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 1009,L.WILHELM

Fair

Over: OVER LAKE WILHELM

NEW VERNON TOWNSHIP, Mercer, PA

Built 1969 Load: 29.9 t ADT: 1,001

SR 2024,KILGORE RD

Fair

Over: OVER WOLF CREEK

WORTH TOWNSHIP, Mercer, PA

Built 1952 Load: 29.9 t ADT: 297

SR 79,NB

Fair

Over: OVER LT SHENANGO R & RR

LAKE TOWNSHIP, Mercer, PA

Built 1969 Load: 30.8 t ADT: 5,845

SR 173,MAIN STREET

Fair

Over: OVER SANDY CREEK

SANDY LAKE BOROUGH, Mercer, PA

Built 1933 Load: 30.8 t ADT: 2,842

SR 3007,PLSKI-MRCR

Fair

Over: OVER W BRANCH NESHANNOCK

WILMINGTON TOWNSHIP, Mercer, PA

Built 1962 Load: 31.8 t ADT: 658

BRIDGE 2113,T-774

Fair

Over: OVER YELLOW CREEK

S.FOSTER RD.,JACKSON TWP., Mercer, PA

Built 1958 Load: 31.8 t ADT: 437

SR 358,HADLEY RDAD

Fair

Over: OVER LITTLE SHENANGO TR

PERRY TOWNSHIP, Mercer, PA

Built 1984 Load: 32.7 t ADT: 2,452

SR 2022,MILLBROOK

Fair

Over: OVER WOLF CREEK BRANCH

WORTH TOWNSHIP, Mercer, PA

Built 1976 Load: 32.7 t ADT: 139

SR 3019,ORANGEVILL

Fair

Over: OVER TOWEL WORKS RUN

CITY OF HERMITAGE, Mercer, PA

Built 1957 Load: 32.7 t ADT: 380

SR 3035,DUTCH LANE

Fair

Over: OVER PINE HOLLOW RUN

MUNICIPALITY OF HERMITAGE, Mercer, PA

Built 1973 Load: 32.7 t ADT: 4,581

BRIDGE 817,T-470

Fair

Over: OVER MATHAY RUN

HAMBURG RD,HEMPFIELD TWP., Mercer, PA

Built 1963 Load: 32.7 t ADT: 3,449

BRIDGE 1110,T-738

Fair

Over: OVER PINE RUN

CAREY RD.,NEW VERNON TWP., Mercer, PA

Built 1958 Load: 32.7 t ADT: 32

BRIDGE 2813,T-412

Fair

Over: OVER HOG BACK RUN

LONGVIEW RD,SHENANGO TWP., Mercer, PA

Built 1966 Load: 32.7 t ADT: 827

SR 358, HADLEY RD.

Fair

Over: SHENANGO RIVER TR

OTTER CREEK TOWNSHIP, Mercer, PA

Built 1935 Load: 33.6 t ADT: 3,344

BRIDGE 506,T-825

Fair

Over: OVER SCHOFIELDS RUN

SMOLA RD.,DEER CREEK TWP, Mercer, PA

Built 1979 Load: 33.6 t ADT: 36

SR 3015,WANSACK RD

Fair

Over: TRIB TO SHENANGO RIVER

SHENANGO TOWNSHIP, Mercer, PA

Built 1962 Load: 34.5 t ADT: 453

SR 79,SB

Fair

Over: OVER LAKE WILHELM

NEW VERNON TOWNSHIP, Mercer, PA

Built 1969 Load: 35.4 t ADT: 6,474

SR 3022,RUTLEDGE R

Fair

Over: OVER SHENANGO RIVER

JEFFERSON TOWNSHIP, Mercer, PA

Built 1967 Load: 35.4 t ADT: 258

BRIDGE 2109,T-786

Fair

Over: OVER FOX RUN

CLARK ROAD,JACKSON TWP., Mercer, PA

Built 1976 Load: 35.4 t ADT: 93

SR 19, PERRY HWY.

Fair

Over: OVER OTTER CREEK TRIB

COOLSPRING TOWNSHIP, Mercer, PA

Built 1930 Load: 36.3 t ADT: 2,222

SR 62,E.STATE ST.

Fair

Over: OVER SHENANGO RIVER TRIB

CITY OF HERMITAGE, Mercer, PA

Built 1948 Load: 36.3 t ADT: 6,906

SR 2004,MILBURN RD

Fair

Over: OVER MILL RUN

SPRINGFIELD TOWNSHIP, Mercer, PA

Built 1992 Load: 36.3 t ADT: 245

SR 80, WB

Fair

Over: W BR LTL NESHANNOCK CRK.

