St. Mary's County, MD

50 public highway bridges

St. Mary's County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, St. Mary's County, Maryland contains 50 public highway bridges. Roughly 26% are rated “Good,” 70% “Fair,” and 4% “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.

50

Total Bridges

26%

Good

70%

Fair

4%

Poor Condition

Condition Distribution

Good

26% (13)

Fair

70% (35)

Poor

4% (2)

All Bridges (50)

Sort:

CEDAR POINT RD

Over: HARPERS CREEK

0.7 MI N OF BRONSON RD, St. Mary's, MD

Built 1952 Load: 20.9 t ADT: 1,440

CEDAR POINT RD

Over: GOOSE CREEK

0.9 MI NE OF MACAULAY AVE, St. Mary's, MD

Built 1952 Load: 20.9 t ADT: 1,440

MD 5

Over: MOLL DYERS RUN

1.26 MILES S OF MD 244, St. Mary's, MD

Built 1937 Load: 27.7 t ADT: 12,500

MD 249

Over: ST GEORGES CREEK

0.46 MILE S OF STARK DR, St. Mary's, MD

Built 1957 Load: 28.1 t ADT: 1,530

MD 242

Over: TOMAKOKIN CREEK

0.71 MILE NORTH OF MD 238, St. Mary's, MD

Built 1936 Load: 29.9 t ADT: 5,491

MD 5

Over: MCINTOSH RUN

0.14 MILE SOUTH OF MD 243, St. Mary's, MD

Built 1935 Load: 31.3 t ADT: 22,220

MD 238

Over: NELSONS RUN

0.28 MILE SOUTH OF MD 234, St. Mary's, MD

Built 1929 Load: 32.7 t ADT: 1,791

MD 234

Over: NELSON RUN

0.43 MILE WEST OF MD 5, St. Mary's, MD

Built 1950 Load: 32.7 t ADT: 9,701

MD 242

Over: BR OF ST CLEMENTS CREEK

0.58 MILE SOUTH OF MD 5, St. Mary's, MD

Built 1951 Load: 33.1 t ADT: 2,431

MD 5

Over: ST MARYS RIVER

0.10 MILE NORTH OF MD 246, St. Mary's, MD

Built 1955 Load: 33.6 t ADT: 22,642

MD 5

Over: GLEBE RUN

0.11 MILE SOUTH OF MD 4, St. Mary's, MD

Built 1955 Load: 34.5 t ADT: 12,500

MD 5

Over: CHURCH CREEK

2.4 MILES SOUTH OF MD 584, St. Mary's, MD

Built 1936 Load: 34.5 t ADT: 4,400

MD 5

Over: FISHERMAN CREEK

0.31 MILE NORTH OF MD 584, St. Mary's, MD

Built 1936 Load: 35.4 t ADT: 7,244

MD 245

Over: BROOKS RUN

1.71 MILES S OF MD 235, St. Mary's, MD

Built 1950 Load: 35.4 t ADT: 8,324

PEGG ROAD

Over: BRANCH JARBOESVILLE RUN

.8 MI CHANCELLORS RUN RD, St. Mary's, MD

Built 1990 Load: 38.1 t ADT: 9,574

MD 471

Over: ST MARYS RIVER

0.36 MILE NORTH OF MD 5, St. Mary's, MD

Built 1932 Load: 39.0 t ADT: 4,242

DELABROOKE ROAD

Over: HORSE LANDING CREEK

2 MI E OF MD RTE 6, St. Mary's, MD

Built 1971 Load: 39.0 t ADT: 200

MD 234

Over: CHAPTICO CREEK

0.22 MILE WEST OF MD 238, St. Mary's, MD

Built 1959 Load: 39.5 t ADT: 8,121

MD 4

Over: KINGSTON CREEK

2.07 MILES N OF MD 235, St. Mary's, MD

Built 1980 Load: 43.1 t ADT: 26,801

MD 6

Over: LOCKS SWAMP CREEK

0.1 M W OF LAUREL VIEW LN, St. Mary's, MD

Built 1930 Load: 44.0 t ADT: 1,951

FENWICK STREET

Over: TOWN RUN

0.3 MILE NORTH OF MD 5, St. Mary's, MD

Built 1955 Load: 49.0 t ADT: 7,918

MD 244

Over: POPLAR HILL CREEK

0.16 M W OF TOWER HILL RD, St. Mary's, MD

Built 1938 Load: 53.5 t ADT: 2,517

MD 237

Over: JARBOESVILLE RUN

0.53 MILE NORTH OF MD 246, St. Mary's, MD

Built 2009 Load: 53.5 t ADT: 17,352

MD 238

Over: BURROUGHS RUN

1.49 MILES W OF MD 234, St. Mary's, MD

Built 1929 Load: 60.8 t ADT: 1,791

