Structure 40S82370003 · Henry County, TN

Nfa 1715 (sa 4015) over Overflow

Carries Nfa 1715 (sa 4015) over Overflow, 1 Mi. N. Of Sr76.

Overall conditionFair

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

How ratings work
Culvertsets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
25 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 6/9

A culvert 25 ft across with 2 openings. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built196066 years old
Length24.9 ft7.6 m
Daily traffic1,692counted 2021
Last inspectedSeptember 2023every 24 months

Location

StateTennessee
CountyHenry
Location1 Mi. N. Of Sr76
CarriesNfa 1715 (sa 4015)
CrossesOverflow
Coordinates36.34550, -88.26305

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length24.9 ft (7.6 m)
Max Span7.9 ft (2.4 m)
Deck Area46.4 sq m
Main Spans2
Year Built1960

Traffic

Avg Daily Traffic1,692 (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 Number40S82370003

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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