Structure 58I00240069 · Marion County, TN

I24 Wbl over I-24 WB / Shellmound Rd.

Carries I24 Wbl over I-24 WB / Shellmound Rd., 3 Mi S Of Sr28.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT106 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 7/9

106 ft end to end, longest span 42 ft. Lengths and the car 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 tee-beam bridge.

Built196561 years old
Length106.0 ft32.3 m
Daily traffic52,102counted 2021
Last inspectedJuly 2024every 24 months

Location

StateTennessee
CountyMarion
Location3 Mi S Of Sr28
CarriesI24 Wbl
CrossesI-24 WB / Shellmound Rd.
Coordinates35.04398, -85.60290

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length106.0 ft (32.3 m)
Max Span42.0 ft (12.8 m)
Deck Width40.4 ft (12.3 m)
Deck Area397.3 sq m
Main Spans3
Year Built1965

Traffic

Avg Daily Traffic52,102 (2021)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number58I00240069

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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