Structure 860A4810001 · Unicoi County, TN

Nfa A481 over Dry Creek

Carries Nfa A481 over Dry Creek, .1 Mi NW Of Dry Creek RD.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT28 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 28 ft across. 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.

Built20215 years old
Length27.9 ft8.5 m
Daily traffic10counted 2020
Last inspectedJuly 2024every 24 months

Location

StateTennessee
CountyUnicoi
Location.1 Mi NW Of Dry Creek RD
CarriesNfa A481
CrossesDry Creek
Coordinates36.18017, -82.37535

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length27.9 ft (8.5 m)
Max Span24.9 ft (7.6 m)
Deck Width27.6 ft (8.4 m)
Deck Area71.4 sq m
Main Spans1
Year Built2021

Traffic

Avg Daily Traffic10 (2020)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number860A4810001

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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