Structure 27SR0050027 · Gibson County, TN

Fas 185 299450a over W Tenn Railroad

Carries Fas 185 299450a over W Tenn Railroad, In Dyer City Limits.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT157 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

157 ft end to end, longest span 43 ft: about 2 semi-trucks nose to tail. 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.

Built195868 years old
Length157.2 ft47.9 m
Daily traffic2,953counted 2021
Last inspectedJune 2023every 24 months

Location

StateTennessee
CountyGibson
LocationIn Dyer City Limits
CarriesFas 185 299450a
CrossesW Tenn Railroad
Coordinates36.06183, -88.99036

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length157.2 ft (47.9 m)
Max Span42.7 ft (13 m)
Deck Width40.0 ft (12.2 m)
Deck Area584.4 sq m
Main Spans5
Year Built1958

Traffic

Avg Daily Traffic2,953 (2021)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number27SR0050027

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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