Structure 450A8970001 · Jefferson County, TN

Nfa A897 over Lost Creek

Carries Nfa A897 over Lost Creek, 2.7 M SW Of Us11e-sr92 Jc.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure5/9 · Fair
Substructuresets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT25 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9Substructure 4/9 · sets the rating

25 ft end to end. 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.

Built196066 years old
Length25.3 ft7.7 m
Daily traffic70counted 2020
Last inspectedApril 2023every 24 months

Location

StateTennessee
CountyJefferson
Location2.7 M SW Of Us11e-sr92 Jc
CarriesNfa A897
CrossesLost Creek
Coordinates36.08038, -83.50743

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length25.3 ft (7.7 m)
Max Span18.0 ft (5.5 m)
Deck Width16.1 ft (4.9 m)
Deck Area37.7 sq m
Main Spans1
Year Built1960

Traffic

Avg Daily Traffic70 (2020)
Truck Traffic2%
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number450A8970001

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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