County profile · official public datasets

Baltimore County, MD

783 public highway bridges tracked in the FHWA National Bridge Inventory: 29.9% rated Good, 66.9% Fair, 3.2% Poor.

783
Public bridges
29.9%
Good condition
3.2%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Baltimore County posts a better-than-median Poor-condition share among rated counties in the state across large county bridge inventory.

Top 33%
lowest Poor share in state
3.2%
Poor-condition share
783
public highway bridges
1971
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Baltimore County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Baltimore County ranks #8 of 24 Maryland counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 3.2%). Baltimore County, Maryland contains 783 public highway bridges. Roughly 29.9% are rated “Good,” 66.9% “Fair,” and 3.2% “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.

Total bridges

783

Public highway bridges in Baltimore County

Good condition

29.9%

234 of 783 rated 7-9

Fair condition

66.9%

524 of 783 rated 5-6

Poor condition

3.2%

25 of 783 rated 4 or below

In-state Poor-share rank

#8 of 24

Among Maryland counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 783 NBI-tracked bridges by lowest applicable component rating.

Good
29.9% (234)
Fair
66.9% (524)
Poor
3.2% (25)

Baltimore County's Poor-condition bridges carry 185,852 vehicle crossings a day

That is 0.8% of the county's reported daily bridge traffic on 3.1% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 7,744 crossings a day against 25,748 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 782 of 783 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

55.8% of Baltimore County's bridges have passed the 50-year mark

437 of the 783 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 29.9% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 18.7% of the county's Poor-condition bridge traffic

ROLLING ROAD over TRIBUTARY TO DEAD RUN, built 1961, carries 34,803 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 25-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 185,852 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Baltimore County's bridges were built

783 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 152 of the county's bridges still in the inventory were built, which is 19.4% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1971) matches the Maryland average (1972).

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Baltimore County compares with Maryland's closest counties by inventory size

The 5 Maryland counties nearest Baltimore County in number of bridges, with their condition splits. Its 3.2% Poor share is the 4th-lowest of these 6. Its average build year of 1971 against a peer-group mean of 1974 is in line with the group.

Showing the 5 closest of 23 Maryland counties eligible for comparison.

Bridge inventory size and condition shares for Baltimore County and the 5 Maryland counties closest to it in inventory size
County Bridges Poor
Baltimore County (this page) 783 3.2%
Prince George's County 576 3.1%
Montgomery County 515 4.9%
Frederick County 486 2.7%
Anne Arundel County 389 1.5%
Baltimore city County 374 8.6%

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Baltimore County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Baltimore County, both outside Maryland so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside MD (783 bridges here).

Similar average build year

Nearest mean year-built outside MD (1971 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 783 Good 234 Fair 524 Poor 25

Fair-condition bridges (524)

SUDBROOK LANE

Fair

Over: CSX RAILROAD

0.6 MI S REISTERSTOWN RD, Baltimore, MD

Built 1907 Load: 54.4 t ADT: 2,972

RED RUN BOULEVARD

Fair

Over: RED RUN

0.64 MI E OF MD 940, Baltimore, MD

Built 1985 Load: 54.4 t ADT: 18,272

CORBETT ROAD

Fair

Over: TRIBUTARY TO GUNPOWDER F

0.60 MI E OF RAILROAD AVE, Baltimore, MD

Built 1926 Load: 54.9 t ADT: 400

PAINTERS MILL ROAD

Fair

Over: RED RUN

0.15 MI S OF I-795, Baltimore, MD

Built 1984 Load: 54.9 t ADT: 49,918

IS 695 OL RAMP C

Fair

Over: IS 70 RAMPS B & F

@ I-695 & I-70 INTERCHANG, Baltimore, MD

Built 1966 Load: 55.3 t ADT: 25,300

MD 695 RAMP F(4)

