Structure 8902910 · DeKalb County, GA

I-675 Nbl over I-285 (sr 407)

Carries I-675 Nbl over I-285 (sr 407), 9.5 Mi S Of Decatur.

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 FT280 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

280 ft end to end, longest span 155 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 multi-beam bridge.

Built198442 years old
Length279.9 ft85.3 m
Daily traffic16,500counted 2024
Last inspectedMarch 2024every 24 months

Location

StateGeorgia
CountyDeKalb
Location9.5 Mi S Of Decatur
CarriesI-675 Nbl
CrossesI-285 (sr 407)
Coordinates33.67377, -84.32606

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length279.9 ft (85.3 m)
Max Span154.9 ft (47.2 m)
Deck Width45.3 ft (13.8 m)
Deck Area1177.1 sq m
Main Spans2
Year Built1984

Traffic

Avg Daily Traffic16,500 (2024)
Truck Traffic13%
Lanes On Bridge2
Lanes Under Bridge8

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000008902910

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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