Structure 79I02400027 · Shelby County, TN

I240 over I240 Rp / Sr4 Rp & 5218

Carries I240 over I240 Rp / Sr4 Rp & 5218, 0.1 Mi. N Of Sr-4 Jct..

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT641 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

641 ft end to end, longest span 108 ft: about 1.8 football fields. 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.

Built196759 years old
Length641.1 ft195.4 m
Daily traffic—reported figure implausible
Last inspectedFebruary 2023every 24 months

Location

StateTennessee
CountyShelby
Location0.1 Mi. N Of Sr-4 Jct.
CarriesI240
CrossesI240 Rp / Sr4 Rp & 5218
Coordinates35.13308, -90.02364

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length641.1 ft (195.4 m)
Max Span107.6 ft (32.8 m)
Deck Width27.6 ft (8.4 m)
Deck Area1641.4 sq m
Main Spans7
Year Built1967

Traffic

Avg Daily Traffic82,917 (2021)
That is about 82,917 vehicles per lane per day — beyond what any U.S. road carries (the busiest freeways run about 25,000–30,000). It is almost certainly a data-entry error in the National Bridge Inventory, so we leave this bridge out of traffic rankings.
Truck Traffic8%
Lanes On Bridge1
Lanes Under Bridge3

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number79I02400027

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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