Structure 47I00400193 · Knox County, TN

I40 Rp 6-b2 over I40-rp-6-b2 /i40-rp-6-c1

Carries I40 Rp 6-b2 over I40-rp-6-b2 /i40-rp-6-c1, At I-40 & Sr332.

Overall conditionGood

Set by its lowest-rated component: Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT120 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

120 ft end to end. Lengths and the car 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.

Built200521 years old
Length119.8 ft36.5 m
Daily traffic—reported figure implausible
Last inspectedOctober 2024every 24 months

Location

StateTennessee
CountyKnox
LocationAt I-40 & Sr332
CarriesI40 Rp 6-b2
CrossesI40-rp-6-b2 /i40-rp-6-c1
Coordinates35.94063, -84.00356

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length119.8 ft (36.5 m)
Max Span116.8 ft (35.6 m)
Deck Width32.2 ft (9.8 m)
Deck Area357.7 sq m
Main Spans1
Year Built2005

Traffic

Avg Daily Traffic179,856 (2021)
That is about 179,856 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 Traffic6%
Lanes On Bridge1
Lanes Under Bridge1

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number47I00400193

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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