County profile · official public datasets

Gwinnett County, GA

317 public highway bridges tracked in the FHWA National Bridge Inventory: 89.3% rated Good, 10.7% Fair, 0% Poor.

317
Public bridges
89.3%
Good condition
0%
Poor condition

The verdict

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

Gwinnett County pairs a top-1% lowest Poor-condition share among rated counties in the state with a newer average build year than the state inventory.

Top 1%
lowest Poor share in state
0%
Poor-condition share
317
public highway bridges
1989
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.

Gwinnett County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Gwinnett County ranks #2 of 159 Georgia counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Gwinnett County, Georgia contains 317 public highway bridges. Roughly 89.3% are rated “Good,” 10.7% “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

317

Public highway bridges in Gwinnett County

Good condition

89.3%

283 of 317 rated 7-9

Fair condition

10.7%

34 of 317 rated 5-6

Poor condition

0%

0 of 317 rated 4 or below

In-state Poor-share rank

#2 of 159

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

Condition distribution

Share of 317 NBI-tracked bridges by lowest applicable component rating.

Good
89.3% (283)
Fair
10.7% (34)
Poor
0% (0)

21.1% of Gwinnett County's bridges have passed the 50-year mark

67 of the 317 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 89.3% 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.

When Gwinnett County's bridges were built

317 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 92 of the county's bridges still in the inventory were built, which is 29% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1989, 12 years newer than the Georgia average of 1977.

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

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

The 5 Georgia counties nearest Gwinnett County in number of bridges, with their condition splits. Its 0% Poor share is the 2nd-lowest of these 6. Its average build year of 1989 against a peer-group mean of 1979 is 10 years newer.

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

Bridge inventory size and condition shares for Gwinnett County and the 5 Georgia counties closest to it in inventory size
County Bridges Poor
Cobb County 414 0%
DeKalb County 392 1.5%
Gwinnett County (this page) 317 0%
Chatham County 265 1.1%
Bibb County 220 0%
Bartow County 219 2.3%

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

Similar inventory size

Nearest county inventories outside GA (317 bridges here).

Similar average build year

Nearest mean year-built outside GA (1989 here).

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

All 317 Good 283 Fair 34 Poor 0

Good-condition bridges (283)

OLD AUBURN ROAD

Good

Over: APALACHEE RIVER

1.3 MI N OF DACULA, Gwinnett, GA

Built 1970 Load: 46.2 t ADT: 1,450

BAILEY ROAD

Good

Over: APALACHEE RIVER TRIB

2 MI N OF DACULA, Gwinnett, GA

Built 2018 Load: 47.1 t ADT: 2,004

85S RAMP TO 324

Good

Over: LITTLE IVY CREEK TRIB

4.5M SE OF BUFORD, Gwinnett, GA

Built 2021 Load: 47.1 t ADT: 7,020

US 78/ SR 10

Good

Over: LITTLE HAYNES CREEK

0.6 MI E OF SNELLVILLE, Gwinnett, GA

Built 1929 Load: 49.8 t ADT: 38,400

SR 20 (EBL)

