally Deficient

Over: OVER BRANCH OF SHENANGO

MURPHY ROAD,GREENE TWP, Mercer, PA

Built 1963 Load: 11.8 t ADT: 78

BRIDGE 2329,WENGLE

Structurally Deficient

Over: OVER PINE HOLLOW RUN

WENGLER AVE.,SHARON, Mercer, PA

Built 1929 Load: 11.8 t ADT: 268

BRIDGE 2108,T-784

Structurally Deficient

Over: OVER YELLOW CREEK BRANCH

HOSACK RD,JACKSON TWP., Mercer, PA

Built 1965 Load: 12.7 t ADT: 241

BRIDGE 2007,T-688

Structurally Deficient

Over: OVER OTTER CREEK

TAIT RD,COOLSPRING TWP., Mercer, PA

Built 1966 Load: 20.0 t ADT: 295

BRIDGE 199,T-301

Structurally Deficient

Over: OVER SUGAR RUN

W COUNTY LINE, GREENE TWP, Mercer, PA

Built 1972 Load: 20.9 t ADT: 160

SR 4021,CREEK RD

Structurally Deficient

Over: OVER MORRISON RUN

PERRY TOWNSHIP, Mercer, PA

Built 1958 Load: 22.7 t ADT: 320

T499, ORR ROAD

Structurally Deficient

Over: OVER B.&L.E. RAILROAD

ORR ROAD,COOLSPRINGS TWP., Mercer, PA

Built 1928 Load: 25.4 t ADT: 124

BRIDGE 2111,T-784

Structurally Deficient

Over: OVER YELLOW CREEK

HOSACK ROAD,JACKSON TWP., Mercer, PA

Built 1965 Load: 28.1 t ADT: 62

BRIDGE 1111,T-760

Structurally Deficient

Over: OVER LITTLE SHENANGO

CARPENTER RD. NEW VERNON, Mercer, PA

Built 1961 Load: 42.6 t ADT: 76

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