Frederick County, MD

491 public highway bridges

Frederick County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Frederick County, Maryland contains 491 public highway bridges. Roughly 38.9% are rated “Good,” 40.3% “Fair,” and 2.6% “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.

491

Total Bridges

38.9%

Good

40.3%

Fair

2.6%

Poor Condition

Condition Distribution

Good

38.9% (191)

Fair

40.3% (198)

Poor

2.6% (13)

All Bridges (491)

Sort:

IS 70 WBR

Over: MT TABOR ROAD

1.17 MILES W OF MD 17, Frederick, MD

Built 1968 ADT: 568

MD 17

Over: IS 70

1.15 M E OF MT TABOR ROAD, Frederick, MD

Built 1968 ADT: 68,230

IS 70 WBR

Over: IS 270

0.09 M N OF BR NO 1010300, Frederick, MD

Built 1968 ADT: 109,670

IS 70 WBR

Over: US 40 EBR(RAMP 5)

0.5 MILE EAST OF MD 180, Frederick, MD

Built 2002 ADT: 18,542

ELMER DERR ROAD

Over: US 15

0.46 MILE SOUTH OF US 340, Frederick, MD

Built 1969 ADT: 16,060

IS 70 RAMPS A & E

Over: MD 180

0.27 MILE EAST OF US 15, Frederick, MD

Built 1968 ADT: 25,990

IS 70 EBR

Over: US 15

0.24 MILE WEST OF MD 180, Frederick, MD

Built 1968 ADT: 26,810

IS 70 WBR

Over: US 15

0.24 MILE WEST OF MD 180, Frederick, MD

Built 1968 ADT: 26,810

IS 70 EBR

Over: IS 70 RAMP 'A'

0.28 MI E OF MD 180, Frederick, MD

Built 1968 ADT: 8,557

IS 70 WBR

Over: RAMP 'A'

0.28 MI E OF MD 180, Frederick, MD

Built 1968 ADT: 8,557

IS 70 RAMPS A & E

Over: US 15/US 340

0.09 MILE NORTH OF IS 70, Frederick, MD

Built 1968 ADT: 26,810

MD 180

Over: IS 70

0.37 MILE WESY OF US 15, Frederick, MD

Built 1968 ADT: 74,920

IS 70 EBR

Over: IS 70 RAMP 'E'

0.29 MI W OF US 40 AL, Frederick, MD

Built 1969 ADT: 4,781

IS 70 WBR

Over: IS 70 RAMP 'E'

0.29 MI W OF US 40 AL, Frederick, MD

Built 1969 ADT: 4,781

US 40 EBR

Over: IS 70 RAMP 'F' (02)

