Structure 140A2150001 · Clay County, TN

Nfa A215 over Mill Creek

Carries Nfa A215 over Mill Creek, 2.5 Mi From SR 53.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT54 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

54 ft end to end, longest span 23 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 multi-beam bridge.

Built194086 years old
Length53.8 ft16.4 m
Daily traffic10counted 2020
Last inspectedApril 2024every 24 months

Location

StateTennessee
CountyClay
Location2.5 Mi From SR 53
CarriesNfa A215
CrossesMill Creek
Coordinates36.49518, -85.50951

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length53.8 ft (16.4 m)
Max Span22.6 ft (6.9 m)
Deck Width12.1 ft (3.7 m)
Deck Area60.7 sq m
Main Spans3
Year Built1940

Traffic

Avg Daily Traffic10 (2020)
Truck Traffic2%
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number140A2150001

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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