Structure 850A1350003 · Trousdale County, TN

Nfa A135 over Darwin Creek

Carries Nfa A135 over Darwin Creek, City Of Hartsville.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT32 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 32 ft across with 2 openings. 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, so those are drawn as typical for a culvert.

Built198442 years old
Length32.2 ft9.8 m
Daily traffic3,130counted 2020
Last inspectedFebruary 2023every 24 months

Location

StateTennessee
CountyTrousdale
LocationCity Of Hartsville
CarriesNfa A135
CrossesDarwin Creek
Coordinates36.39034, -86.15636

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length32.2 ft (9.8 m)
Max Span12.1 ft (3.7 m)
Deck Width31.5 ft (9.6 m)
Deck Area94.1 sq m
Main Spans2
Year Built1984

Traffic

Avg Daily Traffic3,130 (2020)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number850A1350003

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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