Structure 13500270 · Gwinnett County, GA

SR 120 over SR 316

Carries SR 120 over SR 316, 0.5 Mi W Of Lawrenceville.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT276 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

276 ft end to end, longest span 77 ft: about 4 semi-trucks nose to tail. 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 tee-beam bridge.

Built1960rebuilt 1979
Length275.9 ft84.1 m
Daily traffic22,020counted 2024
Last inspectedJanuary 2024every 24 months

Location

StateGeorgia
CountyGwinnett
Location0.5 Mi W Of Lawrenceville
CarriesSR 120
CrossesSR 316
Coordinates33.96720, -84.01650

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length275.9 ft (84.1 m)
Max Span77.1 ft (23.5 m)
Deck Width80.1 ft (24.4 m)
Deck Area2052.0 sq m
Main Spans4
Year Built1960 (reconstructed 1979)

Traffic

Avg Daily Traffic22,020 (2024)
Truck Traffic1%
Lanes On Bridge5
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000013500270

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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