County profile · official public datasets

Cobb County, GA

414 public highway bridges tracked in the FHWA National Bridge Inventory: 89.1% rated Good, 10.9% Fair, 0% Poor.

414
Public bridges
89.1%
Good condition
0%
Poor condition

The verdict

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

Cobb 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
414
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.

Cobb County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Cobb County ranks #1 of 159 Georgia counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 0%). Cobb County, Georgia contains 414 public highway bridges. Roughly 89.1% are rated “Good,” 10.9% “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

414

Public highway bridges in Cobb County

Good condition

89.1%

369 of 414 rated 7-9

Fair condition

10.9%

45 of 414 rated 5-6

Poor condition

0%

0 of 414 rated 4 or below

In-state Poor-share rank

#1 of 159

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

Condition distribution

Share of 414 NBI-tracked bridges by lowest applicable component rating.

Good
89.1% (369)
Fair
10.9% (45)
Poor
0% (0)

31.2% of Cobb County's bridges have passed the 50-year mark

129 of the 414 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 89.1% 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 Cobb County's bridges were built

414 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1990s, when 89 of the county's bridges still in the inventory were built, which is 21.5% of those with a recorded year. That cohort is now 25 to 34 years old in the 2024 inventory. Its average build year is 1987, 10 years newer than the Georgia average of 1977.

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

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

The 5 Georgia counties nearest Cobb County in number of bridges, with their condition splits. Its 0% Poor share is the 1st-lowest of these 6. Its average build year of 1987 against a peer-group mean of 1979 is 8 years newer.

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

Bridge inventory size and condition shares for Cobb County and the 5 Georgia counties closest to it in inventory size
County Bridges Poor
Cobb County (this page) 414 0%
DeKalb County 392 1.5%
Gwinnett County 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 Cobb 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 Cobb County, both outside Georgia so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside GA (414 bridges here).

Similar average build year

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

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

All 414 Good 369 Fair 45 Poor 0

Good-condition bridges (369)

DUE WEST ROAD

Good

Over: ALLATOONA CREEK

6 MILES SOUTH WEST OF KEN, Cobb, GA

Built 1993 Load: 32.6 t ADT: 10,700

NORTH LANDING WAY

Good

Over: RUBES CREEK TRIB.

8 MILES NORTH EAST OF KEN, Cobb, GA

Built 1993 Load: 32.6 t ADT: 610

WILLOW CREEK DRIVE

Good

Over: RUBES CREEK TRIB.

7.2 MILES NORTH EAST OF K, Cobb, GA

Built 1983 Load: 32.6 t ADT: 880

BUSBEE PARKWAY

Good

Over: NOONDAY CREEK

2.5 MILES EAST OF KENNESA, Cobb, GA

Built 1985 Load: 32.6 t ADT: 8,673

LAUREL BRIDGE DRIV

Good

Over: NICKAJACK CREEK TRIB

IN SE SMYRNA, Cobb, GA

Built 1986 Load: 32.6 t ADT: 2,004

PAUL SAMUEL ROAD

Good

Over: ALLATOONA CREEK TRIB.

3.8 MILES SOUTH WEST OF K, Cobb, GA

Built 1990 Load: 32.6 t ADT: 2,004

NEW CHASTAIN RD EB

Good

Over: NOONDAY CREEK

4.4 MILES EAST OF KENNESA, Cobb, GA

Built 1993 Load: 32.6 t ADT: 19,200

STEINHAUER ROAD

Good

Over: RUBES CREEK TRIB.

8 MI E OF KENNESAW, Cobb, GA

Built 1995 Load: 32.6 t ADT: 2,210

KURTZ ROAD

Good

Over: NOONDAY CREEK TRIB.

4.7 MI SE OF KENNESAW, Cobb, GA

Built 1996 Load: 32.6 t ADT: 1,140

STILESBORO ROAD

Good

Over: NOONDAY CREEK

2.9 MI S OF KENNESAW, Cobb, GA

Built 1996 Load: 32.6 t ADT: 11,300

BULLARD ROAD

Good

Over: MUD CREEK TRIB

7.2 MI W OF MARIETTA, Cobb, GA

Built 1997 Load: 32.6 t ADT: 2,004

FRIENDSHIP CHURCH

Good

Over: MUD CREEK TRIB.