0.87 MI W OF FREDERICK, Frederick, MD

Built 1969 ADT: 3,593

MD 180

Over: US 15

0.48 MI E OF IS 70, Frederick, MD

Built 1968 ADT: 44,760

MT ZION ROAD

Over: US 15

1.88 MILE NORTH OF US 340, Frederick, MD

Built 1968 ADT: 51,930

MD 140

Over: US 15

0.1 MILE NORTH OF MD 904F, Frederick, MD

Built 1971 ADT: 17,010

US 15 NBR

Over: MD 550

0.8 MILE SOUTH OF MD 77, Frederick, MD

Built 1972 ADT: 7,221

RIDGE ROAD

Over: IS 70

1.87 MI W OF US 40AL, Frederick, MD

Built 1972 ADT: 68,230

MD 75

Over: IS 70

0.07 M E OF BR NO 1017500, Frederick, MD

Built 1973 ADT: 69,020

MUSSETTER ROAD

Over: IS 70

2.1 MILE WEST OF MD 75, Frederick, MD

Built 1973 ADT: 67,980

BARTHOLOWS ROAD

Over: IS 70,CSX TRANSPORTATION

2.27 MILE EAST OF MD 75, Frederick, MD

Built 1974 ADT: 69,020

IS 70 EBR

Over: BILL MOXELY ROAD

1.75 MI W OF CARROLL CO, Frederick, MD

IS 70 WBR

Over: BILL MOXLEY ROAD

1.75 MI W OF CARROLL CO, Frederick, MD

US 15 SBR

Over: MD 550

0.37 MI N OF MD 15D, Frederick, MD

Built 1982 ADT: 7,221

US 15 NBR

Over: MD 77, HUNTING CREEK

0.03 M E OF MOUNTAIN ROAD, Frederick, MD

Built 1985 ADT: 8,551

US 15 NBR

Over: MD 15C

0.76 MI S OF MD 77, Frederick, MD

Built 1985 ADT: 999

US 15 SBR

Over: MD 15C

0.76 MI S OF MD 77, Frederick, MD

Built 1985 ADT: 999

PEDESTRIAN

Over: US 15

0.913 M N OF MD 806A, Frederick, MD

Built 1983 ADT: 30,800

LINGANORE ROAD

Over: IS 70

1.48 M W OF QUINN ROAD, Frederick, MD

Built 1985 ADT: 59,922

IS 70 EBR

Over: SPRING RIDGE PKWY

2.38 MI E OF FREDERICK, Frederick, MD

IS 70 WBR

Over: SPRING RIDGE PKWY

2.38 MI E OF FREDERICK, Frederick, MD

QUINN ROAD

Over: IS 70

1.48 M E OF LINGANORE RD, Frederick, MD

Built 1985 ADT: 59,922

IS 70 EBR

Over: OLD NATIONAL PIKE

3.93 MI W OF MD 75, Frederick, MD

Built 1985 ADT: 8,831

IS 70 WBR

Over: OLD NATIONAL PIKE

3.93 MI W OF MD 75, Frederick, MD

Built 1985 ADT: 8,831

IS 70 RAMP 'B'

Over: MD 180

0.14 MILE WEST OF MD 351, Frederick, MD

Built 1996 ADT: 25,990

IS 70 RAMP '7'

Over: US 40 RAMP '5'

0.34 MILE EAST OF US 15, Frederick, MD

Built 2002 ADT: 18,542

MD 85

Over: IS 70

AT IS 70, Frederick, MD

Built 2009 ADT: 82,042

BLACKS MILL ROAD

Over: BIG HUNTING CREEK

WEST OF LAYMAN RD INT, Frederick, MD

Built 1914 Load: 10.4 t ADT: 450

BENNIES HILL ROAD

Over: CATOCTIN CREEK

0.65 MI EAST OF MD 17, Frederick, MD

Built 1880 Load: 13.2 t ADT: 131

KEYSVILLE ROAD

Over: TOMS CREEK

2.0 MI NORTHEAST OF MD 76, Frederick, MD

Built 1876 Load: 13.6 t ADT: 451

MD 550

Over: CABBAGE RUN

1.39 MILES NORTH OF MD 26, Frederick, MD

Built 1939 Load: 14.5 t ADT: 2,785

STEVENS ROAD

Over: HUNTING CREEK

WEST OF OLD FREDERICK RD, Frederick, MD

Built 1914 Load: 14.5 t ADT: 135

HOLTER ROAD

Over: HOLLOW CREEK

1 MILE SOUTHEAST OF MD 17, Frederick, MD

Built 1920 Load: 15.4 t ADT: 3,333

MAINTENANCE ROAD

Over: BLUE BLAZES CREEK

US-15N, WEST ON MC-77 TO, Frederick, MD

Built 1960 Load: 15.4 t ADT: 50

CROW ROCK ROAD

Over: MIDDLE CREEK

AT MD 17 INTERSECTION, Frederick, MD

Built 1897 Load: 16.3 t ADT: 460

SUMANTOWN ROAD

Over: CATOCTIN CREEK

1.5 MI W OLD MIDDLETOWN R, Frederick, MD

Built 1900 Load: 16.3 t ADT: 124

STATION ROAD

Over: CATOCTIN CREEK

0.5 MI W OF OLD HAGERSTOW, Frederick, MD

Built 1920 Load: 16.8 t ADT: 133

OLD MILL ROAD

Over: OWENS CREEK

0.87 MILES SOUTH OF MD 77, Frederick, MD

Built 1882 Load: 17.2 t ADT: 360

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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