US Bridges

SR 120 over CSX Railroad

Fair

Gwinnett County, Georgia · In Lawrenceville City Lmt · Structure no. 000000013500280

Built
1937
88 years old, rebuilt 1981
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
134 ft
3 main spans
Daily traffic
44,500
2024 count
Owner
State
State Highway Agency

About this bridge

SR 120 over CSX Railroad is a steel stringer/multi-beam or girder carrying SR 120 over CSX Railroad in Gwinnett County, Georgia. It was built in 1937 and reconstructed in 1981, so it is 88 years old, older than the Georgia average of 47.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 44,500 vehicles a day, roughly 1% of them trucks, projected to reach 66,645 by 2032. The structure is 134 ft (40.8 m) long and 78 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 120
CrossesCSX Railroad
LocationIn Lawrenceville City Lmt
RouteState Highway 120
CountyGwinnett County
StateGeorgia
Coordinates33.95963, -84.00375
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.9 US tons
Inventory rating21.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length134 ft (40.8 m)
Longest span46 ft (14 m)
Deck width78 ft (23.8 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,500 (2024)
Projected traffic66,645 by 2032
Trucks1%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 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$1.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 120 over CSX Railroad built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1981.

What condition is SR 120 over CSX Railroad in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.

How much traffic does SR 120 over CSX Railroad carry?

About 44,500 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is SR 120 over CSX Railroad?

The structure is 134 ft (40.8 m) long with a longest span of 46 ft (14 m) and a deck 78 ft wide.

Who owns SR 120 over CSX Railroad?

It is owned by the State Highway Agency.