Structure 79I00400021 · Shelby County, TN

I40-eb-rp To I240 over I40-rp-k / I240-rl-ex-rp

Carries I40-eb-rp To I240 over I40-rp-k / I240-rl-ex-rp, I40 - I240 Jct.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT254 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 6/9Substructure 7/9

254 ft end to end, longest span 89 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.

Built196660 years old
Length253.9 ft77.4 m
Daily traffic—reported figure implausible
Last inspectedOctober 2024every 24 months

Location

StateTennessee
CountyShelby
LocationI40 - I240 Jct
CarriesI40-eb-rp To I240
CrossesI40-rp-k / I240-rl-ex-rp
Coordinates35.14667, -90.02281

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length253.9 ft (77.4 m)
Max Span88.6 ft (27 m)
Deck Width36.7 ft (11.2 m)
Deck Area866.9 sq m
Main Spans3
Year Built1966

Traffic

Avg Daily Traffic62,695 (2021)
That is about 62,695 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 Bridge1

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number79I00400021

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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