Structure 500A6470001 · Lawrence County, TN

Nfa A647 over Coon Creek

Carries Nfa A647 over Coon Creek, 1 M.w.sr6 @ Lawrenceberg..

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT37 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 6/9

37 ft end to end, longest span 17 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 slab bridge.

Built195076 years old
Length37.1 ft11.3 m
Daily traffic930counted 2020
Last inspectedJune 2023every 24 months

Location

StateTennessee
CountyLawrence
Location1 M.w.sr6 @ Lawrenceberg.
CarriesNfa A647
CrossesCoon Creek
Coordinates35.21848, -87.34170

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length37.1 ft (11.3 m)
Max Span17.1 ft (5.2 m)
Deck Width24.3 ft (7.4 m)
Deck Area83.6 sq m
Main Spans2
Year Built1950

Traffic

Avg Daily Traffic930 (2020)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number500A6470001

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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