Structure 66015380005 · Obion County, TN

Nfa 1538 (sa 6620) over Harris Fork Creek

Carries Nfa 1538 (sa 6620) over Harris Fork Creek, 2.5 Mi SW Jct Sr43&sr215.

Overall conditionGood

Set by its lowest-rated component: Superstructure and Substructure at 7 of 9.

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT109 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 7/9 · sets the ratingSubstructure 7/9 · sets the rating

109 ft end to end. 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 or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.

Built200719 years old
Length108.9 ft33.2 m
Daily traffic321counted 2021
Last inspectedMarch 2023every 24 months

Location

StateTennessee
CountyObion
Location2.5 Mi SW Jct Sr43&sr215
CarriesNfa 1538 (sa 6620)
CrossesHarris Fork Creek
Coordinates36.46717, -88.91164

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Single/Spread
Total Length108.9 ft (33.2 m)
Max Span108.9 ft (33.2 m)
Deck Width27.9 ft (8.5 m)
Deck Area282.2 sq m
Main Spans1
Year Built2007

Traffic

Avg Daily Traffic321 (2021)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number66015380005

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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