County profile · official public datasets

Carroll County, MS

225 public highway bridges tracked in the FHWA National Bridge Inventory: 37.8% rated Good, 40.9% Fair, 21.3% Poor.

225
Public bridges: 37.8%
Good condition: 21.3%
Poor condition

The verdict

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

Carroll County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.

81st
of 82 on Poor share: 21.3%
Poor-condition share: 225
public highway bridges: 1981
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.

Carroll County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Carroll County ranks #81 of 82 Mississippi counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 21.3%). Carroll County, Mississippi contains 225 public highway bridges. Roughly 37.8% are rated “Good,” 40.9% “Fair,” and 21.3% “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

225

Public highway bridges in Carroll County

Good condition

37.8%

85 of 225 rated 7-9

Fair condition

40.9%

92 of 225 rated 5-6

Poor condition

21.3%

48 of 225 rated 4 or below

In-state Poor-share rank

#81 of 82

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

Condition distribution

Share of 225 NBI-tracked bridges by lowest applicable component rating.

Good

37.8% (85)

Fair

40.9% (92)

Poor

21.3% (48)

Carroll County's Poor-condition bridges carry 15,846 vehicle crossings a day

That is 6% of the county's reported daily bridge traffic on 21.3% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 330 crossings a day against 1,024 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 225 of 225 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

46.2% of Carroll County's bridges have passed the 50-year mark

104 of the 225 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 37.8% 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 23.3% of the county's Poor-condition bridge traffic

US 82 over STREAM, built 1937, carries 3,700 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 48-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 15,846 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1930s

10
1940s

5
1950s

34
1960s

35
1970s

29
1980s

16
1990s

38
2000s

30
2010s

23
2020s

5

What this shows Construction peaked in the 1990s, when 38 of the county's bridges still in the inventory were built, which is 16.9% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1981, 5 years older than the Mississippi average of 1986.

How Carroll County compares with Mississippi's closest counties by inventory size

The 5 Mississippi counties nearest Carroll County in number of bridges, with their condition splits. Its 21.3% Poor share is the 6th-lowest of these 6. Its average build year of 1981 against a peer-group mean of 1984 is in line with the group.

Showing the 5 closest of 81 Mississippi counties eligible for comparison.

Bridge inventory size and condition shares for Carroll County and the 5 Mississippi counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Panola County	231	28.6%	65.8%	5.6%	1981
Itawamba County	229	65.1%	31.4%	3.5%	1987
Attala County	228	67.5%	27.2%	5.3%	1985
Oktibbeha County	226	68.6%	27.9%	3.5%	1988
Carroll County (this page)	225	37.8%	40.9%	21.3%	1981
Clarke County	224	48.7%	44.6%	6.7%	1981

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

Similar inventory size

Nearest county inventories outside MS (225 bridges here).

Dallas County, AL · 225 bridges
Madison County, IA · 225 bridges
Mahaska County, IA · 225 bridges
Lincoln County, KS · 225 bridges

Similar average build year

Nearest mean year-built outside MS (1981 here).

Franklin County, OH · avg 1981 · 922 bridges
Greenville County, SC · avg 1981 · 635 bridges
Montgomery County, OH · avg 1981 · 632 bridges
McLean County, IL · avg 1981 · 624 bridges

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

All 225 Good 85 Fair 92 Poor 48

Good-condition bridges (85)

Sort:

Carroll County Bridge Snapshot

Condition distribution

Carroll County's Poor-condition bridges carry 15,846 vehicle crossings a day

46.2% of Carroll County's bridges have passed the 50-year mark

One structure carries 23.3% of the county's Poor-condition bridge traffic

How Carroll County compares with Mississippi's closest counties by inventory size

Nationwide counties with similar inventory size or average build year

Similar inventory size

Similar average build year

Good-condition bridges (85)

AIRPORT ROAD

CO RD 5

CO RD 100

CO RD 42

CO RD 430

SR 17

SR 430

CO RD 194

SR 430

CO RD 115

CO RD 255

CO RD 31

COUNTY ROAD 213

BOLTON ROAD

CO RD 73

COUNTY ROAD 213

CO RD 23

CO RD 66

SR 17

CO RD 183

CO RD 40

CO RD 166

CO RD 430

US 51

CO RD 183

CO RD 93

SR 17

CO RD 47

CO RD 231

CO RD 41

CO RD 124

CO RD 153

CO RD 157

CO RD 150

CO RD 241

SR 430

I 55

I 55

I 55

CO RD 8

CO RD 23

CO RD 57

CO RD 69

CO RD 104

CO RD 21

US 51

CO RD 87

CO RD 87

CO RD 87

US 51

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