Total bridges
275
Public highway bridges in Harford County
County profile · official public datasets
Harford County, MD
275 public highway bridges tracked in the FHWA National Bridge Inventory: 38.2% rated Good, 57.1% Fair, 4.7% Poor.
- 275
- Public bridges
- 38.2%
- Good condition
- 4.7%
- Poor condition
The verdict
According to the Federal Highway Administration's 2024 National Bridge Inventory.
Harford County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.
- 13th
- of 24 on Poor share
- 4.7%
- Poor-condition share
- 275
- public highway bridges
- 1973
- 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.
Harford County Bridge Snapshot
According to the Federal Highway Administration's 2024 National Bridge Inventory, Harford County ranks #13 of 24 Maryland counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.7%). Harford County, Maryland contains 275 public highway bridges. Roughly 38.2% are rated “Good,” 57.1% “Fair,” and 4.7% “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
38.2%
105 of 275 rated 7-9
Fair condition
57.1%
157 of 275 rated 5-6
Poor condition
4.7%
13 of 275 rated 4 or below
In-state Poor-share rank
#13 of 24
Among Maryland counties with 5+ bridges, lower share ranks better
Condition distribution
Share of 275 NBI-tracked bridges by lowest applicable component rating.
Good 38.2% (105)
Fair 57.1% (157)
Poor 4.7% (13)
Harford County's Poor-condition bridges carry 65,285 vehicle crossings a day
That is 2.5% of the county's reported daily bridge traffic on 4.7% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 5,022 crossings a day against 6,672 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 275 of 275 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.
50.5% of Harford County's bridges have passed the 50-year mark
139 of the 275 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 38.2% 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 32.3% of the county's Poor-condition bridge traffic
US 1 over WINTERS RUN, built 1963, carries 21,112 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 13-bridge count understates how much of the daily burden sits on a single crossing.
Share is of the 65,285 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.
When Harford County's bridges were built
275 bridges with a recorded construction year, grouped by decade
- pre-1900 1
Built before 1900
1 bridges
- 1900s 3
1900–1909
3 bridges
- 1910s 3
1910–1919
3 bridges
- 1920s 7
1920–1929
7 bridges
- 1930s
1930–1939
31 bridges
- 1940s 5
1940–1949
5 bridges
- 1950s
1950–1959
24 bridges
- 1960s
1960–1969
45 bridges
- 1970s
1970–1979
40 bridges
- 1980s
1980–1989
31 bridges
- 1990s
1990–1999
38 bridges
- 2000s
2000–2009
21 bridges
- 2010s
2010–2019
20 bridges
- 2020s 6
2020–2029
6 bridges
What this shows Construction peaked in the 1960s, when 45 of the county's bridges still in the inventory were built, which is 16.4% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1973) matches the Maryland average (1972).
How Harford County compares with Maryland's closest counties by inventory size
The 5 Maryland counties nearest Harford County in number of bridges, with their condition splits. Its 4.7% Poor share is the 3rd-lowest of these 6. Its average build year of 1973 against a peer-group mean of 1969 is in line with the group.
Showing the 5 closest of 23 Maryland counties eligible for comparison.
| County | Bridges | Good | Fair | Poor | Avg. built |
|---|---|---|---|---|---|
| Howard County | 309 | 35.9% | 58.3% | 5.8% | 1978 |
| Washington County | 300 | 28.3% | 67% | 4.7% | 1956 |
| Harford County (this page) | 275 | 38.2% | 57.1% | 4.7% | 1973 |
| Allegany County | 245 | 36.7% | 57.1% | 6.1% | 1971 |
| Carroll County | 205 | 28.3% | 66.3% | 5.4% | 1968 |
| Cecil County | 193 | 32.1% | 63.7% | 4.1% | 1972 |
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 Harford 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 Harford County, both outside Maryland so the neighborhoods are not the same-state size table above.
Similar inventory size
Nearest county inventories outside MD (275 bridges here).
- Walker County, AL · 275 bridges
- Ellis County, KS · 275 bridges
- Seneca County, OH · 275 bridges
- Lyon County, IA · 276 bridges
Similar average build year
Nearest mean year-built outside MD (1973 here).
- Jefferson County, AL · avg 1973 · 1,068 bridges
- Erie County, NY · avg 1973 · 906 bridges
- Davidson County, TN · avg 1973 · 832 bridges
- Lancaster County, PA · avg 1973 · 801 bridges
Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.
