Structure 4700290 · Catoosa County, GA

I-75 over South Chickamauga Creek

Carries I-75 over South Chickamauga Creek, 1.9 Mi SW Of Ringgold.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT300 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

300 ft end to end, longest span 60 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.

Built1960rebuilt 1988
Length299.9 ft91.4 m
Daily traffic92,700counted 2024
Last inspectedNovember 2023every 24 months

Location

StateGeorgia
CountyCatoosa
Location1.9 Mi SW Of Ringgold
CarriesI-75
CrossesSouth Chickamauga Creek
Coordinates34.89700, -85.08241

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length299.9 ft (91.4 m)
Max Span60.0 ft (18.3 m)
Deck Width139.1 ft (42.4 m)
Deck Area3875.4 sq m
Main Spans5
Year Built1960 (reconstructed 1988)

Traffic

Avg Daily Traffic92,700 (2024)
Truck Traffic1%
Lanes On Bridge6

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number000000004700290

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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