US Bridges

Rock Chapel Road over Mountain Creek

Good

DeKalb County, Georgia · 3.5 MI NE of Lithonia · Structure no. 000000008951440

Built
2000
25 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
189 ft
3 main spans
Daily traffic
36,900
2024 count
Owner
State
State Highway Agency

About this bridge

Rock Chapel Road over Mountain Creek is a prestressed concrete stringer/multi-beam or girder carrying Rock Chapel Road over Mountain Creek in DeKalb County, Georgia. It was built in 2000, so it is 25 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 36,900 vehicles a day, roughly 1% of them trucks, projected to reach 35,955 by 2031. The structure is 189 ft (57.6 m) long and 85 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRock Chapel Road
CrossesMountain Creek
Location3.5 MI NE of Lithonia
RouteState Highway 124
CountyDeKalb County
StateGeorgia
Coordinates33.77323, -84.07697
Functional classUrban Other Principal Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length189 ft (57.6 m)
Longest span89 ft (27.1 m)
Deck width85 ft (26 m)
Roadway width71 ft (21.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,900 (2024)
Projected traffic35,955 by 2031
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Rock Chapel Road over Mountain Creek built?

It was built in 2000, making it 25 years old in 2025.

What condition is Rock Chapel Road over Mountain 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 2024.

How much traffic does Rock Chapel Road over Mountain Creek carry?

About 36,900 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Rock Chapel Road over Mountain Creek?

The structure is 189 ft (57.6 m) long with a longest span of 89 ft (27.1 m) and a deck 85 ft wide.

Who owns Rock Chapel Road over Mountain Creek?

It is owned by the State Highway Agency.