Structure 41F04950003 · Hickman County, TN

Nfa 963 (sa 4119) over Duck River

Carries Nfa 963 (sa 4119) over Duck River, 2.2 M North Of Shady Grov.

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 overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT426 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

426 ft end to end, longest span 118 ft: about 6 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 multi-beam bridge.

Built198739 years old
Length425.9 ft129.8 m
Daily traffic370counted 2021
Last inspectedSeptember 2023every 24 months

Location

StateTennessee
CountyHickman
Location2.2 M North Of Shady Grov
CarriesNfa 963 (sa 4119)
CrossesDuck River
Coordinates35.75385, -87.28257

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length425.9 ft (129.8 m)
Max Span118.1 ft (36 m)
Deck Width30.2 ft (9.2 m)
Deck Area1194.2 sq m
Main Spans4
Year Built1987

Traffic

Avg Daily Traffic370 (2021)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number41F04950003

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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