US Bridges

Post Oak Tritt Roa over Willeo Creek Trib.

Good

Cobb County, Georgia · 9.2 Miles NE of Marietta · Structure no. 000000006752730

Built
2008
17 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
7,850
2024 count
Owner
County
County Highway Agency

About this bridge

Post Oak Tritt Roa over Willeo Creek Trib. is a concrete culvert carrying Post Oak Tritt Roa over Willeo Creek Trib. in Cobb County, Georgia. It was built in 2008, so it is 17 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 7,850 vehicles a day, roughly 2% of them trucks, projected to reach 13,185 by 2032. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesPost Oak Tritt Roa
CrossesWilleo Creek Trib.
Location9.2 Miles NE of Marietta
RouteCounty Highway 580
StateGeorgia
Coordinates34.01887, -84.41049
Functional classUrban Collector

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length30 ft (9.1 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,850 (2024)
Projected traffic13,185 by 2032
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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$176,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Post Oak Tritt Roa over Willeo Creek Trib. built?

It was built in 2008, making it 17 years old in 2025.

What condition is Post Oak Tritt Roa over Willeo Creek Trib. 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 August 2023.

How much traffic does Post Oak Tritt Roa over Willeo Creek Trib. carry?

About 7,850 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Post Oak Tritt Roa over Willeo Creek Trib.?

The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.3 m).

Who owns Post Oak Tritt Roa over Willeo Creek Trib.?

It is owned by the County Highway Agency.