Structure 83SR3860023 · Sumner County, TN

Fau 4870 over SR 386

Carries Fau 4870 over SR 386, 3.6 Mi NE Jct SR 6 &sr258.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT233 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 7/9

233 ft end to end, longest span 120 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
Length232.9 ft71 m
Daily traffic6,515counted 2021
Last inspectedSeptember 2024every 24 months

Location

StateTennessee
CountySumner
Location3.6 Mi NE Jct SR 6 &sr258
CarriesFau 4870
CrossesSR 386
Coordinates36.33143, -86.57882

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Single/Spread
Total Length232.9 ft (71 m)
Max Span120.1 ft (36.6 m)
Deck Width29.9 ft (9.1 m)
Deck Area646.1 sq m
Main Spans2
Year Built1981

Traffic

Avg Daily Traffic6,515 (2021)
Truck Traffic3%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number83SR3860023

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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