County profile · official public datasets

Clayton County, GA

168 public highway bridges tracked in the FHWA National Bridge Inventory: 82.7% rated Good, 16.1% Fair, 1.2% Poor.

168
Public bridges: 82.7%
Good condition: 1.2%
Poor condition

The verdict

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

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

87th
of 159 on Poor share: 1.2%
Poor-condition share: 168
public highway bridges: 1982
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.

Clayton County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Clayton County ranks #87 of 159 Georgia counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 1.2%). Clayton County, Georgia contains 168 public highway bridges. Roughly 82.7% are rated “Good,” 16.1% “Fair,” and 1.2% “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

168

Public highway bridges in Clayton County

Good condition

82.7%

139 of 168 rated 7-9

Fair condition

16.1%

27 of 168 rated 5-6

Poor condition

1.2%

2 of 168 rated 4 or below

In-state Poor-share rank

#87 of 159

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

Condition distribution

Share of 168 NBI-tracked bridges by lowest applicable component rating.

Good

82.7% (139)

Fair

16.1% (27)

Poor

1.2% (2)

Clayton County's Poor-condition bridges carry 37,004 vehicle crossings a day

That is 0.8% of the county's reported daily bridge traffic on 1.2% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 18,502 crossings a day against 29,857 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 168 of 168 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

31.5% of Clayton County's bridges have passed the 50-year mark

53 of the 168 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 82.7% 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 94.6% of the county's Poor-condition bridge traffic

I-285 RAMP over I-285 RAMP TO I-75 SBL, built 1959, carries 35,000 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 2-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 37,004 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

1920s

1
1930s

1
1940s

3
1950s

17
1960s

25
1970s

20
1980s

58
1990s

16
2000s

11
2010s

11
2020s

5

What this shows Construction peaked in the 1980s, when 58 of the county's bridges still in the inventory were built, which is 34.5% of those with a recorded year. That cohort is now 35 to 44 years old in the 2024 inventory. Its average build year is 1982, 5 years newer than the Georgia average of 1977.

How Clayton County compares with Georgia's closest counties by inventory size

The 5 Georgia counties nearest Clayton County in number of bridges, with their condition splits. Its 1.2% Poor share is the 5th-lowest of these 6. Its average build year of 1982 against a peer-group mean of 1980 is in line with the group.

Showing the 5 closest of 158 Georgia counties eligible for comparison.

Bridge inventory size and condition shares for Clayton County and the 5 Georgia counties closest to it in inventory size
County	Bridges	Good	Fair	Poor	Avg. built
Coweta County	173	80.3%	19.1%	0.6%	1988
Laurens County	169	69.8%	26.6%	3.6%	1972
Carroll County	168	72.6%	26.8%	0.6%	1977
Troup County	168	73.8%	25.6%	0.6%	1980
Clayton County (this page)	168	82.7%	16.1%	1.2%	1982
Cherokee County	164	84.8%	15.2%	0%	1985

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

Similar inventory size

Nearest county inventories outside GA (168 bridges here).

Wilcox County, AL · 168 bridges
Kings County, CA · 168 bridges
Clarke County, IA · 168 bridges
Greene County, IA · 168 bridges

Similar average build year

Nearest mean year-built outside GA (1982 here).

Oklahoma County, OK · avg 1982 · 1,216 bridges
Jackson County, MO · avg 1982 · 930 bridges
Milwaukee County, WI · avg 1982 · 893 bridges
Champaign County, IL · avg 1982 · 727 bridges

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

All 168 Good 139 Fair 27 Poor 2

Good-condition bridges (139)

Sort:

Clayton County Bridge Snapshot

Condition distribution

Clayton County's Poor-condition bridges carry 37,004 vehicle crossings a day

31.5% of Clayton County's bridges have passed the 50-year mark

One structure carries 94.6% of the county's Poor-condition bridge traffic

How Clayton County compares with Georgia'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 (139)

I-85 (SBL RAMP)

WINDSOR DRIVE

OLD DIXIE HWY

I-285 (WBL RAMP)

Emerald Drive

LOOP ROAD

GARDENWALK BLVD

EAST CONLEY ROAD

CR 1817 AIRPORT BL

GILBERT ROAD

I-285 (EBL RAMP)

I-675 (SBL)

SR 314

AIRPORT ROAD

MCDONOUGH ROAD

FLINT RIVER ROAD

CR917 N TERMINAL L

CR517 S TERMINAL C

SR 139

I-285 RAMP

N TERMINAL LOOP

KING ROAD

I-85

FLINT RIVER ROAD

LEES MILL ROAD

SR 139

SR 331

I-75

I-75

I-75

R I-285W TO I-75S&

LP RD RAMP TO I-75

I-75 R TO LP RD &

ELLENWOOD ROAD

I-675

I-675

I-675

I-675

EVANS DRIVE

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