Structure 79I00550055 · Shelby County, TN

I55 Rp To Sr14 over I-55 Rp / Sr-14 & I-55

Carries I55 Rp To Sr14 over I-55 Rp / Sr-14 & I-55, I55 & SR 14 Jct.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT512 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

512 ft end to end: about 7 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.

Built196363 years old
Length512.1 ft156.1 m
Daily traffic—reported figure implausible
Last inspectedDecember 2024every 24 months

Location

StateTennessee
CountyShelby
LocationI55 & SR 14 Jct
CarriesI55 Rp To Sr14
CrossesI-55 Rp / Sr-14 & I-55
Coordinates35.07908, -90.05620

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length512.1 ft (156.1 m)
Max Span133.5 ft (40.7 m)
Deck Width26.6 ft (8.1 m)
Deck Area1264.4 sq m
Main Spans1
Year Built1963

Traffic

Avg Daily Traffic97,284 (2021)
That is about 97,284 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 Bridge10

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number79I00550055

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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