Montgomery County, MD

522 public highway bridges

Montgomery County Bridge Snapshot

Montgomery County, Maryland contains 522 public highway bridges in the FHWA National Bridge Inventory. Roughly 33% are rated “Good,” 46.7% “Fair,” 4.6% “Poor,” and 4.6% 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 MD 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.

522

Total Bridges

33%

Good

4.6%

Poor

4.6%

Structurally Deficient

Condition Distribution

Good

33% (172)

Fair

46.7% (244)

Poor

4.6% (24)

SD

4.6% (24)

All Bridges (522)

Sort:

US 29

Over: PATUXENT RIVER

ON HOWARD CO LINE, Montgomery, MD

Built 1954 Load: 28.6 t ADT: 49,203

MD 119

Over: LONG DRAUGHT BRANCH

1.66 MILE NORTH OF MD 124, Montgomery, MD

Built 1990 Load: 29.0 t ADT: 10,766

BARNESVILLE ROAD

Over: LITTLE MONOCACY RIVER

0.6 MI E OF MT EPHRAIM RD, Montgomery, MD

Built 1940 Load: 29.0 t ADT: 918

PALMER ROAD SOUTH

Over: STONE LAKE RD/PARKING LT

600M E OF WOOD RD, Montgomery, MD

Built 1981 Load: 29.3 t ADT: 2,750

MD 97

Over: HAWLINGS RIVER

0.88 MILE SOUTH OF MD 650, Montgomery, MD

Built 1930 Load: 30.8 t ADT: 10,740

FAIRLAND ROAD

Over: PAINT BRANCH

1.5 MI WEST OF US 29, Montgomery, MD

Built 1965 Load: 31.7 t ADT: 17,033

E. RIXEY ROAD

Over: STONEY CREEK

10M W STONE LAKE RD, Montgomery, MD

Built 1975 Load: 32.7 t ADT: 500

MD 28 & RAMP 6

Over: WATTS BRANCH

0.18 MILE WEST OF IS 270, Montgomery, MD

Built 1955 Load: 32.7 t ADT: 47,601

US 29

Over: NORTHWEST BRANCH

0.27 M S OF LOCKWOOD DR, Montgomery, MD

Built 1920 Load: 32.7 t ADT: 67,927

MD 107

Over: DRY SENECA CREEK

1.4 MILES WEST OF MD 28, Montgomery, MD

Built 1992 Load: 32.7 t ADT: 5,862

MD 115

Over: ROCK CREEK

0.34 M E OF OLDE MILL RUN, Montgomery, MD

Built 1970 Load: 32.7 t ADT: 16,981

MD 124

Over: GREAT SENECA CREEK

0.23 MI S OF WATKINS RD, Montgomery, MD

Built 1989 Load: 32.7 t ADT: 11,881

MD 182

Over: BEL PRE CREEK

1.15 MILE NORTH OF MD 97, Montgomery, MD

Built 1991 Load: 32.7 t ADT: 21,002

MD 190

Over: BOOZE CREEK

0.56 MILE EAST OF IS 495, Montgomery, MD

Built 1962 Load: 32.7 t ADT: 44,290

MD 193

Over: SLIGO CREEK

1.26 MILES EAST OF MD 97, Montgomery, MD

Built 1932 Load: 32.7 t ADT: 28,580

MD 185

Over: BR OF ROCK CREEK

0.14 MILE SOUTH OF MD 586, Montgomery, MD

Built 1963 Load: 32.7 t ADT: 38,552

MD 124

Over: GOSHEN BRANCH

0.6 MI N OF BRINK RD, Montgomery, MD

Built 1989 Load: 32.7 t ADT: 11,560

MD 586

Over: TURKEY BRANCH

0.98 MILE WEST OF MD 185, Montgomery, MD

Built 1955 Load: 32.7 t ADT: 47,792

IS 495X

Over: BOOZE CREEK

0.48 MILE SOUTH OF IS 495, Montgomery, MD

Built 1964 Load: 32.7 t ADT: 19,820

MD 185

Over: TURKEY BRANCH

0.99 MILE SOUTH OF MD 97, Montgomery, MD

Built 1969 Load: 32.7 t ADT: 36,532

CLARA BARTON PKWY

Over: ROCK RUN

W OF INTERCHANGE, Montgomery, MD

Built 1963 Load: 32.7 t ADT: 13,090

MD 927 & RAMP 'D'

Over: IS 270 RAMP 'I'

