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)

85 NBCD (40310N)

Good

Over: 85 NB RAMP TO OLD PEACH

2 MI EAST OF DULUTH, Gwinnett, GA

Built 2008 Load: 29.9 t ADT: 35,600

INDIAN TRAIL ROAD

Good

Over: I-85- M-9317 RAMP

2 MI E OF NORCROSS, Gwinnett, GA

Built 1983 Load: 30.8 t ADT: 33,700

STONE MTN FREEWAY

Good

Over: SR 10 RMP - CR 2560

7 MI E OF SNELLVILLE, Gwinnett, GA

Built 1995 Load: 30.8 t ADT: 64,100

SR 20 - US 23

Good

Over: SR 419 (I-985)

2.25 MI SE OF BUFORD, Gwinnett, GA

Built 1999 Load: 30.8 t ADT: 33,440

HAMILTON MILL RD

Good

Over: I-85 (SR 403)

4.8 MI SE OF BUFORD, Gwinnett, GA

Built 2001 Load: 30.8 t ADT: 38,200

INDIAN TRAIL ROAD

Good

Over: BEAVER RUIN CREEK

2.6 MI E OF NORCROSS, Gwinnett, GA

Built 1985 Load: 31.7 t ADT: 38,300

ARNOLD ROAD

Good

Over: YELLOW RIVER

4.5 MI SW OF LAWRENCEVLLE, Gwinnett, GA

Built 1983 Load: 31.7 t ADT: 2,004

I-85 S TO SR 20 E

Good

Over: IVY CREEK

3 MI S OF BUFORD, Gwinnett, GA

Built 1999 Load: 31.7 t ADT: 5,950

BERKLEY LAKE ROAD

Good

Over: NS RAILROAD

2.1 MI SE OF DULUTH, Gwinnett, GA

Built 2007 Load: 31.7 t ADT: 19,700

SR 316 RAMP

Good

Over: I-85 I-85 NBCD & SBCD

2 MILES SE OF DULUTH, Gwinnett, GA

Built 2007 Load: 31.7 t ADT: 10,200

SR 120

Good

Over: WOLF CREEK

1.5 MI NW OF LAWRENCEVILL, Gwinnett, GA

Built 1974 Load: 32.6 t ADT: 24,300

SR 120

Good

Over: SR 316

0.5 MI W OF LAWRENCEVILLE, Gwinnett, GA

Built 1960 Load: 32.6 t ADT: 22,020

PEACHTREE PARKWAY

Good

Over: CHATTAHOOCHEE RIVER

1.5 MI NW OF BERKELY LAKE, Gwinnett, GA

Built 1955 Load: 32.6 t ADT: 44,500

SR 316 & 316 EB RA

Good

Over: FORK CREEK

7.2 MI W OF LAWRENCEVILLE, Gwinnett, GA

Built 1960 Load: 32.6 t ADT: 105,000

SR 316

Good

Over: FORK CREEK TRIB

7.4 MI W OF LAWRENCEVILLE, Gwinnett, GA

Built 1960 Load: 32.6 t ADT: 105,000

I-85

Good

Over: BEAVER RUIN CREEK

2 MI SE OF NORCROSS, Gwinnett, GA

Built 1959 Load: 32.6 t ADT: 295,000

I-85

Good

Over: LITTLE IVY CREEK

4 MI SE OF BUFORD, Gwinnett, GA

Built 1962 Load: 32.6 t ADT: 90,300

OLD NORCROSS ROAD

Good

Over: SWEETWATER CREEK

6.5 MI SE OF DULUTH, Gwinnett, GA

Built 1978 Load: 32.6 t ADT: 24,800

ROSEBUD ROAD

Good

Over: BRUSHY FORK CREEK

5 MI SE OF SNELLVILLE, Gwinnett, GA

Built 1990 Load: 32.6 t ADT: 15,105

LVILLE-SUWANEE RD

Good

Over: YELLOW RIVER

2.5 MI N OF LAWRENCEVILLE, Gwinnett, GA

Built 1989 Load: 32.6 t ADT: 33,500

PLEASANT HILL RD S

Good

Over: CHATTAHOOCHEE RIVER

FULTON-GWINNETT CO LINE, Gwinnett, GA

Built 1972 Load: 32.6 t ADT: 33,440

FIVE FORKS TRICKUM

Good

Over: BANSTON CREEK

4.5 MI SW OF LAWRENCEVILL, Gwinnett, GA

Built 1978 Load: 32.6 t ADT: 19,000

FIVE FORKS TRICKUM

Good

Over: PUGHS CREEK

4 MI SW OF LAWRENCEVILLE, Gwinnett, GA

Built 1978 Load: 32.6 t ADT: 19,000

HARMONY GROVE CH R

Good

Over: CAMP CREEK

2 MI S OF LILBURN, Gwinnett, GA

Built 1970 Load: 32.6 t ADT: 4,290

KILLIAN HILL ROAD

Good

Over: CAMP CREEK

IN LILBURN, Gwinnett, GA

Built 1981 Load: 32.6 t ADT: 18,700

CAMP CREEK ROAD

Good

Over: CAMP CREEK

