Structure 470A7310001 · Knox County, TN

Nfa A731 over Trib. To Third Creek

Carries Nfa A731 over Trib. To Third Creek, 1.6 M W Of Sr62 I640 Jct.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT46 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 46 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built20179 years old
Length45.9 ft14 m
Daily traffic1,180counted 2020
Last inspectedApril 2024every 24 months

Location

StateTennessee
CountyKnox
Location1.6 M W Of Sr62 I640 Jct
CarriesNfa A731
CrossesTrib. To Third Creek
Coordinates35.97510, -84.00748

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length45.9 ft (14 m)
Max Span16.1 ft (4.9 m)
Deck Width135.5 ft (41.3 m)
Deck Area578.2 sq m
Main Spans2
Year Built2017

Traffic

Avg Daily Traffic1,180 (2020)
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number470A7310001

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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