0.13 M E OF BR NO 1506800, Montgomery, MD

Built 1988 Load: 32.7 t ADT: 57,252

HAVILAND MILL ROAD

Over: HAWLINGS RIVER

0.8 MI EAST OF MD 650, Montgomery, MD

Built 1926 Load: 32.7 t ADT: 1,000

RANNOCH ROAD

Over: MINNEHAHA BRANCH

0.05 MILES WEST OF MD 614, Montgomery, MD

Built 1920 Load: 32.7 t ADT: 897

BALTIMORE ROAD

Over: ROCK CREEK

0.5 MI S OF JCT SR 28, Montgomery, MD

Built 1911 Load: 32.7 t ADT: 7,482

STRINGTOWN ROAD

Over: TRIBUTARY TO LITTLE SENE

0.5 MI NE OF JCT SR 355, Montgomery, MD

Built 2017 Load: 32.7 t ADT: 7,151

WHITE GROUND ROAD

Over: TRIBUTARY OF SENECA CREE

.4 MI N OF MD 28, Montgomery, MD

Built 1925 Load: 32.7 t ADT: 615

BRIMSTONE ACADEMY

Over: TRIBUTARY TO JAMES CREEK

0.2 MI. S. OF MD 108, Montgomery, MD

Built 1988 Load: 32.7 t ADT: 539

LOGAN DRIVE

Over: ROCK RUN

1.0 MILE SOUTH OF MD-190, Montgomery, MD

Built 1972 Load: 32.7 t ADT: 1,657

BEACH DRIVE

Over: ROCK CREEK TRIBUTARY

0.81 MI N OF JCT SR 547, Montgomery, MD

Built 1965 Load: 32.7 t ADT: 8,611

LITTLE FALLS PARKW

Over: LITTLE FALLS BRANCH TRIB

0.3 MI SW OF RIVER RD, Montgomery, MD

Built 1980 Load: 32.7 t ADT: 16,691

TOWER OAKS BOULEVA

Over: CABIN JOHN CREEK

0.1 M N OF MONTROSE ROAD, Montgomery, MD

Built 1975 Load: 32.7 t ADT: 12,480

EDWARDS FERRY ROAD

Over: C&O CANAL

0.1 miles north of Potoma, Montgomery, MD

Built 1950 Load: 32.7 t ADT: 50

MD 650

Over: HAWLINGS RIVER

1.88 MILES N OF MD 108, Montgomery, MD

Built 1929 Load: 33.1 t ADT: 7,660

IS 495X

Over: CABIN JOHN CREEK

0.22 MILE NORTH OF GV 6, Montgomery, MD

Built 1964 Load: 33.1 t ADT: 19,820

BETHESDA CHURCH RO

Over: BENNETT CREEK

2.6 MILES SE OF MD 75, Montgomery, MD

Built 1990 Load: 33.6 t ADT: 4,242

MAPLE AVENUE

Over: SLIGO CREEK

0.5 MI N OF JCT SR 410, Montgomery, MD

Built 1930 Load: 33.6 t ADT: 6,024

KENSINGTON PARKWAY

Over: ROCK CREEK

0.2 MI S OF BEACH DRIVE, Montgomery, MD

Built 1910 Load: 33.7 t ADT: 3,633

MD 28

Over: LITTLE MONOCACY RIVER

1.86 MILES E OF FRED CO, Montgomery, MD

Built 1925 Load: 34.0 t ADT: 5,050

MD 410

Over: CSXT, WMATA

0.09 MILE EAST OF US 29, Montgomery, MD

Built 1975 Load: 34.5 t ADT: 14,001

MD 182

Over: BATCHELLOR'S RUN

0.391 MILE SOUTH OF MD 28, Montgomery, MD

Built 1931 Load: 34.9 t ADT: 9,850

IS 495

Over: NORTHWEST BRANCH

1.00 MILE WEST OF MD 650, Montgomery, MD

Built 1967 Load: 34.9 t ADT: 222,147

WATKINS MILL ROAD

Over: CABIN BRANCH

.4 MI S OF APPLE RIDGE RD, Montgomery, MD

Built 1990 Load: 34.9 t ADT: 12,768

FOREST GLEN ROAD

Over: SLIGO CREEK

0.6 MI EAST OF MD 97, Montgomery, MD

Built 1974 Load: 34.9 t ADT: 12,150

MD 410

Over: BRANCH OF ROCK CREEK

0.34 MILE WEST OF MD 390, Montgomery, MD

Built 1929 Load: 35.4 t ADT: 26,931

MD 547

Over: ROCK CREEK

0.66 MILE WEST OF MD 185, Montgomery, MD

Built 1932 Load: 35.4 t ADT: 10,982

WOODFIELD SCHOOL R

Over: GREAT SENECA CREEK

0.5 MILES NORTH OF MD 124, Montgomery, MD

Built 1974 Load: 35.8 t ADT: 160

LAKE POTOMAC DRIVE

Over: WATTS BRANCH

0.1 MI N OF JCT SR 190, Montgomery, MD

Built 1985 Load: 36.7 t ADT: 139

CLARA BARTON PARKW

Over: LITTLE FALLS BRANCH

4.5 MILES SOUTH OF I-495., Montgomery, MD

Built 1961 Load: 37.2 t ADT: 16,120

PALMER ROAD SOUTH

Over: E PALMER RD,STONEY CREEK

500M E OF WOOD RD, Montgomery, MD

Built 1981 Load: 37.3 t ADT: 2,750

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

Reviewed byPlainbridges Editorial, Plain Bridges Editorial Team · June 5, 2026