Structure 830A4380003 · Sumner County, TN

Nfa A438 over Branch

Carries Nfa A438 over Branch, 2.0 Mi SW Jct SR 109&sr6.

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
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT45 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

45 ft end to end. 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 multi-beam bridge.

Built200422 years old
Length44.6 ft13.6 m
Daily traffic310counted 2020
Last inspectedJanuary 2025every 24 months

Location

StateTennessee
CountySumner
Location2.0 Mi SW Jct SR 109&sr6
CarriesNfa A438
CrossesBranch
Coordinates36.34553, -86.49159

Physical Characteristics

MaterialConcrete
DesignStringer/Multi-beam
Total Length44.6 ft (13.6 m)
Max Span42.0 ft (12.8 m)
Deck Width49.9 ft (15.2 m)
Deck Area206.7 sq m
Main Spans1
Year Built2004

Traffic

Avg Daily Traffic310 (2020)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number830A4380003

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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