Structure 13500280 · Gwinnett County, GA

SR 120 over Csx Railroad

Carries SR 120 over Csx Railroad, In Lawrenceville City Lmt.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT134 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

134 ft end to end, longest span 46 ft. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1937rebuilt 1981
Length133.9 ft40.8 m
Daily traffic44,500counted 2024
Last inspectedOctober 2023every 24 months

Location

StateGeorgia
CountyGwinnett
LocationIn Lawrenceville City Lmt
CarriesSR 120
CrossesCsx Railroad
Coordinates33.95963, -84.00375

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length133.9 ft (40.8 m)
Max Span45.9 ft (14 m)
Deck Width78.1 ft (23.8 m)
Deck Area971.0 sq m
Main Spans3
Year Built1937 (reconstructed 1981)

Traffic

Avg Daily Traffic44,500 (2024)
Truck Traffic1%
Lanes On Bridge5

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000013500280

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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