Structure 46S24610009 · Johnson County, TN

Nfa 1394 (sa 4603) over Avery Branch

Carries Nfa 1394 (sa 4603) over Avery Branch, Dry Run Rd-s Of Sr167.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
23 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 23 ft across with 2 openings. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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.

Built195571 years old
Length23.0 ft7 m
Daily traffic369counted 2021
Last inspectedApril 2024every 24 months

Location

StateTennessee
CountyJohnson
LocationDry Run Rd-s Of Sr167
CarriesNfa 1394 (sa 4603)
CrossesAvery Branch
Coordinates36.37007, -81.87334

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length23.0 ft (7 m)
Max Span11.2 ft (3.4 m)
Deck Area51.1 sq m
Main Spans2
Year Built1955

Traffic

Avg Daily Traffic369 (2021)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number46S24610009

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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