US Bridges

County Line Road over Little Allatoon Creek

Good

Cobb County, Georgia · 5 MI SW of Acworth · Structure no. 000000006752940

Built
2011
14 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
2,047
2024 count
Owner
County
County Highway Agency

About this bridge

County Line Road over Little Allatoon Creek is a concrete culvert carrying County Line Road over Little Allatoon Creek in Cobb County, Georgia. It was built in 2011, so it is 14 years old, younger than the Georgia average of 47.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,047 vehicles a day, roughly 1% of them trucks, projected to reach 2,895 by 2032. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty Line Road
CrossesLittle Allatoon Creek
Location5 MI SW of Acworth
RouteCounty Highway 129
CountyCobb County
StateGeorgia
Coordinates34.00248, -84.72453
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,047 (2024)
Projected traffic2,895 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$123,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County Line Road over Little Allatoon Creek built?

It was built in 2011, making it 14 years old in 2025.

What condition is County Line Road over Little Allatoon Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does County Line Road over Little Allatoon Creek carry?

About 2,047 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is County Line Road over Little Allatoon Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns County Line Road over Little Allatoon Creek?

It is owned by the County Highway Agency.