County profile · official public datasets

Calvert County, MD

33 public highway bridges tracked in the FHWA National Bridge Inventory: 45.5% rated Good, 54.5% Fair, 0% Poor.

33
Public bridges
45.5%
Good condition
0%
Poor condition

The verdict

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

Calvert County pairs a top-5% lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 4%
lowest Poor share in state
0%
Poor-condition share
33
public highway bridges
1985
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.

Calvert County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Calvert County ranks #1 of 24 Maryland counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Calvert County, Maryland contains 33 public highway bridges. Roughly 45.5% are rated “Good,” 54.5% “Fair,” and 0% “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

33

Public highway bridges in Calvert County

Good condition

45.5%

15 of 33 rated 7-9

Fair condition

54.5%

18 of 33 rated 5-6

Poor condition

0%

0 of 33 rated 4 or below

In-state Poor-share rank

#1 of 24

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

Condition distribution

Share of 33 NBI-tracked bridges by lowest applicable component rating.

Good
45.5% (15)
Fair
54.5% (18)
Poor
0% (0)

27.3% of Calvert County's bridges have passed the 50-year mark

9 of the 33 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 45.5% 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.

When Calvert County's bridges were built

33 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 8 of the county's bridges still in the inventory were built, which is 24.2% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1985, 13 years newer than the Maryland average of 1972.

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

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

The 5 Maryland counties nearest Calvert County in number of bridges, with their condition splits. Its 0% Poor share is the 1st-lowest of these 6. Its average build year of 1985 against a peer-group mean of 1969 is 16 years newer.

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

Bridge inventory size and condition shares for Calvert County and the 5 Maryland counties closest to it in inventory size
County Bridges Poor
St. Mary's County 50 4%
Dorchester County 47 10.6%
Somerset County 46 6.5%
Kent County 44 4.5%
Talbot County 42 2.4%
Calvert County (this page) 33 0%

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 Calvert 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 Calvert County, both outside Maryland so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside MD (33 bridges here).

Similar average build year

Nearest mean year-built outside MD (1985 here).

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

All 33 Good 15 Fair 18 Poor 0

All bridges (33)