6 MILES SOUTH WEST OF MAR, Cobb, GA

Built 1997 Load: 32.6 t ADT: 2,004

GILES ROAD

Good

Over: PROCTOR CREEK

1.7 MILES NORTH WEST OF K, Cobb, GA

Built 1997 Load: 32.6 t ADT: 16,700

BARRETT PARKWAY

Good

Over: NOONDAY CREEK

2.9 MILES SOUTH OF KENNES, Cobb, GA

Built 1996 Load: 32.6 t ADT: 46,300

OLD CONCORD ROAD

Good

Over: E FORK NICKAJACK CREEK

1 MILES WEST OF SMYRNA, Cobb, GA

Built 1997 Load: 32.6 t ADT: 2,004

MOON ROAD

Good

Over: POWDER SPRINGS CREEK

3 MILES WEST OF POWDER SP, Cobb, GA

Built 1997 Load: 32.6 t ADT: 2,004

OLD DALLAS ROAD

Good

Over: MUD CREEK

5.5 MILES SOUTH OF KENNES, Cobb, GA

Built 1997 Load: 32.6 t ADT: 920

SOUTH HURT ROAD

Good

Over: EAST/WEST CONNECTOR

3 MI. SW OF SMYRNA, Cobb, GA

Built 1997 Load: 32.6 t ADT: 2,340

CONCORD ROAD

Good

Over: M-9034 E-W CONNECTOR

3 MILES SOUTH WEST OF SMY, Cobb, GA

Built 1997 Load: 32.6 t ADT: 6,400

EAST-WEST CONNECTO

Good

Over: ABANDONED RAILROAD

3.1 MILES SOUTH OF SMYRNA, Cobb, GA

Built 1997 Load: 32.6 t ADT: 33,440

MOUNT WILKINSON PA

Good

Over: I-285

3.8 MI. SE OF SMYRNA, Cobb, GA

Built 1998 Load: 32.6 t ADT: 2,004

JEFFERSON ST CONN

Good

Over: SR 5 CS 340 RAILROAD

IN AUSTELL CITY LIMITS, Cobb, GA

Built 1998 Load: 32.6 t ADT: 4,890

I-75 RAMP TO KENNE

Good

Over: FILL AREA TO UPPER ROAD

7.3 MI SE OF MARIETTA, Cobb, GA

Built 1998 Load: 32.6 t ADT: 7,630

WINDY RIDGE PARKWA

Good

Over: I-75 AND RAMPS

3 MI. EAST OF SMYRNA, Cobb, GA

Built 1998 Load: 32.6 t ADT: 15,105

I-75 RAMP

Good

Over: I-75R TO I-285

7.1 MI SE OF MARRIETTA, Cobb, GA

Built 1998 Load: 32.6 t ADT: 2,060

I-75R / KENNDY PKW

Good

Over: I-285R TO I-75 & K. PKWY

7.1 MI SE OF MARRIETTA, Cobb, GA

Built 1998 Load: 32.6 t ADT: 4,040

CUMBERLAND BLVD.