Fair-condition bridges (157)
JAYHAWK RD
FairOver: UNKNOWN CREEK
W OF RECONNAISSANCE ST, Harford, MD
Built 2017 ADT: 100
CHERRY HILL ROAD
FairOver: DEER CREEK
0.02 MILES NE OF MD 24, Harford, MD
Built 1900 Load: 10.9 t ADT: 559
PUTNAM ROAD
FairOver: WEST BRANCH/WINTERS RUN
1.5 MILES E OF MD 165, Harford, MD
Built 1950 Load: 13.6 t ADT: 648
FORGE HILL ROAD
FairOver: DEER CREEK
1.6 MILES S OF US 1, Harford, MD
Built 1925 Load: 13.9 t ADT: 112
MOORES ROAD
FairOver: SAW MILL BRANCH
0.04 MILES N OF GREENE RD, Harford, MD
Built 1952 Load: 15.9 t ADT: 724
WHITAKER MILL ROAD
FairOver: WINTERS RUN
1.8 MILES W OF US 1, Harford, MD
Built 1991 Load: 16.3 t ADT: 3,051
MADONNA ROAD
FairOver: DEER CREEK
0.02 MI S OF TELEGRAPH RD, Harford, MD
Built 1965 Load: 16.3 t ADT: 89
FRIENDSHIP ROAD
FairOver: OVERSHOT BRANCH
1.0 MILES S OF MD 152, Harford, MD
Built 1975 Load: 16.8 t ADT: 975
U.S. ROUTE 40
FairOver: SUSQUEHANNA RIVER-PA RR
HARFORD-CECIL CO LINE, Harford, MD
Built 1939 Load: 20.9 t ADT: 25,780
CULLUM ROAD
FairOver: TRIBUTARY OF JAMES RUN
0.3 MILE N OF CRESWELL RD, Harford, MD
Built 1920 Load: 21.8 t ADT: 300
OLD PYLESVILLE RD
FairOver: BROAD CREEK
0.4 MILES N OF MD 543, Harford, MD
Built 1928 Load: 21.8 t ADT: 161
HEAPS SCHOOL ROAD
FairOver: BROAD CREEK
0.3 MILES N OF MD 543, Harford, MD
Built 1965 Load: 22.2 t ADT: 405
MD 136
FairOver: DEER CREEK
2.64 MILES SOUTH OF US 1, Harford, MD
Built 1931 Load: 23.6 t ADT: 9,984
STAFFORD ROAD
FairOver: HERRING RUN
0.01 MILE S OF LAPIDUM RD, Harford, MD
Built 1930 Load: 24.0 t ADT: 58
MD 132
FairOver: AMTRAK
0.19 MILE EAST OF US 40, Harford, MD
Built 1983 Load: 24.5 t ADT: 3,900
OAK FARM ROAD
FairOver: MILL BROOK
0.4 MIL E OF GLENVILLE RD, Harford, MD
Built 1988 Load: 24.9 t ADT: 102
OLD YORK ROAD
FairOver: LITTLE GUNPOWDER FALLS
ON BALT CO LINE, Harford, MD
Built 1955 Load: 25.4 t ADT: 245
US 1
FairOver: SUSQUEHANNA RIVER
ON CECIL CO LINE, Harford, MD
Built 1927 Load: 25.8 t ADT: 14,243
MD 624
FairOver: BROAD CREEK
1.15 MILES N OF MD 165, Harford, MD
Built 1936 Load: 26.8 t ADT: 3,920
AMOSS ROAD
FairOver: ISLAND BRANCH
0.2 MILES S OF AMOSS ML R, Harford, MD
Built 1972 Load: 27.7 t ADT: 125
MD 24
FairOver: NORTH STIRRUP RUN
3.09 MILES NORTH OF MD 23, Harford, MD
Built 1917 Load: 28.6 t ADT: 3,572
FASHION WAY
FairOver: TRIB / WINTERS RUN
0.5 MILES N OF MD 7, Harford, MD
Built 1972 Load: 28.6 t ADT: 565
PLEASANTVILLE ROAD
FairOver: WINTERS RUN
1.5 MILES N OF MD 152, Harford, MD
Built 1958 Load: 28.6 t ADT: 3,320
US 1 BU
FairOver: BYNUM RUN
.06 M N OF MOORES MILL RD, Harford, MD
Built 1953 Load: 29.0 t ADT: 11,230
CHESTNUT HILL ROAD
FairOver: CABBAGE RUN
0.7 MILES NW OF MD 543, Harford, MD
