Howard County, MD

310 public highway bridges

Howard County Bridge Snapshot

Howard County, Maryland contains 310 public highway bridges in the FHWA National Bridge Inventory. Roughly 28.4% are rated “Good,” 37.1% “Fair,” 5.8% “Poor,” and 5.8% 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.

310

Total Bridges

28.4%

Good

5.8%

Poor

5.8%

Structurally Deficient

Condition Distribution

Good

28.4% (88)

Fair

37.1% (115)

Poor

5.8% (18)

SD

5.8% (18)

All Bridges (310)

Sort:

IS 70 EB

Over: TRANS CONT PIPE LINE

0.35 MILE EAST OF US 40, Howard, MD

Built 1968 Load: 50.8 t ADT: 67,990

MAYFIELD AVENUE

Over: DEEP RUN

0.2 MI W OF MD RTE 103, Howard, MD

Built 1945 Load: 52.2 t ADT: 5,788

WATERSVILLE ROAD

Over: HAY MEADOW BRANCH

1 MI N OLD FREDERICK RD, Howard, MD

Built 1935 Load: 53.1 t ADT: 539

IS 70 WB

Over: TRANS CONT PIPE LINE

0.35 MILE EAST OF US 40, Howard, MD

Built 1968 Load: 53.5 t ADT: 67,990

US 40

Over: Little Patuxent River

0.49 M W OF DOGWOOD DRIVE, Howard, MD

Built 1939 Load: 54.0 t ADT: 50,111

MD 175

Over: CSX RR

ON ANNE ARUNDEL CO LINE, Howard, MD

Built 1942 Load: 54.4 t ADT: 19,272

DORSEY RUN ROAD

Over: DORSEY RUN

0.5 MI S OF MD RTE 175, Howard, MD

Built 1955 Load: 57.1 t ADT: 6,745

MD 175 NB

Over: CO RTES 2035 & 2036

0.5 MILE NORTH OF MD 108, Howard, MD

Built 1975 Load: 59.0 t ADT: 30,855

MD 175 SB

Over: CO RTES 2035 & 2036

0.5 MILE NORTH OF MD 108, Howard, MD

Built 1975 Load: 59.4 t ADT: 34,795

US 1

Over: CSX TRANS.