Good

Over: I-75

7.1 MI SE OF MARIETTA, Cobb, GA

Built 1997 Load: 32.6 t ADT: 15,105

AKERS MILL ROAD

Good

Over: I-75 NBL AND RAMPS

7 MI SE OF MARIETTA, Cobb, GA

Built 1998 Load: 32.6 t ADT: 15,105

CUIMBERLAND BOULEV

Good

Over: ROTTENWOOD CREEK

6.7 MI SE OF MARIETTA, Cobb, GA

Built 1998 Load: 32.6 t ADT: 15,105

AKERS MILL ROAD

Good

Over: I-75 SBL AND RAMP

7 MI. SE OF MARIETTA, Cobb, GA

Built 1998 Load: 32.6 t ADT: 15,105

COOPER LAKE ROAD

Good

Over: LAUREL BRANCH

2.5 MILES SOUTH OF SMYRNA, Cobb, GA

Built 1999 Load: 32.6 t ADT: 5,860

BUCKNER ROAD

Good

Over: NICKAJACK CREEK

4.2 MILES SOUTH OF SMYRNA, Cobb, GA

Built 1999 Load: 32.6 t ADT: 2,004

BLACKWELL ROAD

Good

Over: LITTLE NOONDAY CREEK

5.5 MI E OF KENNESAW, Cobb, GA

Built 1999 Load: 32.6 t ADT: 8,260

BLACKWELL ROAD

Good

Over: RUBES CREEK

7 MI E OF KENNESAW, Cobb, GA

Built 1999 Load: 32.6 t ADT: 8,260

BROWNSVILLE ROAD

Good

Over: SWEETWATER CREEK

5 MILES WEST OF AUSTELL, Cobb, GA

Built 1998 Load: 32.6 t ADT: 15,105

CHEROKEE STREET

Good

Over: TANYARD CREEK

IN ACWORTH, Cobb, GA

Built 1999 Load: 32.6 t ADT: 3,960

RIO MONTANA DRIVE

Good

Over: LITTLE NOONDAY CREEK

5.8 MI E OF KENNESAW, Cobb, GA

Built 1999 Load: 32.6 t ADT: 2,004

POPLAR SPRINGS RD

Good

Over: POWDER SPRINGS CREEK

ON COBB / PAULDING CO. LI, Cobb, GA

Built 1998 Load: 32.6 t ADT: 2,570

ROBINSON ROAD

Good

Over: SOPE CREEK

5.6 MI E OF MARIETTA, Cobb, GA

Built 1998 Load: 32.6 t ADT: 2,004

INTERST NORTH PARK

Good

Over: ROTTENWOOD CREEK

6.7 MILES SOUTH EAST OF M, Cobb, GA

Built 1999 Load: 32.6 t ADT: 15,105

E/W CONNECTOR

Good

Over: I-285

3.2 MI SE OF SMYRNA, Cobb, GA

Built 2001 Load: 32.6 t ADT: 20,500

HOLLOMAN ROAD

Good

Over: SWEETWATER CREEK TRIB.

3.4 MI E OF AUSTELL, Cobb, GA

Built 2001 Load: 32.6 t ADT: 2,004

CUNNINGHAM ROAD

Good

Over: OLLEY CREEK

3.2 MI S OF MARIETTA, Cobb, GA

Built 2001 Load: 32.6 t ADT: 2,004

OLD DALLAS ROAD

Good

Over: NOSES CREEK

4.1 MI W OF MARIETTA, Cobb, GA

Built 2000 Load: 32.6 t ADT: 390

OLD VILLA RICA ROA

Good

Over: WILD HORSE CREEK

1 MI N OF POWDER SPRINGS, Cobb, GA

Built 2000 Load: 32.6 t ADT: 5,750

I-285 RAMP CCBL

Good

Over: ROTTENWOOD CR-CUMB. BVLD

6.7 MILES SE OF MARIETTA, Cobb, GA

Built 2003 Load: 32.6 t ADT: 6,750

BARRETT PARKWAY

Good

Over: NOSES CREEK

2 MILES SOUTH WEST OF MAR, Cobb, GA

Built 2001 Load: 32.6 t ADT: 15,700

DUNCAN ROAD

Good

Over: NOONDAY CREEK

2 MI E OF KENNESAW, Cobb, GA

Built 2004 Load: 32.6 t ADT: 2,004

CUMBERLAND BOULEVA

Good

Over: ROTTENWOOD CREEK

6.7 MILES SOUTH EAST OF, Cobb, GA

Built 2004 Load: 32.6 t ADT: 15,105

SOUTHSIDE DRIVE

Good

Over: COWAN ROAD CR-3501

IN ACWORTH CITY LIMITS, Cobb, GA

Built 2002 Load: 32.6 t ADT: 4,280

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.