SHENANGO TOWNSHIP, Mercer, PA

Built 1965 Load: 37.2 t ADT: 11,377

SR 3039,FLAT ROAD

Fair

Over: OVER LT NESHANNOCK CR TR

EAST LACKAWANNOCK TWP., Mercer, PA

Built 1892 Load: 37.2 t ADT: 462

SR 80,EB

Fair

Over: OVER LIT.NESHANNOCK CK

LACKAWANNOCK TOWNSHIP, Mercer, PA

Built 1965 Load: 38.1 t ADT: 11,198

SR 80,WB

Fair

Over: OVER LIT.NESHANNOCK CK

LACKAWANNOCK TOWNSHIP, Mercer, PA

Built 1966 Load: 38.1 t ADT: 11,377

BRIDGE 1508,T-660

Fair

Over: OVER OTTER CREEK BRANCH

MARSTELLER RD.,FREDONIA, Mercer, PA

Built 1982 Load: 39.0 t ADT: 327

SR 80, EB

Fair

Over: W BR LTL NESHANNOCK CRK

SHENANGO TOWNSHIP, Mercer, PA

Built 1965 Load: 39.9 t ADT: 11,198

SR 358,HADLEY ROAD

Fair

Over: OVER LITTLE SHENANGO TR

PERRY TOWNSHIP, Mercer, PA

Built 1929 Load: 39.9 t ADT: 1,870

SR 80,EB

Fair

Over: OVER ABANDON RR &SHNGO R

SHENANGO TOWNSHIP, Mercer, PA

Built 1966 Load: 40.8 t ADT: 13,514

SR 80,WB

Fair

Over: OVER ABANDON RR &SHNGO R

SHENANGO TOWNSHIP, Mercer, PA

Built 1966 Load: 40.8 t ADT: 13,487

SR 358,HADLEY ROAD

Fair

Over: OVER SANKEYS RUN

HEMPFIELD TOWNSHIP, Mercer, PA

Built 1953 Load: 40.8 t ADT: 5,707

BRIDGE 2704,T-882

Fair

Over: OVER WOLF CREEK

MONTGOMERY DAM,WOLF CREEK, Mercer, PA

Built 1985 Load: 40.8 t ADT: 48

SR 3009,BUCKWATER

Fair

Over: OVER LT NESHANNOCK CK

LACKAWANNOCK TOWNSHIP, Mercer, PA

Built 1954 Load: 41.7 t ADT: 378

BRIDGE 1509,T-599

Fair

Over: OVER OTTER CREEK

DELAWARE RD.,FAIRVIEW TWP, Mercer, PA

Built 1985 Load: 41.7 t ADT: 52

SR 80,WB

Fair

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

FINDLEY TOWNSHIP, Mercer, PA

Built 1999 Load: 42.6 t ADT: 12,975

BRIDGE 1203,T-918

Fair

Over: OVER MILL CREEK

FOSTER RD.,MILL CREEK TWP, Mercer, PA

Built 1986 Load: 42.6 t ADT: 58

BRIDGE 1312,T-587

Fair

Over: OVER BRUSH RUN

W.LAKE RD.PYMATUNING TWP., Mercer, PA

Built 1965 Load: 42.6 t ADT: 113

SR 3013 Orchard Rd

Fair

Over: TR LITTLE NESHANNOCK CK

WILMINGTON TWP, Mercer, PA

Built 2010 Load: 42.6 t ADT: 612

SR 80,EB

Fair

Over: OVER BLACK RUN

WOLF CREEK TOWNSHIP, Mercer, PA

Built 1965 Load: 43.5 t ADT: 12,564

SR 1008,DISTRICT R

Fair

Over: OTTER CREEK

DELAWARE TOWNSHIP, Mercer, PA

Built 1974 Load: 43.5 t ADT: 838

SR 1008,DISTRICT R

Fair

Over: OVER OTTER CREEK

DELEWARE TOWNSHIP, Mercer, PA

Built 1974 Load: 43.5 t ADT: 838

BRIDGE 906,T-717

Fair

Over: OVER OTTER CREEK

STRAUB ROAD,OTTER CREEK, Mercer, PA

Built 1985 Load: 43.5 t ADT: 76

BRIDGE 724,T-677

Fair

Over: OVER BIG RUN

COSSITT RD,WEST SALEM TWP, Mercer, PA

Built 1962 Load: 43.5 t ADT: 89

BRIDGE 2714,T-880

Fair

Over: OVER WOLF CREEK EAST BR.

HEMLOCK RD,WOLF CREEK TWP, Mercer, PA

Built 1961 Load: 43.5 t ADT: 6

SR 58, MERCER ROAD

Fair

Over: OVER LAWANGO RUN

DELAWARE TOWNSHIP, Mercer, PA

Built 1960 Load: 44.5 t ADT: 3,409

SR 80,WB

Fair

Over: OVER WOLF CREEK

WOLF CREEK TOWNSHIP, Mercer, PA

Built 1965 Load: 45.4 t ADT: 8,040

RAMP C. SR 80WB

Fair

Over: OVER HOGBACK RUN

SHENANGO TOWNSHIP, Mercer, PA

Built 1966 Load: 45.4 t ADT: 2,061

SR 62,S.MAIN ST.

Fair

Over: OVER SANDY CREEK TRIB

SANDY LAKE BOROUGH, Mercer, PA

Built 1932 Load: 46.3 t ADT: 4,636

SR 358,VERNON ROAD

Fair

Over: BIG RUN

WEST SALEM TOWNSHIP, Mercer, PA

Built 1931 Load: 46.3 t ADT: 1,971

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