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:

IS 495 RAMP E(10)

Over: CABIN JOHN CREEK

0.12 MI W OF IS 495X, Montgomery, MD

Built 1964 Load: 65.3 t ADT: 11,731

WARING STATION ROA

Over: CSXT RAILROAD

0.5 MI NORTH OF MD 117, Montgomery, MD

Built 1986 Load: 65.3 t ADT: 6,897

WHITES FERRY ROAD

Over: BROAD RUN

3 MILES WEST OF MD 109, Montgomery, MD

Built 1931 Load: 65.3 t ADT: 1,988

MD 190

Over: MUDDY BRANCH

0.98 M E OF PETTIT WAY, Montgomery, MD

Built 1954 Load: 66.2 t ADT: 3,592

RANDOLPH ROAD (WB)

Over: ROCK CREEK

0.6 MILES WEST OF MD 586, Montgomery, MD

Built 1951 Load: 66.2 t ADT: 23,434

MD 117

Over: BUCKLODGE BRANCH

3.12 MILES NORTH OF MD 28, Montgomery, MD

Built 1932 Load: 67.1 t ADT: 5,572

MD 118

Over: GREAT SENECA CREEK

1.3 MILES NORTH OF MD 28, Montgomery, MD

Built 1931 Load: 67.1 t ADT: 6,121

NICHOLSON LANE

Over: CSXT RAILROAD

0.5 MILES EAST OF MD 355, Montgomery, MD

Built 2008 Load: 67.1 t ADT: 38,971

DENNIS AVENUE

Over: SLIGO CREEK

0.7 MI E OF JCT SR 97, Montgomery, MD

Built 1999 Load: 67.1 t ADT: 10,971

BEACH DRIVE

Over: ROCK CREEK

0.15 MI N OF JCT SR 547, Montgomery, MD

Built 1966 Load: 67.1 t ADT: 8,663

TUCKERMAN LANE

Over: CABIN JOHN CREEK

1 MI E OF SEVEN LOCKS RD, Montgomery, MD

Built 1966 Load: 68.0 t ADT: 24,539

SEVEN LOCKS ROAD

Over: CABIN JOHN CREEK

.1 MI S OF DEMOCRACY BLVD, Montgomery, MD

Built 1960 Load: 71.2 t ADT: 30,260

MIDDLEBRIDGE DRIVE

Over: BEL PRE CREEK

0.1 MI EAST OF MD-182, Montgomery, MD

Built 1983 Load: 71.2 t ADT: 315

MORNINGWOOD DRIVE

Over: WILLIAMSBURG RUN TRIB

0.90 MI. W. OF MD 108, Montgomery, MD

Built 1970 Load: 72.6 t ADT: 5,113

GOSHEN ROAD

Over: WHETSTONE RUN

0.1 MI S MID-COUNTY HWY, Montgomery, MD

Built 1986 Load: 73.0 t ADT: 20,972

NELSON STREET

Over: WATTS BRANCH

0.5 MILES NORTH OF MD 28, Montgomery, MD

Built 1955 Load: 73.0 t ADT: 13,576

MD 586

Over: ROCK CREEK

1.68 MILES EAST OF MD 28, Montgomery, MD

Built 1954 Load: 73.5 t ADT: 56,222

PRESERVE PARKWAY

Over: CABIN JOHN CREEK

0.2 MI E OF TOWER OAKS BL, Montgomery, MD

Built 2006 Load: 73.9 t ADT: 2,450

BEACH DRIVE

Over: TRIB TO ROCK CREEK

1.1 MI SOUTH OF MD 547, Montgomery, MD

Built 1968 Load: 75.7 t ADT: 6,263

SHADY GROVE RD WB

Over: CSXT RAILROAD

0.5 MI EAST OF MD 355, Montgomery, MD

Built 1976 Load: 76.6 t ADT: 35,374

MD 117

Over: GUNNERS BRANCH

1.21 MILES EAST OF MD 118, Montgomery, MD

Built 1951 Load: 78.9 t ADT: 18,752

BIG WOODS ROAD

Over: LITTLE MONOCACY RIVER

0.6 MI S OF JCT SR 28, Montgomery, MD

Built 1919 Load: 81.2 t ADT: 345

BEL PRE ROAD

Over: BEL PRE CREEK

0.5 MILES WEST OF MD 182, Montgomery, MD

Built 1955 Load: 83.0 t ADT: 31,186

BRIGHTON DAM ROAD

Over: HAWLINGS RIVER

0.9 MI W OF JCT SR MD 650, Montgomery, MD

Built 1920 Load: 83.0 t ADT: 2,990

DEMOCRACY BLVD

Over: BUCK BRANCH

2 MI E OF JCT SR MD 189, Montgomery, MD

Built 1988 Load: 83.0 t ADT: 16,780