PEGG ROAD

Over: BRANCH JARBOESVILLE RUN

0.9 MI SOUTHWEST RT.235, St. Mary's, MD

Built 1995 Load: 62.6 t ADT: 4,891

MD 242

Over: LOCUST RUN

1.62 MILES SOUTH OF MD 5, St. Mary's, MD

Built 1929 Load: 76.2 t ADT: 2,371

MD 5

Over: EASTERN BRANCH

1.47 MILES N OF MD 489, St. Mary's, MD

Built 2016 Load: 82.3 t ADT: 10,000

MD 5

Over: ST CLEMENTS CREEK

0.72 MILE SOUTH OF MD 238, St. Mary's, MD

Built 1929 Load: 89.3 t ADT: 6,450

MD 4

Over: ST MARY'S RIVER

1.1 MILES SOUTH OF MD 235, St. Mary's, MD

Built 1974 Load: 99.9 t ADT: 18,051

MD 5

Over: TOWN RUN

0.36 MILE SOUTH OF MD 245, St. Mary's, MD

Built 1990 Load: 99.9 t ADT: 21,360

HURRY RD

Over: NELSONS RUN

0.2 MI S OF MD RTE 238, St. Mary's, MD

Built 2008 Load: 99.9 t ADT: 1,427

STONEY RUN DRIVE

Over: WAREHOUSE RUN

1 MI W OF FLAT IRON ROAD, St. Mary's, MD

Built 1995 Load: 99.9 t ADT: 478

WILDEWOOD PARKWAY

Over: UNNAMED STREAM

.9 MI W OF WILDEWOOD BLVD, St. Mary's, MD

Built 1995 Load: 99.9 t ADT: 5,900

GREENS CROSSING CO

Over: CRANEY CREEK

0.6 MI E. OF FLAT IRON RD, St. Mary's, MD

Built 2009 Load: 99.9 t ADT: 603

WILDEWOOD DR.

Over: UNNAMED TRIBUTARY

0.2 M S OF WILDEWOOD PKWY, St. Mary's, MD

Built 2010 Load: 99.9 t ADT: 1,024

DOCTOR JOHNSON ROA

Over: ST. CLEMENTS CREEK

0.9 MI W OF MD RTE 242, St. Mary's, MD

Built 1975 Load: 26.3 t ADT: 880

MD 234

Over: BUDDS CREEK

ON CHARLES CO LINE, St. Mary's, MD

Built 1960 Load: 32.7 t ADT: 6,221

MD 242

Over: DYNARD RUN

0.86 MILE SOUTH OF MD 234, St. Mary's, MD

Built 1960 Load: 32.7 t ADT: 5,491

MD 471

Over: ST. MARY'S RIVER

1.01 MILES NORTH OF MD 5, St. Mary's, MD

Built 1990 Load: 32.7 t ADT: 4,242

MD 242

Over: ST CLEMENTS CREEK

0.52 MILE NORTH OF MD 234, St. Mary's, MD

Built 2000 Load: 36.7 t ADT: 2,371

MCINTOSH ROAD

Over: MCINTOSH RUN

0.9 MI N OF MD RTE 245, St. Mary's, MD

Built 1984 Load: 43.5 t ADT: 2,500

MECHANICSVILLE RD

Over: CHAPTICO CREEK

0.7 MI N OF MD RTE 234, St. Mary's, MD

Built 2011 Load: 44.4 t ADT: 2,876

MD 234

Over: ST CLEMENTS CREEK

0.28 MILE EAST OF MD 242, St. Mary's, MD

Built 1950 Load: 54.9 t ADT: 9,701

MD 244

Over: MOLL DYERS RUN

1.21 MILES WEST OF MD 5, St. Mary's, MD

Built 1925 Load: 63.0 t ADT: 2,190

BEN OAKS DRIVE

Over: PERSIMMON CREEK

0.4 M NE OF MD 235, St. Mary's, MD

Built 2009 Load: 74.4 t ADT: 978

MD 470

Over: TOMAKOKIN CREEK

0.88 MILE SOUTH OF MD 242, St. Mary's, MD

Built 1997 Load: 81.6 t ADT: 1,162

MD 6

Over: PERSIMMON CREEK

2.44 MILES W OF MD 235, St. Mary's, MD

Built 2021 Load: 88.5 t ADT: 4,200

MD 5

Over: BRANCH OF MCINTOSH RUN

.652 MILE SOUTH OF MD 243, St. Mary's, MD

Built 2017 Load: 99.9 t ADT: 22,220

CORNFIELD HARBOR D

Over: POINT LOOKOUT CREEK

1 Mile South of SR 5, St. Mary's, MD

Built 1970 Load: 15.0 t ADT: 150

MD 5

Over: HILTON RUN

1.86 MILES N OF MD 489, St. Mary's, MD

Built 1936 Load: 33.1 t ADT: 8,010

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

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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.