Structure 3I00400009 · Benton County, TN

I40 over Tennessee River

Carries I40 over Tennessee River, 8 Mi.from Decatur Co.ln..

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,670 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

2,670 ft end to end, longest span 450 ft: about 7.4 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 girder bridge.

Built199234 years old
Length2669.9 ft813.8 m
Daily traffic35,649counted 2021
Last inspectedJanuary 2024every 24 months

Location

StateTennessee
CountyBenton
Location8 Mi.from Decatur Co.ln.
CarriesI40
CrossesTennessee River
Coordinates35.86858, -87.94542

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length2669.9 ft (813.8 m)
Max Span450.1 ft (137.2 m)
Deck Width87.9 ft (26.8 m)
Deck Area21809.8 sq m
Main Spans3
Year Built1992

Traffic

Avg Daily Traffic35,649 (2021)
Truck Traffic7%
Lanes On Bridge4

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number03I00400009

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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