Structure 79I00550031 · Shelby County, TN

I55 NB over Nonconnah Creek

Carries I55 NB over Nonconnah Creek, .5 Mi S Of I240 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
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT637 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 6/9

637 ft end to end, longest span 141 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.

Built1962rebuilt 2001
Length637.5 ft194.3 m
Daily traffic131,916counted 2021
Last inspectedOctober 2024every 24 months

Location

StateTennessee
CountyShelby
Location.5 Mi S Of I240 Jct
CarriesI55 NB
CrossesNonconnah Creek
Coordinates35.06533, -90.02419

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length637.5 ft (194.3 m)
Max Span141.4 ft (43.1 m)
Deck Width86.0 ft (26.2 m)
Deck Area5090.7 sq m
Main Spans6
Year Built1962 (reconstructed 2001)

Traffic

Avg Daily Traffic131,916 (2021)
Truck Traffic8%
Lanes On Bridge4

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number79I00550031

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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