Fair

Over: CSX TRANSPORTATION

0.10 MI S OF US 40, Baltimore, MD

Built 1975 Load: 55.8 t ADT: 6,742

MCDONOGH ROAD

Fair

Over: IS 795 MTA METRO

0.06 MI W OF PURDY LA, Baltimore, MD

Built 1983 Load: 55.8 t ADT: 11,803

UPPER BECKLEYSVILL

Fair

Over: GEORGES RUN

0.55 MI SW OF MD 25, Baltimore, MD

Built 1930 Load: 55.8 t ADT: 1,381

KELSO DRIVE

Fair

Over: STEMMERS RUN

0.2 MI SW OF ROSSVILLE RD, Baltimore, MD

Built 1988 Load: 55.8 t ADT: 5,707

IS 83 NBR

Fair

Over: SHAWAN ROAD WBR

0.91 MI N OF BEAVERDAM RD, Baltimore, MD

Built 1975 Load: 56.2 t ADT: 33,380

IS 83 SBR

Fair

Over: SHAWAN ROAD WBR

0.91 MI N OF BEAVERDAM RD, Baltimore, MD

Built 1975 Load: 56.2 t ADT: 33,380

MONKTON ROAD

Fair

Over: CHARLES RUN

500 FT S SHEPPERD ROAD, Baltimore, MD

Built 1976 Load: 56.2 t ADT: 2,343

CHARMUTH ROAD

Fair

Over: LONG QUARTER BRANCH

0.62 MI N OF MD 146, Baltimore, MD

Built 1959 Load: 56.2 t ADT: 10,087

MANOR ROAD

Fair

Over: PARKER BRANCH

1.4 M SE OF OLD YORK RD, Baltimore, MD

Built 1985 Load: 56.2 t ADT: 4,309

JERICHO ROAD

Fair

Over: TRIBUTARY TO LITTLE GUNP

0.3 MI N FRANKLINVILLE RD, Baltimore, MD

Built 1991 Load: 56.2 t ADT: 527

MD 695A

Fair

Over: NORFOLK SOUTHERN RR

.08 MILE SOUTH OF MD 695B, Baltimore, MD

Built 1937 Load: 56.7 t ADT: 7,360

IS 195 EBR

Fair

Over: US 1

0.58 MI N OF AA CO LINE, Baltimore, MD

Built 1987 Load: 56.7 t ADT: 41,831

EBENEZER ROAD

Fair

Over: AMTRAK RAILROAD

0.1 MI NW EASTERN AVE EXT, Baltimore, MD

Built 1982 Load: 56.7 t ADT: 11,290

MD 43 EBR

Fair

Over: US 40

0.39 MILE EAST OF MD 7, Baltimore, MD

Built 1968 Load: 57.1 t ADT: 8,100

MD 41

Fair

Over: TRIB TO HERRING RUN

0.14 M N OF BALTO CITY, Baltimore, MD

Built 1963 Load: 57.1 t ADT: 29,990

IS 95 SBR

Fair

Over: PROPOSED LANSDOWNE ROAD

0.31 MI S OF BALT CITY, Baltimore, MD

Built 1971 Load: 57.1 t ADT: 182,461

IS 795 SBR

Fair

Over: CSX TRANSPORTATION

0.82 MI N OF MCDONOUGH RD, Baltimore, MD

Built 1984 Load: 57.1 t ADT: 110,982

SHELBOURNE ROAD

Fair

Over: TRIBUTARY TO WEST BRANCH

0.17 MI S OF LOCUST AVE, Baltimore, MD

Built 1930 Load: 57.1 t ADT: 3,000

MD 131

Fair

Over: IS 83

1.20 MI W OF MD 45, Baltimore, MD

Built 1973 Load: 57.6 t ADT: 11,441

PUTTY HILL AVENUE

Fair

Over: TRIBUTARY TO HERRING RUN

0.25 MI W OF MD 41, Baltimore, MD

Built 1961 Load: 57.6 t ADT: 12,957

IS 95 NBR

Fair

Over: PROPOSED LANSDOWNE ROAD

0.31 MI S OF BALT CITY, Baltimore, MD

Built 1972 Load: 58.0 t ADT: 182,461

BELFAST ROAD

Fair

Over: PINEY CREEK

0.2 MI E. OF IS83 EXIT 24, Baltimore, MD

Built 1953 Load: 58.0 t ADT: 4,918

I-695 INNER LOOP

Fair

Over: P AND B RAILROAD

0.3 MI W OF MD 151, Baltimore, MD

Built 1997 Load: 58.0 t ADT: 11,133

IS 83 SBR

Fair

Over: DAIRY ROAD

