Structure 13500900 · Gwinnett County, GA

Killian Hill Road over Csx Railroad

Carries Killian Hill Road over Csx Railroad, In Lilburn.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT129 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

129 ft end to end, longest span 43 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.

Built197551 years old
Length128.9 ft39.3 m
Daily traffic26,900counted 2024
Last inspectedNovember 2023every 24 months

Location

StateGeorgia
CountyGwinnett
LocationIn Lilburn
CarriesKillian Hill Road
CrossesCsx Railroad
Coordinates33.89106, -84.12730

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length128.9 ft (39.3 m)
Max Span43.0 ft (13.1 m)
Deck Width46.6 ft (14.2 m)
Deck Area558.1 sq m
Main Spans3
Year Built1975

Traffic

Avg Daily Traffic26,900 (2024)
Truck Traffic1%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000013500900

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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