Total bridges
783
Public highway bridges in Baltimore County
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.
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
- pre-1900 9
Built before 1900
9 bridges
- 1900s 7
1900–1909
7 bridges
- 1910s 12
1910–1919
12 bridges
- 1920s 37
1920–1929
37 bridges
- 1930s 33
1930–1939
33 bridges
- 1940s 22
1940–1949
22 bridges
- 1950s
1950–1959
95 bridges
- 1960s
1960–1969
152 bridges
- 1970s
1970–1979
118 bridges
- 1980s
1980–1989
114 bridges
- 1990s
1990–1999
67 bridges
- 2000s
2000–2009
66 bridges
- 2010s 42
2010–2019
42 bridges
- 2020s 9
2020–2029
9 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).
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.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Baltimore County (this page) | 783 | 29.9% | 66.9% | 3.2% | 1971 |
| Prince George's County | 576 | 36.6% | 60.2% | 3.1% | 1976 |
| Montgomery County | 515 | 38.8% | 56.3% | 4.9% | 1978 |
| Frederick County | 486 | 43.2% | 54.1% | 2.7% | 1971 |
| Anne Arundel County | 389 | 32.6% | 65.8% | 1.5% | 1980 |
| Baltimore city County | 374 | 16% | 75.4% | 8.6% | 1964 |
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).
- Hamilton County, OH · 783 bridges
- El Paso County, TX · 783 bridges
- Johnson County, KS · 781 bridges
- Fulton County, GA · 775 bridges
Similar average build year
Nearest mean year-built outside MD (1971 here).
- Wayne County, MI · avg 1971 · 1,026 bridges
- Washington County, PA · avg 1971 · 655 bridges
- Linn County, OR · avg 1971 · 566 bridges
- Monmouth County, NJ · avg 1971 · 505 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
All bridges (783)
US 1 ALT
FairOver: IS 695
1.45 N OF US 1, Baltimore, MD
Built 1957 Load: 41.7 t ADT: 23,632
IS 83/IS 695
FairOver: THORNTON ROAD
1.09 MI S OF MD 139, Baltimore, MD
Built 1954 Load: 41.7 t ADT: 222,500
MD 147
FairOver: IS 695
1.37 MI N OF BALT CITY, Baltimore, MD
Built 1961 Load: 41.7 t ADT: 31,160
WISEBURG ROAD
FairOver: LITTLE FALLS
100 FT W OF GRAYSTONE RD, Baltimore, MD
Built 1988 Load: 41.7 t ADT: 1,600
MD 45
FairOver: PINEY CREEK
0.06 MI N OF SPARKS RD, Baltimore, MD
Built 1975 Load: 42.2 t ADT: 23,992
IS 83 SBR
FairOver: QUAKER BOTTOM ROAD
0.9 M N OF BR NO 0305600, Baltimore, MD
Built 1959 Load: 42.2 t ADT: 33,380
IS 83 SBR
FairOver: THORNTON MILL ROAD
0.9 M S OF BR NO 0305500, Baltimore, MD
Built 1959 Load: 42.2 t ADT: 60,263
IS 95 SBR
FairOver: IS 95 RAMP I
1.07 MILE NORTH OF US 1, Baltimore, MD
Built 1969 Load: 42.2 t ADT: 182,461
MD 7
FairOver: BEAN BRANCH
2.03 MI S OF HARFORD CO, Baltimore, MD
Built 1975 Load: 42.2 t ADT: 11,470
KING AVENUE
FairOver: I-95
0.98 MI W OF MD 7, Baltimore, MD
Built 1997 Load: 42.2 t ADT: 4,994
MD 128
FairOver: WESTERN RUN
2.36 MILE WEST OF MD 25, Baltimore, MD
Built 1945 Load: 42.6 t ADT: 2,991
IS 695 RAMP O
FairOver: MD 122
0.45 MI N OF IS 70, Baltimore, MD
Built 1961 Load: 42.6 t ADT: 5,718
MD 702 EBR
FairOver: FORCE MAIN
0.03 MILE EAST OF MD 695, Baltimore, MD
Built 1972 Load: 42.6 t ADT: 18,644
BOYCE AVENUE
FairOver: ROLAND RUN BRANCH
0.17 MI W OF MD 139, Baltimore, MD
Built 1920 Load: 42.6 t ADT: 1,194
I-895 SB
FairOver: HALETHORPE FARMS RD
Milepost 2.4, Baltimore, MD
Built 1957 Load: 42.6 t ADT: 8,846
MCDONOGH ROAD
FairOver: CSX TRANSPORTATION
0.06 MILE WEST OF IS 795, Baltimore, MD
Built 1941 Load: 43.1 t ADT: 13,380
IS 95 NBR
FairOver: US1 AMTRAK POTOMAC AVE
0.85 MILE SOUTH OF IS 695, Baltimore, MD
Built 1970 Load: 43.1 t ADT: 179,291
IS 95 SBR
FairOver: US1 AMTRAK POTOMAC AVE
0.85 MILE SOUTH OF IS 695, Baltimore, MD
Built 1970 Load: 43.1 t ADT: 176,796
POCOCK ROAD
FairOver: LITTLE GUNPOWDER FALLS