0.99 MILE SOUTH OF MD 45, Baltimore, MD

Built 1958 Load: 58.5 t ADT: 50,431

IS 795 NBR

Fair

Over: CSX TRANSPORTATION

0.71 MILE NORTH OF IS 695, Baltimore, MD

Built 1983 Load: 58.5 t ADT: 110,982

IS 83 NBR

Fair

Over: DAIRY ROAD

0.99 MILE SOUTH OF MD 45, Baltimore, MD

Built 1958 Load: 59.0 t ADT: 50,431

BELFAST ROAD

Fair

Over: TRIBUTARY TO PINEY CREEK

0.6 MI W OF IS 83, Baltimore, MD

Built 1920 Load: 59.0 t ADT: 2,600

IS 83 SBR

Fair

Over: SHAWAN ROAD EBR

0.90 MI N OF BEAVERDAM RD, Baltimore, MD

Built 1959 Load: 59.4 t ADT: 33,380

MD 695 RAMP 7A

Fair

Over: FORCE MAIN

@ MD 695 & MD 702, Baltimore, MD

Built 1972 Load: 59.4 t ADT: 7,951

MD 45

Fair

Over: LITTLE FALLS

0.05 MI N OF FREDERICK RD, Baltimore, MD

Built 1930 Load: 59.9 t ADT: 5,350

IS 795 NBR

Fair

Over: CSX TRANSPORTATION

0.82 MI N OF MCDONOUGH RD, Baltimore, MD

Built 1984 Load: 59.9 t ADT: 110,982

COLBURY ROAD

Fair

Over: TRIBUTARY TO HERRING RUN

0.01 MI W OF GOUCHER BLVD, Baltimore, MD

Built 1968 Load: 59.9 t ADT: 4,763

MD 43

Fair

Over: BRANCH OF WHITEMARSH RUN

1.61 MILE EAST OF IS 695, Baltimore, MD

Built 1991 Load: 60.3 t ADT: 36,232

IS 695

Fair

Over: MD 542

1.06 MILE SOUTH OF MD 41, Baltimore, MD

Built 1961 Load: 60.8 t ADT: 149,621

SILVER SPRING ROAD

Fair

Over: TRIBUTARY TO WHITE MARSH

.01 M E OF PERRY HALL BLV, Baltimore, MD

Built 1991 Load: 60.8 t ADT: 9,324

I-695 OUTER LOOP

Fair

Over: P AND B RAILROAD

0.3 MI W OF MD 151, Baltimore, MD

Built 1997 Load: 60.8 t ADT: 12,337

MD 295

Fair

Over: DAISY AVENUE

0.32 MI S OF BALT CITY, Baltimore, MD

Built 1949 Load: 61.2 t ADT: 66,611

IS 795 NBR

Fair

Over: MT WILSON LANE

0.62 MILE SOUTH OF MD 37, Baltimore, MD

Built 1983 Load: 61.2 t ADT: 110,982

IS 795 SBR

Fair

Over: MT WILSON LANE

0.62 MILE SOUTH OF MD 37, Baltimore, MD

Built 1983 Load: 61.2 t ADT: 110,982

GUNPOWDER ROAD

Fair

Over: GUNPOWDER FALLS

2.3 MI. S. MD-PA ST LINE, Baltimore, MD

Built 1968 Load: 61.2 t ADT: 163

IS 695

Fair

Over: IS 83 SBR & JONES FALLS

0.17 MILE SOUTH OF IS 83, Baltimore, MD

Built 1961 Load: 62.6 t ADT: 192,739

IS 195 NBR

Fair

Over: FRANCIS AVENUE

0.35 MILE SOUTH OF IS 95, Baltimore, MD

Built 1969 Load: 62.6 t ADT: 41,831

SEVERN AVENUE

Fair

Over: AMTRAK RAILROAD

0.06 MI E OF IS 695, Baltimore, MD

Built 1979 Load: 62.6 t ADT: 1,575

OWINGS MILLS BOULE

Fair

Over: GWYNNS FALLS

1 MI N OF REISTERSTOWN RD, Baltimore, MD

Built 1989 Load: 62.6 t ADT: 29,343

IS 795 RAMP B

Fair

Over: GWYNNS FALLS

@ IS 795 & IS 695, Baltimore, MD

Built 1984 Load: 63.0 t ADT: 23,650

Read our methodology - how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges 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. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.