SKYLARK ROAD

Over: LITTLE SENECA CREEK

0.7 MI WEST OF MD 27, Montgomery, MD

Built 2006 Load: 84.4 t ADT: 5,507

HUNTMASTER ROAD

Over: GOSHEN BRANCH

0.2 MI NORTH OF BRINK RD, Montgomery, MD

Built 1920 Load: 85.4 t ADT: 480

MD 355

Over: CAPITAL CRESCENT TRAIL

0.08 MILE SOUTH OF MD 410, Montgomery, MD

Built 1988 Load: 85.7 t ADT: 28,620

GLEN ROAD

Over: WATTS BRANCH

1.5 MI W OF JCT SR 189, Montgomery, MD

Built 1930 Load: 85.7 t ADT: 8,250

GRANITE ROCK ROAD

Over: TRIBUTARY TO LITTLE SENE

1 MI NORTHEAST OF MD 355, Montgomery, MD

Built 2007 Load: 96.9 t ADT: 412

MD 108

Over: PATUXENT RIVER

ON HOWARD CO LINE, Montgomery, MD

Built 1928 Load: 99.9 t ADT: 12,871

IS 270

Over: LITTLE SENECA CREEK

1.85 south of MD 121, Montgomery, MD

Built 1954 Load: 99.9 t ADT: 98,097

IS 270

Over: OLD FARM CREEK

0.13 MILE N OF IS 270Y, Montgomery, MD

Built 1958 Load: 99.9 t ADT: 265,320

MD 117

Over: LITTLE SENECA CREEK

1.03 MILES EAST OF MD 121, Montgomery, MD

Built 1953 Load: 99.9 t ADT: 7,457

MD 190

Over: WATTS BRANCH

3.42 MILES WEST OF MD 189, Montgomery, MD

Built 1949 Load: 99.9 t ADT: 15,240

IS 495

Over: SLIGO CREEK

0.55 MILE EAST OF MD 97, Montgomery, MD

Built 1960 Load: 99.9 t ADT: 232,010

IS 495

Over: BR OF ROCK CREEK

0.6 MILE EAST OF MD 355, Montgomery, MD

Built 1958 Load: 99.9 t ADT: 238,050

MD 28

Over: BRANCH OF ROCK CREEK

0.55 MILE EAST OF MD 911, Montgomery, MD

Built 1969 Load: 99.9 t ADT: 34,390

MD 586

Over: BRANCH OF ROCK CREEK

0.06 M E OF ANDREW STREET, Montgomery, MD

Built 1956 Load: 99.9 t ADT: 37,752

MD 124

Over: WHETSTONE RUN

0.447 M S of Midcounty, Montgomery, MD

Built 1986 Load: 99.9 t ADT: 23,621

MUDDY BRANCH ROAD

Over: MUDDY BRANCH

1 MI N GREAT SENECA HWY, Montgomery, MD

Built 1987 Load: 99.9 t ADT: 24,785

MUDDY BRANCH ROAD

Over: SHADY BRANCH

0.5 MILES NORTH OF MD 28, Montgomery, MD

Built 1987 Load: 99.9 t ADT: 24,739

BRIGGS CHANEY ROAD

Over: PAINT BRANCH

2.4 MILES EAST OF MD 650, Montgomery, MD

Built 1974 Load: 99.9 t ADT: 20,551

BRIGGS CHANEY ROAD

Over: LITTLE PAINT BRANCH TRIB

1 MI EAST OF US 29, Montgomery, MD

Built 1994 Load: 99.9 t ADT: 12,450

HOWARD CHAPEL ROAD

Over: HAIGHTS BRANCH

1.7 MI NORTH OF MD 650, Montgomery, MD

Built 1963 Load: 99.9 t ADT: 580

HAWKINS CREAMERY R

Over: GREAT SENECA CREEK

1.3 MILES WEST OF MD 108, Montgomery, MD

Built 1961 Load: 99.9 t ADT: 550

DEMOCRACY BOULEVAR

Over: CABIN JOHN CREEK

.1 MI E OF SEVEN LOCKS RD, Montgomery, MD

Built 1967 Load: 99.9 t ADT: 31,775

TILDEN LANE

Over: OLD FARM CREEK

1.2 MILES WEST OF MD 187, Montgomery, MD

Built 1972 Load: 99.9 t ADT: 6,533

JONES MILL ROAD

Over: COQUELIN RUN

0.5 MILES NORTH OF MD 410, Montgomery, MD

Built 1949 Load: 99.9 t ADT: 7,542

MONTGOMERY VILLAGE

Over: CABIN BRANCH

2.2 MI N OF JCT SR MD 355, Montgomery, MD

Built 1972 Load: 99.9 t ADT: 31,900

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 6, 2026