County profile · official public datasets

Copiah County, MS

266 public highway bridges tracked in the FHWA National Bridge Inventory: 25.9% rated Good, 69.2% Fair, 4.9% Poor.

266
Public bridges
25.9%
Good condition
4.9%
Poor condition

The verdict

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

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

Top 50%
lowest Poor share in state
4.9%
Poor-condition share
266
public highway bridges
1987
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.

Copiah County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Copiah County ranks #41 of 82 Mississippi counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 4.9%). Copiah County, Mississippi contains 266 public highway bridges. Roughly 25.9% are rated “Good,” 69.2% “Fair,” and 4.9% “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

266

Public highway bridges in Copiah County

Good condition

25.9%

69 of 266 rated 7-9

Fair condition

69.2%

184 of 266 rated 5-6

Poor condition

4.9%

13 of 266 rated 4 or below

In-state Poor-share rank

#41 of 82

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

Condition distribution

Share of 266 NBI-tracked bridges by lowest applicable component rating.

Good
25.9% (69)
Fair
69.2% (184)
Poor
4.9% (13)

Copiah County's Poor-condition bridges carry 53,920 vehicle crossings a day

That is 13.2% of the county's reported daily bridge traffic on 4.9% of its bridges: Poor-condition structures carry more traffic than their share of the inventory. Each Poor bridge averages 4,148 crossings a day against 530 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 266 of 266 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

36.8% of Copiah County's bridges have passed the 50-year mark

98 of the 266 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 25.9% 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 26.9% of the county's Poor-condition bridge traffic

I 55 over CLEAR CREEK ROAD, built 1963, carries 14,500 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 53,920 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Copiah County's bridges were built

266 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 65 of the county's bridges still in the inventory were built, which is 24.4% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year (1987) matches the Mississippi average (1986).

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

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

The 5 Mississippi counties nearest Copiah County in number of bridges, with their condition splits. Its 4.9% Poor share is the 4th-lowest of these 6. Its average build year of 1987 against a peer-group mean of 1991 is in line with the group.

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

Bridge inventory size and condition shares for Copiah County and the 5 Mississippi counties closest to it in inventory size
County Bridges Poor
Bolivar County 272 8.1%
Yazoo County 271 12.5%
Jackson County 268 2.6%
DeSoto County 266 1.9%
Copiah County (this page) 266 4.9%
Lafayette County 259 4.2%

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

Similar inventory size

Nearest county inventories outside MS (266 bridges here).

Similar average build year

Nearest mean year-built outside MS (1987 here).

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

All 266 Good 69 Fair 184 Poor 13

Fair-condition bridges (184)

