Structure 11700110 · Forsyth County, GA

Shiloh Road over SR 400 (us 19)

Carries Shiloh Road over SR 400 (us 19), 6 Mi SW Of Cumming.

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 FT392 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

392 ft end to end, longest span 126 ft: about 5 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 multi-beam bridge.

Built197353 years old
Length392.1 ft119.5 m
Daily traffic1,594counted 2024
Last inspectedMay 2023every 24 months

Location

StateGeorgia
CountyForsyth
Location6 Mi SW Of Cumming
CarriesShiloh Road
CrossesSR 400 (us 19)
Coordinates34.12961, -84.21058

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length392.1 ft (119.5 m)
Max Span126.0 ft (38.4 m)
Deck Width32.2 ft (9.8 m)
Deck Area1171.1 sq m
Main Spans4
Year Built1973

Traffic

Avg Daily Traffic1,594 (2024)
Truck Traffic1%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000011700110

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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