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Historic Bridges in Maryland

968 bridges built before 1951 in Maryland still in service today.

Bridges Built Before 1951

The United States has 968 bridges in Maryland built before 1951 that remain in active service. These structures are 75+ years old — many predate modern engineering codes and were not designed for today's traffic volumes and vehicle weights. The average design life of a bridge is 50 years, making these aging structures a significant infrastructure concern.

Clear
Bridge State Condition Year Built Age (Years) ADT
Little Patuxent River Maryland Fair 1939 87 50,111
NORTHWEST BRANCH Maryland Fair 1939 87 40,653
UNICORN BRANCH Maryland Fair 1939 87 2,461
BACHELORS BRANCH Maryland Fair 1939 87 5,662
CAMPBELL DITCH Maryland Fair 1939 87 114
SUSQUEHANNA RIVER-PA RR Maryland Fair 1939 87 25,780
BRANCH OF LITTLE PATUXEN Maryland Fair 1940 86 25,492
PRINCIPIO CREEK Maryland Fair 1940 86 25,400
STONY RUN Maryland Fair 1940 86 21,540
TONOLOWAY CREEK Maryland Fair 1940 86 8,201
GEORGES CREEK Maryland Good 1940 86 432
JENNINGS RUN Maryland Fair 1940 86 286
FIFTEEN MILE CREEK Maryland Fair 1940 86 107
ELK LICK RUN Maryland Poor 1940 86 1,075
JACKSON RUN Maryland Good 1940 86 337
DELAWARE RUN Maryland Fair 1940 86 900
HERRING RUN Maryland Fair 1940 86 47,118
CSX RAILROAD Maryland Fair 1940 86 857
ROCK RUN CREEK Maryland Poor 1940 86 918
ROCK RUN Maryland Poor 1940 86 100
ALLOWAY CREEK Maryland Fair 1940 86 269
BIG PIPE CREEK Maryland Fair 1940 86 180
SOUTH BRANCH GUNPOWDER F Maryland Fair 1940 86 88
CSX RAILROAD Maryland Poor 1940 86 10,242
LITTLE PATUXENT RIVER Maryland Fair 1940 86 4,932
LITTLE MONOCACY RIVER Maryland Fair 1940 86 918
SILVER CREEK Maryland Fair 1940 86 4,601
SILVER CREEK Maryland Fair 1940 86 3,460
LANES RUN Maryland Good 1940 86 295
DOG CREEK Maryland Poor 1940 86 1,408
ISRAEL CREEK Maryland Poor 1940 86 687
MEETINGHOUSE BRANCH Maryland Good 1940 86 50
MIDWAY BRANCH Maryland Fair 1940 86 120
CSX TRANSPORTATION Maryland Fair 1941 85 13,380
US 40 Maryland Fair 1941 85 8,661
HOG CREEK Maryland Fair 1941 85 2,672
MILL CREEK Maryland Fair 1941 85 22,280
CSX TRANS. Maryland Fair 1941 85 22,632
LITTLE CATOCTIN CREEK Maryland Fair 1941 85 2,782
OXON RUN Maryland Fair 1941 85 9,011
BEAVERDAM CREEK Maryland Fair 1941 85 33,580
PEACHBLOSSOM CREEK Maryland Fair 1941 85 31,091
HAMILTON RUN Maryland Fair 1941 85 35,842
ANTIETAM CREEK Maryland Fair 1941 85 9,902
GWYNNS FALLS Maryland Fair 1941 85 16,775
HUNTING CREEK Maryland Poor 1941 85 —
MD 700 Maryland Fair 1942 84 35,131
MD 150 Maryland Fair 1942 84 23,941
MD 150 Maryland Fair 1942 84 23,941
AMTRAK Maryland Fair 1942 84 499

About Historic Bridge Data

Bridges built before 1951 are classified as historic in this database. Many were designed to 1940s standards with lower load limits and narrower lanes. While FHWA requires regular inspections of all bridges regardless of age, older structures often require more frequent monitoring and rehabilitation investment.

All Bridges Poor Condition Scour Critical Bridge Stats