COUNTY FARM ROAD

Fair

Over: I 55

10.9 MI N LINCOLN CL, Copiah, MS

Built 1965 Load: 39.7 t ADT: 30

MILLERSTHAZELHURST

Fair

Over: CREEK

SEC 10 T10N R 8E, Copiah, MS

Built 2015 Load: 40.2 t ADT: 700

I 55

Fair

Over: GALLMAN ROAD

6.5 MI S SR 27, Copiah, MS

Built 1963 Load: 41.7 t ADT: 14,000

I 55

Fair

Over: GALLMAN ROAD

6.5 MI S SR 27, Copiah, MS

Built 1963 Load: 41.7 t ADT: 14,000

I 55

Fair

Over: HENRY ROAD

0.5 MI S HINDS CL, Copiah, MS

Built 1960 Load: 42.1 t ADT: 15,500

I 55

Fair

Over: HENRY ROAD

0.5 MI S HINDS CL, Copiah, MS

Built 1960 Load: 42.1 t ADT: 15,500

SR 27

Fair

Over: WHITE OAK CREEK

1.6 MI N I 55, Copiah, MS

Built 1959 Load: 42.1 t ADT: 3,300

OLD PORT GIBSON RD

Fair

Over: MILL CREEK

SEC 2 T10N R 7E B, Copiah, MS

Built 1991 Load: 42.4 t ADT: 720

VARDAMAN ROAD

Fair

Over: FOSTER CREEK BCH

SEC 12 T10N R 5E, Copiah, MS

Built 2018 Load: 42.9 t ADT: 40

BARKER ROAD

Fair

Over: I 55 LEFT LANE

2.4 MI N SR 28, Copiah, MS

Built 1963 Load: 43.8 t ADT: 90

MILLER ROAD

Fair

Over: I 55 RIGHT LANE

2.4 MI N SR 28, Copiah, MS

Built 1963 Load: 43.8 t ADT: 90

I 55

Fair

Over: SR 27

I 55 OVER SR 27, Copiah, MS

Built 1960 Load: 44.1 t ADT: 12,000

SR 28

Fair

Over: UNNAMED STREAM

1.4 MI E SR 547, Copiah, MS

Built 1950 Load: 44.1 t ADT: 1,700

BEAR CREEK ROAD

Fair

Over: WHITE OAK CREEK

SEC 4 T 2N R 3W, Copiah, MS

Built 2021 Load: 45.0 t ADT: 240

MILLER LANE

Fair

Over: TRIB TO BAYOU PIERRE

SEC 24 T 9N R 7E, Copiah, MS

Built 2005 Load: 45.2 t ADT: 60

SUGARFARM RD

Fair

Over: TRIB TO PEGIES CREEK

SEC 7 T 9N R21W, Copiah, MS

Built 2006 Load: 45.2 t ADT: 60

I 55

Fair

Over: CLINE ROAD

6.5 MI N LINCOLN CL, Copiah, MS

Built 1966 Load: 45.4 t ADT: 11,500

I 55

Fair

Over: CLINE ROAD

5.4 MI N LINCOLN CL, Copiah, MS

Built 1966 Load: 45.4 t ADT: 11,500

BETHEL LANE

Fair

Over: LICK CREEK

SEC 12 T10N R 9E, Copiah, MS

Built 1994 Load: 46.5 t ADT: 10

COUNTY FARM ROAD

Fair

Over: JONES CREEK BCH

SEC 30 T10N R 8E, Copiah, MS

Built 2009 Load: 47.6 t ADT: 50

I 55

Fair

Over: SR 27

I 55 OVER SR 27, Copiah, MS

Built 1960 Load: 49.4 t ADT: 12,000

COLONEL NEILL RD

Fair

Over: UNNAMED BRANCH

SEC 30 T 2N R 3W, Copiah, MS

Built 2005 Load: 49.7 t ADT: 110

TERRY-GVILLE RD.

Fair

Over: HALEY CREEK

SEC 13 T 2N R 1W B, Copiah, MS

Built 1960 Load: 52.5 t ADT: 540

CURTIS RD

Fair

Over: ANDING BRANCH

SEC 34 T10N R 8E, Copiah, MS

Built 2016 Load: 53.1 t ADT: 50

ROCKPORT RD

Fair

Over: INDIAN CREEK

SEC 33 T10N R10E B, Copiah, MS

Built 2000 Load: 53.8 t ADT: 80

JAMES LANE

Fair

Over: ANDING BRANCH

SEC 2 T 9N R 8E B, Copiah, MS

Built 2007 Load: 54.4 t ADT: 60

ST.PAUL ROAD

Fair

Over: TRIB TO HOMOCHITO RIVER

SEC 33 T 9N R 5E B, Copiah, MS

Built 2010 Load: 54.5 t ADT: 140

GALLATIN STREET

Fair

Over: I 55

12.0 MI N LINCOLN CL, Copiah, MS

Built 1965 Load: 57.0 t ADT: 400

SYLVARENA ROAD

Fair

Over: I 55

2.5 MI N LINCOLN CL, Copiah, MS

Built 1966 Load: 58.2 t ADT: 1,200

MARTINSVILLE ROAD

Fair

Over: I 55

8.5 MI N LINCOLN CL, Copiah, MS

Built 1965 Load: 58.2 t ADT: 810

OLD SR 27

Fair

Over: I 55

1.5 MI S SR 27, Copiah, MS

Built 1960 Load: 62.4 t ADT: 1,900

ALFORD RD

Fair

Over: TRIB TO LITTLE COPIAH CK

SEC 9 T 1N R 1W, Copiah, MS

Built 2009 Load: 71.5 t ADT: 80

I 55

Fair

Over: SPRING BRANCH

0.6 MI S SR 27, Copiah, MS

Built 1960 Load: 99.9 t ADT: 12,000

I 55

Fair

Over: SPRING BRANCH

0.6 MI S SR 27, Copiah, MS

Built 1960 Load: 99.9 t ADT: 12,000

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.