US Bridges

Mt Gravel Springs over I-85

Good

Gwinnett County, Georgia · 4.5 Miles SE of Buford · Structure no. 000000013552440

Built
2012
13 years old
Condition
Good
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
466 ft
3 main spans
Daily traffic
33,100
2024 count
Owner
State
State Highway Agency

About this bridge

Mt Gravel Springs over I-85 is a steel continuous stringer/multi-beam or girder carrying Mt Gravel Springs over I-85 in Gwinnett County, Georgia. It was built in 2012, so it is 13 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 33,100 vehicles a day, roughly 8% of them trucks, projected to reach 116,925 by 2030. The structure is 466 ft (142 m) long and 102 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesMt Gravel Springs
CrossesI-85
Location4.5 Miles SE of Buford
RouteState Highway 324
StateGeorgia
Coordinates34.06333, -83.94703
Functional classUrban Minor 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating42 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length466 ft (142 m)
Longest span173 ft (52.7 m)
Deck width102 ft (31.2 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,100 (2024)
Projected traffic116,925 by 2030
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

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$1.6 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mt Gravel Springs over I-85 built?

It was built in 2012, making it 13 years old in 2025.

What condition is Mt Gravel Springs over I-85 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 November 2023.

How much traffic does Mt Gravel Springs over I-85 carry?

About 33,100 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Mt Gravel Springs over I-85?

The structure is 466 ft (142 m) long with a longest span of 173 ft (52.7 m) and a deck 102 ft wide.

Who owns Mt Gravel Springs over I-85?

It is owned by the State Highway Agency.