Structure 49F00110007 · Lauderdale County, TN

Nfa 821 (sa 4930) over S Fk. Forked Deer River

Carries Nfa 821 (sa 4930) over S Fk. Forked Deer River, Near Halls.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT209 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

209 ft end to end, longest span 50 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 multi-beam bridge.

Built199135 years old
Length209.0 ft63.7 m
Daily traffic225counted 2021
Last inspectedDecember 2023every 24 months

Location

StateTennessee
CountyLauderdale
LocationNear Halls
CarriesNfa 821 (sa 4930)
CrossesS Fk. Forked Deer River
Coordinates35.88072, -89.35367

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length209.0 ft (63.7 m)
Max Span49.9 ft (15.2 m)
Deck Width31.5 ft (9.6 m)
Deck Area611.5 sq m
Main Spans3
Year Built1991

Traffic

Avg Daily Traffic225 (2021)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number49F00110007

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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