Built 1938 Load: 29.0 t ADT: 642
US 1
FairOver: MD 24
1.1 MILES S OF US 1BU, Harford, MD
Built 1964 Load: 29.5 t ADT: 20,002
MD 646
FairOver: BROAD CREEK
0.77 MILE NORTH OF MD 543, Harford, MD
Built 1933 Load: 29.5 t ADT: 1,140
MD 7
FairOver: GRAYS RUN
1.01 MILES SOUTH OF US 40, Harford, MD
Built 1925 Load: 29.9 t ADT: 12,210
MD 136
FairOver: ISLAND BRANCH
1.0 MILE SOUTH OF MD 23, Harford, MD
Built 1935 Load: 30.4 t ADT: 1,901
GREEN ROAD
FairOver: DEER CREEK
0.2 MILES E OF BALT CO, Harford, MD
Built 1900 Load: 30.4 t ADT: 155
US 40
FairOver: SWAN CREEK
0.26 MILE WEST OF MD 132B, Harford, MD
Built 1935 Load: 30.8 t ADT: 27,800
CEDAR LANE
FairOver: TRIB / BYNUM RUN
0.8 MILES W OF MD 136, Harford, MD
Built 1971 Load: 30.8 t ADT: 125
MD 543
FairOver: BR OF BYNUM RUN
0.3 MILE NORTH OF MD 136, Harford, MD
Built 1936 Load: 31.3 t ADT: 14,221
QUAKER BOTTOM ROAD
FairOver: ROCK RUN
0.01 MIL S OF ROCK RUN RD, Harford, MD
Built 1982 Load: 31.3 t ADT: 220
MD 155
FairOver: I-95
Milepost M89.0, Harford, MD
Built 1960 Load: 31.3 t ADT: 15,420
FALLING BRANCH RD
FairOver: FALLING BRANCH
0.6 MI W OF CLERMONT M RD, Harford, MD
Built 1973 Load: 31.7 t ADT: 22
ABINGDON ROAD
FairOver: I-95
I-95 Milepost M77.9, Harford, MD
Built 1963 Load: 31.7 t ADT: 13,161
STEPNEY ROAD
FairOver: I-95
Milepost M83.4, Harford, MD
Built 1963 Load: 32.2 t ADT: 1,810
US 1 BU
FairOver: WINTERS RUN
0.87 MILE NORTH OF US 1, Harford, MD
Built 1930 Load: 32.7 t ADT: 20,564
US 1 & RAMP C(2)
FairOver: BYNUM RUN
0.25 MILE NORTH OF MD 24, Harford, MD
Built 1964 Load: 32.7 t ADT: 23,320
MD 165
FairOver: BROAD CREEK
0.4 MILE NORTH OF MD 543, Harford, MD
Built 1959 Load: 32.7 t ADT: 5,772
MD 462
FairOver: SWAN CREEK
0.84 MILE NORTH OF MD 22, Harford, MD
Built 1978 Load: 32.7 t ADT: 7,401
MD 543
FairOver: DEER CREEK
1.47 MILES S OF MD 440, Harford, MD
Built 1932 Load: 32.7 t ADT: 7,736
LAKE FANNY ROAD
FairOver: WINTERS RUN
0.2 MILES S OF US 1, Harford, MD
Built 1913 Load: 32.7 t ADT: 11
OLD FALLSTON ROAD
FairOver: MA & PA RAILROAD (ABAND)
0.3 MILES S OF MD 152, Harford, MD
Built 1930 Load: 32.7 t ADT: 2,210
CLAYTON ROAD
FairOver: MOUNTAIN BRANCH
0.3 MILES W OF SINGER RD, Harford, MD
Built 1970 Load: 32.7 t ADT: 766
I-95
FairOver: GRAYS RUN
Milepost M83.1, Harford, MD
Built 1963 Load: 32.7 t ADT: 116,162
I-95
FairOver: SUSQUEHANNA RIVER PA RR
HARFORD-CECIL CO LINE, Harford, MD
Built 1963 Load: 32.7 t ADT: 86,430
RECKORD ROAD
FairOver: WILDCAT BRANCH
0.1 MILES S OF US 1, Harford, MD
Built 1957 Load: 33.1 t ADT: 961
HESS ROAD
FairOver: YELLOW BRANCH
0.5 MILES E OF MD 146, Harford, MD
Built 1950 Load: 33.1 t ADT: 8,065
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.