US Bridges

Mt Zion Road over Mark Branch

Good

Rockdale County, Georgia · 3.5 MI N of Conyers · Structure no. 000000024750180

Built
1992
33 years old
Condition
Good
inspected May 2023
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
29 ft
1 main span
Daily traffic
3,020
2024 count
Owner
County
County Highway Agency

About this bridge

Mt Zion Road over Mark Branch is a aluminum, wrought iron, or cast iron culvert carrying Mt Zion Road over Mark Branch in Rockdale County, Georgia. It was built in 1992, so it is 33 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,020 vehicles a day, roughly 1% of them trucks, projected to reach 1,860 by 2032. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesMt Zion Road
CrossesMark Branch
Location3.5 MI N of Conyers
RouteCounty Highway 86
StateGeorgia
Coordinates33.72131, -84.01433
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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadH 15
Structure length29 ft (8.8 m)
Longest span29 ft (8.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,020 (2024)
Projected traffic1,860 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$170,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mt Zion Road over Mark Branch built?

It was built in 1992, making it 33 years old in 2025.

What condition is Mt Zion Road over Mark Branch 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 May 2023.

How much traffic does Mt Zion Road over Mark Branch carry?

About 3,020 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Mt Zion Road over Mark Branch?

The structure is 29 ft (8.8 m) long with a longest span of 29 ft (8.8 m).

Who owns Mt Zion Road over Mark Branch?

It is owned by the County Highway Agency.