IN LILBURN, Gwinnett, GA

Built 1985 Load: 32.6 t ADT: 4,590

SR 120

Good

Over: FORK CREEK

3.4 MI SE OF DULUTH, Gwinnett, GA

Built 1960 Load: 32.6 t ADT: 19,800

BEAVER RUIN ROAD

Good

Over: I-85

2.8 MI N OF NORCROSS, Gwinnett, GA

Built 1987 Load: 32.6 t ADT: 35,200

STEVE REYNOLDS BLV

Good

Over: I-85

3.8 MI S OF DULUTH, Gwinnett, GA

Built 1986 Load: 32.6 t ADT: 2,004

JONES MILL ROAD

Good

Over: SR 141- 2 SR 141 RAMPS

2 MI W OF NORCROSS, Gwinnett, GA

Built 1988 Load: 32.6 t ADT: 16,700

BOGGS ROAD

Good

Over: FORK CREEK

6.5 MI SE OF DULUTH, Gwinnett, GA

Built 1987 Load: 32.6 t ADT: 22,500

BEAVER RUIN ROAD

Good

Over: BEAVER RUIN CREEK

2.8 MI N OF LILBURN, Gwinnett, GA

Built 1991 Load: 32.6 t ADT: 35,200

RONALD REAGAN PKWY

Good

Over: CR 335 WEBB GIN HOUSE RD

4.2 MI E OF LILBURN, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 46,800

RONALD REAGAN PKWY

Good

Over: YELLOW RIVER TRIB

3.5 MI E OF LILBURN, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 58,800

RONALD REAGAN PKWY

Good

Over: YELLOW RIVER TRIB

2.8 MI E OF LILBURN, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 58,800

RONALD REAGAN PKWY

Good

Over: M-9371 OAK ROAD

3.2 MI T OF LILBURN, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 58,800

RONALD REAGAN PKWY

Good

Over: YELLOW RIVER

3 MI E OF LILBURN, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 58,800

RONALD REAGAN PKWY

Good

Over: YELLOW RIVER TRIB

2.0 MI NE OF LILBURN, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 58,800

BETHESDA CHURCH RD

Good

Over: CR7238 RONALD REAGAN PKY

1.8 MI NE OF LILBURN, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 5,830

RAMP TO SR 8 NBL

Good

Over: SWEETWATER CREEK

1.5 MI N OF LILBURN, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 5,730

RAMP TO SR 864 SBL

Good

Over: SWEETWATER CREEK

1.5 MI N OF LILBURN, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 5,730

US 29- SR8

Good

Over: CR7238RONALD REAGAN PKY

1.5 MI N OF LILBURN, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 44,400

RONALD REAGAN PWY

Good

Over: PLEASANT HILL RD

1.5 MI N OF LILBURN, Gwinnett, GA

Built 1993 Load: 32.6 t ADT: 41,900

ROGERS BRIDGE ROAD

Good

Over: NS RAILROAD

DULUTH - EAST SECTION, Gwinnett, GA

Built 1994 Load: 32.6 t ADT: 11,100

LEVEL CREEK ROAD

Good

Over: LEVEL CREEK

1.8 MI S OF SUGAR HILL, Gwinnett, GA

Built 1995 Load: 32.6 t ADT: 2,004

COLLINS HILL ROAD

Good

Over: LITTLE SUWANEE CREEK

3.8 MI SE OF SUWANEE, Gwinnett, GA

Built 1989 Load: 32.6 t ADT: 10,600

HAMILTON MILL LANE

Good

Over: IVY CREEK

2.2 MI E OF BUFORD, Gwinnett, GA

Built 1980 Load: 32.6 t ADT: 680

SUNNY HILL ROAD

Good

Over: LITTLE IVY CREEK

4.4 MI SE OF BUFORD, Gwinnett, GA

Built 1992 Load: 32.6 t ADT: 4,820

INDIAN SHOALS RD

Good

Over: CEDAR CREEK

5.8 MI S OF DACULA, Gwinnett, GA

Built 1992 Load: 32.6 t ADT: 2,280

PAPER MILL ROAD

Good

Over: SHOAL CREEK

2.2 MI E OF LAWRENCEVILLE, Gwinnett, GA

Built 1989 Load: 32.6 t ADT: 2,004

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.