Structure 45S24650001 · Jefferson County, TN

Nfa 1296 (sa 4509) over Piedmont Branch

Carries Nfa 1296 (sa 4509) over Piedmont Branch, 3 M NW Of Us70-i40 Jct.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT28 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

28 ft end to end, longest span 13 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 slab bridge.

Built195571 years old
Length28.2 ft8.6 m
Daily traffic862counted 2021
Last inspectedMay 2023every 24 months

Location

StateTennessee
CountyJefferson
Location3 M NW Of Us70-i40 Jct
CarriesNfa 1296 (sa 4509)
CrossesPiedmont Branch
Coordinates36.02605, -83.52924

Physical Characteristics

MaterialConcrete
DesignSlab
Total Length28.2 ft (8.6 m)
Max Span13.5 ft (4.1 m)
Deck Width24.6 ft (7.5 m)
Deck Area64.5 sq m
Main Spans2
Year Built1955

Traffic

Avg Daily Traffic862 (2021)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number45S24650001

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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