0.85 MILE NORTH OF MD 32, Howard, MD

Built 1969 Load: 59.9 t ADT: 21,992

CRADLEROCK WAY

Over: UNNAMED STREAM

0.4 MI E BROKENLAND PKWY, Howard, MD

Built 1972 Load: 59.9 t ADT: 8,471

MD 108 EB

Over: LITTLE PATUXENT RIVER

0.55 MILE WEST OF US 29, Howard, MD

Built 1975 Load: 60.3 t ADT: 36,160

MD 108 WB

Over: LITTLE PATUXENT RIVER

0.55 MILE WEST OF US 29, Howard, MD

Built 1975 Load: 60.3 t ADT: 36,160

FOLLY QUARTER ROAD

Over: TRIBUTARY TO MIDDLE PATU

1.2 MI S OF MD RTE 144, Howard, MD

Built 1970 Load: 60.3 t ADT: 3,489

ATHOL AVENUE

Over: UNNAMED STREAM

0.3 MI E OF LOUDON AVE, Howard, MD

Built 1945 Load: 62.1 t ADT: 680

LAKESIDE DRIVE

Over: TRIB. TO PATUXENT RIVER

0.2 MI W OF NICHOLS DRIV, Howard, MD

Built 1988 Load: 63.5 t ADT: 340

OLD ANNAPOLIS ROAD

Over: LITTLE PATUXENT RIVER

0.04 MI W CO 76 & MD 108, Howard, MD

Built 1987 Load: 65.3 t ADT: 7,285

MULLINIX MILL ROAD

Over: PATUXENT RIVER

1.2 MI W OF MD 94, Howard, MD

Built 1991 Load: 67.1 t ADT: 383

IS 95 NB

Over: STANSFIELD RD

0.50 MI N OF PG CO, Howard, MD

Built 1970 Load: 67.6 t ADT: 186,040

MD 144A

Over: BR OF MIDDLE PATUXENT RI

1.5 MILES WEST OF US 32, Howard, MD

Built 1982 Load: 68.9 t ADT: 3,451

MD 32 WB

Over: LITTLE PATUXENT RIVER

0.23 M S OF SHAKER DRIVE, Howard, MD

Built 1981 Load: 70.7 t ADT: 81,712

US 29

Over: HAMMOND BRANCH

0.73 MILE NORTH OF MD 216, Howard, MD

Built 1951 Load: 72.6 t ADT: 69,132

LOUDON AVENUE

Over: UNNAMED STREAM

1.5 MI EAST OF RTE 1, Howard, MD

Built 2004 Load: 79.4 t ADT: 540

RIDINGS WAY

Over: UNNAMED STREAM

0.4 Mile West of MD 1, Howard, MD

Built 1996 Load: 79.4 t ADT: 100

US 1

Over: DEEP RUN

0.56 MILE NORTH OF MD 175, Howard, MD

Built 1929 Load: 99.9 t ADT: 29,180

US 1 SB

Over: LITTLE PATUXENT RIVER

0.38 MILE SOUTH OF MD 32, Howard, MD

Built 1900 Load: 99.9 t ADT: 20,330

MD 32

Over: BR OF PATAPSCO RIVER

0.49 MILE S OF MD 851F, Howard, MD

Built 1958 Load: 99.9 t ADT: 23,612

US 1 NBR

Over: RACE TRACK RD

0.06 MI N OF PG CO LINE, Howard, MD

Built 1949 Load: 99.9 t ADT: 16,190

IS 95 & RAMPS 2 &

Over: HAMMOND BRANCH

0.38 MILE NORTH OD MD 216, Howard, MD

Built 1968 Load: 99.9 t ADT: 192,401

IS 70 RAMP 6

Over: TERRAPIN BRANCH

0.06 MILE WEST OF MD 32, Howard, MD

Built 1972 Load: 99.9 t ADT: 5,972

MD 99

Over: DAVIS BRANCH

0.4 M E OF TAYLOR FARM RD, Howard, MD

Built 1986 Load: 99.9 t ADT: 5,971

MD 108

Over: CRICKET CREEK

0.85 MILE WEST OF MD 32, Howard, MD

Built 1912 Load: 99.9 t ADT: 12,830

MD 32

Over: BR OF TERRAPIN BRANCH

0.10 MILE SOUTH OF IS 70, Howard, MD

Built 1958 Load: 99.9 t ADT: 22,492

MD 100

Over: BR OF DEEP RUN

0.83 MILE EAST OF MD 104, Howard, MD

Built 1998 Load: 99.9 t ADT: 89,660

US 29 RAMPS I(7) &

Over: BEAVER RUN

0.67 MIle North OF MD 32, Howard, MD

Built 1992 Load: 99.9 t ADT: 3,132

MD 32

Over: CRICKET CREEK

0.88 MILE SOUTH OF MD 108, Howard, MD

Built 1994 Load: 99.9 t ADT: 45,660

MD 175

Over: BR OF LITTLE PATUXENT RI

2.1 MILE NORTH OF MD 108, Howard, MD

Built 1977 Load: 99.9 t ADT: 44,142

OAKLAND MILLS ROAD

Over: ELKHORN BRANCH OF LITTLE

1.0 M N Snowden River Pkw, Howard, MD

Built 1975 Load: 99.9 t ADT: 13,335

FREDERICK ROAD

Over: PLUMTREE BRANCH

1.0 MI W. OF MD RTE 29, Howard, MD

Built 1981 Load: 99.9 t ADT: 10,927

TAMAR DRIVE

Over: DORSEY RUN

0.1 MI W OF OLD MONGOMER, Howard, MD

Built 1989 Load: 99.9 t ADT: 11,824

SUMMER CLOUD WAY

Over: DORSEY RUN

0.3 MI W OF MD RTE 108, Howard, MD

Built 1990 Load: 99.9 t ADT: 605

NORTH CHATHAM LANE

Over: UNNAMED STREAM

AT PAULSKIRK DRIVE, Howard, MD

Built 1992 Load: 99.9 t ADT: 2,840

LITTLE PATUXENT PA

Over: WILDE LAKE BRANCH

0.2 MI N OF GOV WARFIELD, Howard, MD

Built 1967 Load: 99.9 t ADT: 31,936

BUCKSKIN LAKE DRIV

Over: BENSON BRANCH

.01 MI S FOLLY QUARTER RD, Howard, MD

Built 1985 Load: 99.9 t ADT: 395

MAPLE LAWN BOULEVA

Over: TRIBURATY TO HAMMOND BRA

700 FT S OF J HOPKINS RD, Howard, MD

Built 2006 Load: 99.9 t ADT: 7,155

MAPLE LAWN BOULEVA

Over: HAMMOND BRANCH

1000 FT S OF J HOPKINS RD, Howard, MD

Built 2005 Load: 99.9 t ADT: 7,155

AMBERWOODS WAY

Over: TRIB S BR PATAPSCO RIVER

1000 FT WEST OF MD 32, Howard, MD

Built 2000 Load: 99.9 t ADT: 50

COVENTRY MEADOWS D

Over: TRIB S BR PATAPSCO RIVER

2500' W of Sykesville Rd, Howard, MD

Built 2000 Load: 99.9 t ADT: 20

HIGH STEPPER TRAIL

Over: TRIB S BR PATAPSCO RIVER

1000 ft East of River Rd, Howard, MD

Built 2000 Load: 99.9 t ADT: 20

HUNT VALLEY DRIVE

Over: TRIBUTARY TO LITTLE CATT

1000' S of Union Chapel, Howard, MD

Built 1995 Load: 99.9 t ADT: 20

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