US Bridges

SR 120 over SR 316

Good

Gwinnett County, Georgia · 0.5 MI W of Lawrenceville · Structure no. 000000013500270

Built
1960
65 years old, rebuilt 1979
Condition
Good
inspected January 2024
Type
Tee Beam
Concrete Continuous
Length
276 ft
4 main spans
Daily traffic
22,020
2024 count
Owner
State
State Highway Agency

About this bridge

SR 120 over SR 316 is a concrete continuous tee beam carrying SR 120 over SR 316 in Gwinnett County, Georgia. It was built in 1960 and reconstructed in 1979, so it is 65 years old, older 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 22,020 vehicles a day, roughly 1% of them trucks, projected to reach 33,030 by 2032. The structure is 276 ft (84.1 m) long and 80 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 120
CrossesSR 316
Location0.5 MI W of Lawrenceville
RouteState Highway 120
StateGeorgia
Coordinates33.9672, -84.0165
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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating49.9 US tons
Inventory rating35.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length276 ft (84.1 m)
Longest span77 ft (23.5 m)
Deck width80 ft (24.4 m)
Roadway width66 ft (20.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,020 (2024)
Projected traffic33,030 by 2032
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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$2.9 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 120 over SR 316 built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1979.

What condition is SR 120 over SR 316 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 January 2024.

How much traffic does SR 120 over SR 316 carry?

About 22,020 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is SR 120 over SR 316?

The structure is 276 ft (84.1 m) long with a longest span of 77 ft (23.5 m) and a deck 80 ft wide.

Who owns SR 120 over SR 316?

It is owned by the State Highway Agency.