Good

Over: IVY CREEK

2 MI S OF BUFORD, Gwinnett, GA

Built 1999 Load: 49.8 t ADT: 50,800

US 78 / SR 10

Good

Over: BIG HAYNES CREEK

1.5 MI E OF SNELLVILLE, Gwinnett, GA

Built 1928 Load: 50.8 t ADT: 38,400

DACULA ROAD

Good

Over: CSX RAILROAD

IN DACULA, Gwinnett, GA

Built 2021 Load: 50.8 t ADT: 15,900

316 E/B & W/B HOV

Good

Over: I-85 NBCD

3.3 MI SE DULUTH, Gwinnett, GA

Built 2008 Load: 58.0 t ADT: 2,410

SR 8 - US 29

Good

Over: APALACHEE RIVER

2 MI NE OF DACULA, Gwinnett, GA

Built 1933 Load: 76.2 t ADT: 12,400

SR 124

Good

Over: YELLOW RIVER TRIB

2 MI S OF LAWRENCEVILLE, Gwinnett, GA

Built 1939 Load: 87.0 t ADT: 40,100

SR 20 - US 23

Good

Over: SUWANEE CREEK

IN SOUTH BUFORD, Gwinnett, GA

Built 1965 Load: 99.9 t ADT: 56,100

SR 84

Good

Over: BIG HAYNES CREEK

1 MI NE OF SNELLVILLE, Gwinnett, GA

Built 1959 Load: 99.9 t ADT: 8,950

DULUTH HIGHWAY

Good

Over: KNOX BRANCH

1 MI SE OF DULUTH, Gwinnett, GA

Built 1939 Load: 99.9 t ADT: 18,300

MT GRAVEL SPNGS RD

Good

Over: IVY CREEK

3.4 MI SE OF BUFORD, Gwinnett, GA

Built 1972 Load: 99.9 t ADT: 30,800

I-85

Good

Over: BROMOLOW CREEK

3.4 MI E OF NORCROSS, Gwinnett, GA

Built 1958 Load: 99.9 t ADT: 297,000

I-85

Good

Over: LITTLE IVY CREEK

4.3 MI SE OF BUFORD, Gwinnett, GA

Built 1962 Load: 99.9 t ADT: 131,000

I-85

Good

Over: WHEELER CREEK

9.4 MI E OF BUFORD, Gwinnett, GA

Built 1964 Load: 99.9 t ADT: 90,300

JIMMY CARTER BLVD

Good

Over: JACKSON CREEK

2.5 MI SW OF LILBURN, Gwinnett, GA

Built 1977 Load: 99.9 t ADT: 30,500

FIVE FORKS TRICKUM

Good

Over: GARNER CREEK

4 MI SE OF LILBURN, Gwinnett, GA

Built 1955 Load: 99.9 t ADT: 19,308

CRESCENT DRIVE

Good

Over: NORTH PTREE CRK TRIB

2 MI S OF NORCROSS, Gwinnett, GA

Built 1971 Load: 99.9 t ADT: 5,880

SR 316

Good

Over: ALCOVY RIVER

3.2 MI N OF LAWRENCEVILLE, Gwinnett, GA

Built 1982 Load: 99.9 t ADT: 54,400

SR 20 - US 23

Good

Over: SUWANEE CREEK TRIB

IN SOUTH BUFORD, Gwinnett, GA

Built 1965 Load: 99.9 t ADT: 50,300

SETTLES BRIDGE ROA

Good

Over: LEVEL CREEK

2.5 MI NW OF SUWANEE, Gwinnett, GA

Built 1982 Load: 99.9 t ADT: 140

JIM MOORE ROAD

Good

Over: LITTLE MULBERRY RIVER

4.5 MI N OF DACULA, Gwinnett, GA

Built 1989 Load: 99.9 t ADT: 5,570

CENTERVILL-ROSEBUD

Good

Over: NO BUSINESS CREEK

3.7 MI S OF SNELLVILLE, Gwinnett, GA

Built 1986 Load: 99.9 t ADT: 13,200

LAKE LUCRENE RD

Good

Over: POUNDS CREEK

4.2 MI SW OF SNELLVILLE, Gwinnett, GA

Built 1973 Load: 99.9 t ADT: 8,530

SATELLITE BLVD.

Good

Over: BROMOLOW CREEK TRIB

2.3 MI E OF NORCROSS, Gwinnett, GA

Built 1985 Load: 99.9 t ADT: 19,500

HAMILTON MILL RD

Good

Over: SUWANEE CREEK

IN BUFORD, Gwinnett, GA

Built 1997 Load: 99.9 t ADT: 19,400

L-VILLE-SUWANEE RD

Good

Over: REDLAND CREEK

1.4 MI W OF LAWRENCEVILLE, Gwinnett, GA

Built 1999 Load: 99.9 t ADT: 24,300

LITTLE MILL ROAD

Good

Over: RICHLAND CREEK.

WEST SIDE OF BUFORD, Gwinnett, GA

Built 1999 Load: 99.9 t ADT: 5,590

RUSSELL ROAD

Good

Over: LITTLE SUWANEE CREEK

3.3 MI N OF LAWRENCEVILLE, Gwinnett, GA

Built 2005 Load: 99.9 t ADT: 7,820

I-85 NB & SB NBCD

Good

Over: FORK CREEK

2 MI EAST OF DULUTH, Gwinnett, GA

Built 1990 Load: 99.9 t ADT: 162,000

LUKE EDWARDS ROAD

Good

Over: PALM CREEK TRIBUTARY

5.8 MI S OF DACULA, Gwinnett, GA

Built 2016 Load: 99.9 t ADT: 2,004

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

Related

Browse all → | Rankings →
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.