MD 4

Fair

Over: PATUXENT RIVER & TOWN CR

ON ST MARYS CO LINE, Calvert, MD

Built 1977 Load: 20.4 t ADT: 28,338

MD 231

Fair

Over: PATUXENT RIVER

ON CHARLES CO LINE, Calvert, MD

Built 1952 Load: 23.1 t ADT: 12,021

MD 263

Fair

Over: PLUM POINT CREEK

0.16 MI E OF TOBACCO RD, Calvert, MD

Built 1928 Load: 24.5 t ADT: 692

MD 4 NB

Fair

Over: HALL CREEK

.442 M N OF MT HARMONY RD, Calvert, MD

Built 1966 Load: 35.4 t ADT: 35,171

MD 4 SB

Fair

Over: HALL CREEK

.442 M N OF MT HARMONY RD, Calvert, MD

Built 1929 Load: 35.4 t ADT: 35,171

SOLOMONS ISLAND RD

Fair

Over: THE NARROWS

ON SOLOMONS ISLAND, Calvert, MD

Built 1958 Load: 38.5 t ADT: 4,126

MD 2 SB

Fair

Over: HUNTING CREEK

.086 MILE NORTH OF MD 263, Calvert, MD

Built 1992 Load: 39.0 t ADT: 46,798

MD 260

Fair

Over: HALL CREEK

0.32 MILE EAST OF MD 778, Calvert, MD

Built 1951 Load: 39.0 t ADT: 13,581

MD 2 NB

Fair

Over: HUNTING CREEK

.086 MILE NORTH OF MD 263, Calvert, MD

Built 1969 Load: 40.8 t ADT: 18,785

MD 263

Fair

Over: HUNTING CREEK

0.04 MILE EAST OF MD 2, Calvert, MD

Built 1926 Load: 41.3 t ADT: 7,412

MD 4 SB

Fair

Over: LYONS CREEK

ON ANNE ARUNDEL CO LINE, Calvert, MD

Built 1959 Load: 41.3 t ADT: 46,661

CHANEYVILLE ROAD

Fair

Over: GRAHAM CREEK

0.35 MI N OF MD 262, Calvert, MD

Built 2009 Load: 44.4 t ADT: 433

MD 4 NB

Fair

Over: LYONS CREEK

ON ANNE ARUNDEL CO LINE, Calvert, MD

Built 1987 Load: 49.9 t ADT: 46,661

PARRAN ROAD

Fair

Over: SAINT LEONARD CREEK

0.3 MI N OF MD RTE 2/4, Calvert, MD

Built 1994 Load: 67.6 t ADT: 682

COX ROAD

Fair

Over: SEWELL BRANCH

0.5 MILES EAST OF MD 2-4, Calvert, MD

Built 1994 Load: 89.8 t ADT: 1,670

MD 2 & 4

Fair

Over: JOHNS CREEK

0.19 M S OF NURSERY ROAD, Calvert, MD

Built 1987 Load: 99.9 t ADT: 26,941

DALRYMPLE ROAD

Fair

Over: FISHING CREEK

2.25 MI SE OF MD 2, Calvert, MD

Built 2000 Load: 99.9 t ADT: 375

BALL ROAD

Fair

Over: ST. LEONARD CREEK

0.3 MILES WEST OF MD 2-4, Calvert, MD

Built 1980 Load: 99.9 t ADT: 1,360

MD 261

Good

Over: FISHING CREEK

0.3 MI S OF MD 260, Calvert, MD

Built 2019 Load: 36.9 t ADT: 18,067

MD 506

Good

Over: BATTLE CREEK

1.77 MI E OF SIXES ROAD, Calvert, MD

Built 2003 Load: 37.2 t ADT: 1,997

SOUTHERN CONNECTOR

Good

Over: TRIBUTARY TO ST. JOHN CR

0.5 MI WEST OF MD 760, Calvert, MD

Built 2008 Load: 39.5 t ADT: 7,626

MD 509

Good

Over: GOVERNOR RUN

0.79 MI E OF MD 765, Calvert, MD

Built 2002 Load: 41.7 t ADT: 791

MD 4 RAMP 5

Good

Over: MD 4

0.12 M S OF AA/CAL LINE, Calvert, MD

Built 2003 Load: 53.5 t ADT: 7,166

MD 4 RAMP 5

Good

Over: LYONS CREEK

AA/CAL COUNTY LINE, Calvert, MD

Built 2003 Load: 61.2 t ADT: 7,166

MD 260D-MT HARMONY

Good

Over: MD 260

0.14 MILE WEST OF MD 260, Calvert, MD

Built 2005 Load: 62.1 t ADT: 7,890

WARD ROAD

Good

Over: TRIBUTARY TO HALL CREEK

1.10 MI EAST OF MD 4, Calvert, MD

Built 1997 Load: 65.3 t ADT: 924

HARDESTY ROAD

Good

Over: FISHING CREEK

0.44 MI S OF KAPPOPOS WAY, Calvert, MD

Built 1998 Load: 66.2 t ADT: 600

W COVE POINT ROAD

Good

Over: WATERFORD BRANCH

0.1 MI. W. OF MD 2/MD 4, Calvert, MD

Built 2014 Load: 66.2 t ADT: 500

MD 261 (BAY AVENUE

Good

Over: BRANCH OF CHESAPEAKE BAY

0.28 MI. N OF 7TH ST., Calvert, MD

Built 2021 Load: 71.6 t ADT: 1,400

STINNETT ROAD

Good

Over: PLUM POINT CREEK

1.3 MI SOUTH OF MD 263, Calvert, MD

Built 1995 Load: 89.3 t ADT: 1,360

MD 2 & 4

Good

Over: QUAKER SWAMP

0.34 MILE SOUTH OF MD 765, Calvert, MD

Built 1987 Load: 99.9 t ADT: 26,941

HUNTINGTOWN ROAD

Good

Over: COCKTOWN CREEK

1.54 MI SW OF MD 262, Calvert, MD

Built 1996 Load: 99.9 t ADT: 1,434

MILL BRANCH ROAD

Good

Over: TRIBUTARY OF CHEW CREEK

0.1 MILES SOUTH OF MD 262, Calvert, MD

Built 1990 Load: 99.9 t ADT: 441

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

Related

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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.