Structure 270A3090001 · Gibson County, TN

Nfa A309 over Bear Creek

Carries Nfa A309 over Bear Creek, 2.6 Mi NE Jct Sr43&sr54.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating4/9 · Poor
Substructure6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT47 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 4/9 · sets the ratingSubstructure 6/9

47 ft end to end, longest span 29 ft. 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 channel-beam bridge.

Built200620 years old
Length47.2 ft14.4 m
Daily traffic40counted 2020
Last inspectedSeptember 2023every 24 months

Location

StateTennessee
CountyGibson
Location2.6 Mi NE Jct Sr43&sr54
CarriesNfa A309
CrossesBear Creek
Coordinates36.08997, -88.76735

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length47.2 ft (14.4 m)
Max Span28.5 ft (8.7 m)
Deck Width21.7 ft (6.6 m)
Deck Area95.0 sq m
Main Spans2
Year Built2006

Traffic

Avg Daily Traffic40 (2020)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number270A3090001

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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