Structure 33I00240029 · Hamilton County, TN

I24 over I24 / Southern Railway

Carries I24 over I24 / Southern Railway, 1 M E Of I124 Jct.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT300 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 6/9

300 ft end to end, longest span 122 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.

Built1958rebuilt 1990
Length299.9 ft91.4 m
Daily traffic105,057counted 2021
Last inspectedSeptember 2024every 24 months

Location

StateTennessee
CountyHamilton
Location1 M E Of I124 Jct
CarriesI24
CrossesI24 / Southern Railway
Coordinates35.02568, -85.30318

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length299.9 ft (91.4 m)
Max Span122.0 ft (37.2 m)
Deck Width144.0 ft (43.9 m)
Deck Area4012.5 sq m
Main Spans3
Year Built1958 (reconstructed 1990)

Traffic

Avg Daily Traffic105,057 (2021)
Truck Traffic7%
Lanes On Bridge8

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number33I00240029

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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