Structure 470B3590001 · Knox County, TN

Nfa B359 over Holbrook DR / B363

Carries Nfa B359 over Holbrook DR / B363, Holbrook-near Cedar& Sr33.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT63 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

63 ft end to end, longest span 24 ft. 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 tee-beam bridge.

Built1935rebuilt 1965
Length63.0 ft19.2 m
Daily traffic2,070counted 2020
Last inspectedMarch 2024every 24 months

Location

StateTennessee
CountyKnox
LocationHolbrook-near Cedar& Sr33
CarriesNfa B359
CrossesHolbrook DR / B363
Coordinates36.03698, -83.93546

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length63.0 ft (19.2 m)
Max Span24.0 ft (7.3 m)
Deck Width37.4 ft (11.4 m)
Deck Area218.9 sq m
Main Spans3
Year Built1935 (reconstructed 1965)

Traffic

Avg Daily Traffic2,070 (2020)
Truck Traffic2%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number470B3590001

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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