Structure 47I00750023 · Knox County, TN

Nfa A842 over Gap Rd. / I75

Carries Nfa A842 over Gap Rd. / I75, Just W Of Sharps Gap.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT220 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

220 ft end to end, longest span 110 ft: about 3 semi-trucks nose to tail. 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 box-beam bridge.

Built198145 years old
Length220.1 ft67.1 m
Daily traffic4,810counted 2020
Last inspectedJanuary 2025every 24 months

Location

StateTennessee
CountyKnox
LocationJust W Of Sharps Gap
CarriesNfa A842
CrossesGap Rd. / I75
Coordinates35.99423, -83.96648

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length220.1 ft (67.1 m)
Max Span109.9 ft (33.5 m)
Deck Width45.9 ft (14 m)
Deck Area939.4 sq m
Main Spans2
Year Built1981

Traffic

Avg Daily Traffic4,810 (2020)
Truck Traffic2%
Lanes On Bridge3
Lanes Under Bridge8

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number47I00750023

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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