County profile · official public datasets

Dinwiddie County, VA

151 public highway bridges tracked in the FHWA National Bridge Inventory: 9.3% rated Good, 82.8% Fair, 7.9% Poor.

151
Public bridges: 9.3%
Good condition: 7.9%
Poor condition

The verdict

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

Dinwiddie County posts a higher-than-median Poor-condition share among rated counties in the state across mid-size county bridge inventory.

106th
of 129 on Poor share: 7.9%
Poor-condition share: 151
public highway bridges: 1972
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.

Dinwiddie County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Dinwiddie County ranks #106 of 129 Virginia counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 7.9%). Dinwiddie County, Virginia contains 151 public highway bridges. Roughly 9.3% are rated “Good,” 82.8% “Fair,” and 7.9% “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

151

Public highway bridges in Dinwiddie County

Good condition

9.3%

14 of 151 rated 7-9

Fair condition

82.8%

125 of 151 rated 5-6

Poor condition

7.9%

12 of 151 rated 4 or below

In-state Poor-share rank

#106 of 129

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

Condition distribution

Share of 151 NBI-tracked bridges by lowest applicable component rating.

Good

9.3% (14)

Fair

82.8% (125)

Poor

7.9% (12)

Dinwiddie County's Poor-condition bridges carry 17,736 vehicle crossings a day

That is 2% of the county's reported daily bridge traffic on 7.9% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 1,478 crossings a day against 673 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 151 of 151 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

66.2% of Dinwiddie County's bridges have passed the 50-year mark

100 of the 151 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 9.3% 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 83.3% of the county's Poor-condition bridge traffic

INTERSTATE-85 NBL over CSX TRANSP ROW, built 1968, carries 14,779 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 12-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 17,736 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

3
1930s

7
1940s

3
1950s

22
1960s

60
1970s

16
1980s

9
1990s

11
2000s

10
2010s

10

What this shows Construction peaked in the 1960s, when 60 of the county's bridges still in the inventory were built, which is 39.7% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1972) matches the Virginia average (1974).

How Dinwiddie County compares with Virginia's closest counties by inventory size

The 5 Virginia counties nearest Dinwiddie County in number of bridges, with their condition splits. Its 7.9% Poor share is the 6th-lowest of these 6. Its average build year of 1972 against a peer-group mean of 1971 is in line with the group.

Showing the 5 closest of 128 Virginia counties eligible for comparison.

Bridge inventory size and condition shares for Dinwiddie County and the 5 Virginia counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Amherst County	157	38.9%	56.1%	5.1%	1972
Campbell County	153	49%	51%	0%	1979
Lee County	153	22.9%	69.3%	7.8%	1973
Brunswick County	152	23.7%	69.7%	6.6%	1969
Dinwiddie County (this page)	151	9.3%	82.8%	7.9%	1972
Grayson County	145	16.6%	78.6%	4.8%	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 Dinwiddie 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 Dinwiddie County, both outside Virginia so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside VA (151 bridges here).

Randolph County, AR · 151 bridges
Pasco County, FL · 151 bridges
St. Lucie County, FL · 151 bridges
Hall County, GA · 151 bridges

Similar average build year

Nearest mean year-built outside VA (1972 here).

Santa Clara County, CA · avg 1972 · 964 bridges
Madison County, AL · avg 1972 · 710 bridges
Kern County, CA · avg 1972 · 668 bridges
York County, PA · avg 1972 · 569 bridges

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

All 151 Good 14 Fair 125 Poor 12

All bridges (151)

Sort:

Dinwiddie County Bridge Snapshot

Condition distribution

Dinwiddie County's Poor-condition bridges carry 17,736 vehicle crossings a day

66.2% of Dinwiddie County's bridges have passed the 50-year mark

One structure carries 83.3% of the county's Poor-condition bridge traffic

How Dinwiddie County compares with Virginia's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

All bridges (151)

HILLS DRIVE

HARPERS BRIDGE RD

TRANQUILITY LANE

CLAIBORNE ROAD

BRILLS ROAD

COURTHOUSE ROAD

SQUIRREL LEVEL RD

DUNCAN ROAD

BOYDTON PLANK SBL

SUNNYSIDE ROAD

NASH ROAD

COURTHOUSE ROAD

WHITE OAK ROAD

CARSON ROAD

McKENNEY HIGHWAY

SHIPPINGS ROAD

SHIPPINGS ROAD

ROUTE 460 WBL

BOYDTON PLANK ROAD

INTERSTATE-85 SBL

ROUTE 460

RIVER ROAD

OLD BEAVER POND RD

HALLIGAN PARK RD

COURTHOUSE ROAD

TRANQUILITY LANE

QUAKER ROAD

OLD STAGE ROAD

VAUGHAN ROAD

CARSON ROAD

NAMOZINE ROAD

RAINEY ROAD

INTERSTATE-85

WHITMORE ROAD

RAINEY ROAD

WALKERS MILL ROAD

WALKERS MILL ROAD

TROUBLEFIELD ROAD

FERNDALE ROAD

WALKERS MILL ROAD

ZILLES ROAD

RTE. I-95 RAMP-H

I-95 RAMP M

WHITE OAK ROAD

CUTBANK CHURCH RD

OLD STAGE ROAD

BALTIMORE ROAD

BOYDTON PLANK ROAD

FERNDALE ROAD

COURTHOUSE ROAD

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