Structure 45SR0090011 · Jefferson County, TN

Fas 9 over Koontz Creek

Carries Fas 9 over Koontz Creek, .4 M E Of Oak Grove.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT132 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 4/9 · sets the ratingSubstructure 5/9

132 ft end to end, longest span 32 ft. Lengths and the semi-truck 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 tee-beam bridge.

Built1930rebuilt 1957
Length131.9 ft40.2 m
Daily traffic7,782counted 2021
Last inspectedOctober 2023every 24 months

Location

StateTennessee
CountyJefferson
Location.4 M E Of Oak Grove
CarriesFas 9
CrossesKoontz Creek
Coordinates36.03458, -83.38180

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length131.9 ft (40.2 m)
Max Span32.2 ft (9.8 m)
Deck Width35.4 ft (10.8 m)
Deck Area434.2 sq m
Main Spans4
Year Built1930 (reconstructed 1957)

Traffic

Avg Daily Traffic7,782 (2021)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number45SR0090011

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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