Structure 500A6450001 · Lawrence County, TN

Nfa A645 over Crowson Creek

Carries Nfa A645 over Crowson Creek, 0.5m.n.sr15in Lawrenceber.

Overall conditionFair

Set by its lowest-rated component: Culvert at 5 of 9.

How ratings work
Culvertsets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT51 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 5/9

A culvert 51 ft across with 3 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.

Built1930rebuilt 1940
Length50.9 ft15.5 m
Daily traffic90counted 2020
Last inspectedJune 2023every 24 months

Location

StateTennessee
CountyLawrence
Location0.5m.n.sr15in Lawrenceber
CarriesNfa A645
CrossesCrowson Creek
Coordinates35.24370, -87.35619

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length50.9 ft (15.5 m)
Max Span15.1 ft (4.6 m)
Deck Width20.3 ft (6.2 m)
Deck Area96.1 sq m
Main Spans3
Year Built1930 (reconstructed 1940)

Traffic

Avg Daily Traffic90 (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 CriticalUnknown
Structure Number500A6450001

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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