0.6 MI E HESS ROAD, Baltimore, MD
Built 1978 Load: 43.1 t ADT: 230
CORBETT ROAD
FairOver: TRIBUTARY TO GUNPOWDER F
1.1 MILES EAST OF MD 45, Baltimore, MD
Built 1922 Load: 43.1 t ADT: 720
I-95
FairOver: LITTLE GUNPOWDER FALLS
BALTIMORE-HARFORD CO LINE, Baltimore, MD
Built 1963 Load: 43.1 t ADT: 178,830
IS 695
FairOver: INGLESIDE AVENUE
0.49 MILE SOUTH OF US 40, Baltimore, MD
Built 1957 Load: 43.5 t ADT: 180,306
IS 95 NBR
FairOver: IS 695
0.83 MILE NORTH OF US 1, Baltimore, MD
Built 1969 Load: 43.5 t ADT: 91,742
MD 702 WBR
FairOver: MD 150
1.20 MI E OF MD 695, Baltimore, MD
Built 1970 Load: 43.5 t ADT: 27,579
IS 95 NBR & RAMP
FairOver: SULPHUR SPRING ROAD
0.32 MILE SOUTH OF IS 695, Baltimore, MD
Built 1971 Load: 43.5 t ADT: 176,796
MD 702 EBR
FairOver: AMTRAK & 695 RMP 7
0.20 MI E OF MD 695, Baltimore, MD
Built 1972 Load: 43.5 t ADT: 18,644
MD 695 OL
FairOver: AMTRAK
0.08 MI N OF US 40, Baltimore, MD
Built 1973 Load: 43.5 t ADT: 36,361
MD 695 IL
FairOver: AMTRAK
0.22 MI N OF MD 702, Baltimore, MD
Built 1973 Load: 43.5 t ADT: 36,361
IS 795 NBR
FairOver: CHURCH ROAD
0.58 MI S OF BR NO 033340, Baltimore, MD
Built 1985 Load: 43.5 t ADT: 68,761
IS 795 SBR
FairOver: CHURCH ROAD
0.58 MI S OF BR NO 033340, Baltimore, MD
Built 1985 Load: 43.5 t ADT: 68,761
MONKTON ROAD
FairOver: GUNPOWDER FALLS
0.6 MI E OF PINEY HILL RD, Baltimore, MD
Built 1975 Load: 43.5 t ADT: 3,850
EBENEZER ROAD
FairOver: EASTERN AVENUE
EBENZER AT EASTERN AVENUE, Baltimore, MD
Built 1982 Load: 43.5 t ADT: 11,600
MD 125
FairOver: PATAPSCO RIVER
AT HOWARD COUNTY LINE, Baltimore, MD
Built 1982 Load: 44.0 t ADT: 5,551
RUXTON ROAD
FairOver: IS 83
0.26 MI W OF MD 25, Baltimore, MD
Built 1961 Load: 44.0 t ADT: 5,329
MD 147
FairOver: LONG GREEN CREEK
0.02 MI N OF HARTLEY MILL, Baltimore, MD
Built 1915 Load: 44.0 t ADT: 5,752
ROLLING ROAD
FairOver: CSX TRANSPORTATION
.26 MI. N. OF I-95 & US 1, Baltimore, MD
Built 1931 Load: 44.0 t ADT: 39,381
IS 795 RAMP G
FairOver: MTA METRO
@ METRO, Baltimore, MD
Built 1983 Load: 44.0 t ADT: 37,780
US 40
FairOver: CSX TRANSPORTATION
0.45 MI W OF MD 700, Baltimore, MD
Built 1990 Load: 44.4 t ADT: 47,120
IS 695 RAMP 2
FairOver: WHITEMARSH BRANCH
0.02 MI N OF MD 147, Baltimore, MD
Built 1961 Load: 44.4 t ADT: 8,511
MD 702 WBR
FairOver: AMTRAK & 695 RMP 7
0.20 MI E OF MD 695, Baltimore, MD
Built 1972 Load: 44.4 t ADT: 19,406
MD 702 WBR
FairOver: FORCE MAIN
0.03 MILE EAST OF MD 695, Baltimore, MD
Built 1972 Load: 44.4 t ADT: 19,406
MARLYN AVENUE
FairOver: MD 702
0.69 MI N OF MD 150, Baltimore, MD
Built 1973 Load: 44.4 t ADT: 7,687
MD 695 OL
FairOver: NORFOLK SOUTHERN RR MORS
0.26 MILE NORTH OF US 1, Baltimore, MD
Built 1974 Load: 44.4 t ADT: 34,762
MD 43
FairOver: BRANCH OF WHITEMARSH RUN
1.04 MILE WEST OF IS 95, Baltimore, MD
Built 1990 Load: 44.4 t ADT: 29,352
BLUE MOUNT ROAD
FairOver: LITTLE FALLS
1.7 MI E OF MONKTON ROAD, Baltimore, MD
Built 1995 Load: 44.4 t ADT: 854
BEACONSFIELD DRIVE
FairOver: BRANCH OF WHITE MARSH RU
0.1 MI E. HONEYGO BLVD., Baltimore, MD
Built 1986 Load: 44.4 t ADT: 9,681
IS 83 NBR
FairOver: GUNPOWDER FALLS
1.92 M N OF MD 137, Baltimore, MD
Built 1958 Load: 44.9 t ADT: 59,820
MD 695 IL
FairOver: NORFOLK SOUTHERN RR
0.18 MILE SOUTH OF MD 151, Baltimore, MD
Built 1966 Load: 44.9 t ADT: 41,012
MIDDLE RIVER ROAD
FairOver: CSX RAILROAD
0.09 MI N OF US 40, Baltimore, MD
Built 1991 Load: 44.9 t ADT: 17,445
US 1
FairOver: SULPHUR SPRING ROAD
0.33 MI N OF IS 95, Baltimore, MD
Built 1947 Load: 45.4 t ADT: 11,542
Read our methodology - how this data is sourced, computed, and verified.
Related
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.