Structure 45I00400007 · Jefferson County, TN

I40 over Nfa A486 Chestnut Grv RD

Carries I40 over Nfa A486 Chestnut Grv RD, 9.36mi.from Sevier Co. LN.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT131 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

131 ft end to end, longest span 52 ft. 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 tee-beam bridge.

Built1965rebuilt 2000
Length131.2 ft40 m
Daily traffic75,118counted 2021
Last inspectedJune 2024every 24 months

Location

StateTennessee
CountyJefferson
Location9.36mi.from Sevier Co. LN
CarriesI40
CrossesNfa A486 Chestnut Grv RD
Coordinates36.04849, -83.41846

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length131.2 ft (40 m)
Max Span51.5 ft (15.7 m)
Deck Width126.3 ft (38.5 m)
Deck Area1,540 sq m
Main Spans3
Year Built1965 (reconstructed 2000)

Traffic

Avg Daily Traffic75,118 (2021)
Truck Traffic6%
Lanes On Bridge3
Lanes Under Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number45I00400007

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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