Structure 4700410 · Catoosa County, GA

I-75 over SR 146

Carries I-75 over SR 146, 4 Mi E Of Ft Oglethorpe.

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 FT225 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

225 ft end to end, longest span 138 ft: about 3 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.

Built1961rebuilt 2010
Length225.1 ft68.6 m
Daily traffic103,000counted 2024
Last inspectedDecember 2023every 24 months

Location

StateGeorgia
CountyCatoosa
Location4 Mi E Of Ft Oglethorpe
CarriesI-75
CrossesSR 146
Coordinates34.96782, -85.19119

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length225.1 ft (68.6 m)
Max Span138.1 ft (42.1 m)
Deck Width153.9 ft (46.9 m)
Deck Area3217.3 sq m
Main Spans3
Year Built1961 (reconstructed 2010)

Traffic

Avg Daily Traffic103,000 (2024)
Truck Traffic1%
Lanes On Bridge6
Lanes Under Bridge7

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000004700410

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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