Structure 40S80920015 · Henry County, TN

Fas 140 over Middle Fork Obion River

Carries Fas 140 over Middle Fork Obion River, 1.3 Mile South Of Como.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT111 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

111 ft end to end, longest span 37 ft. 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 box-beam bridge.

Built198739 years old
Length110.9 ft33.8 m
Daily traffic619counted 2021
Last inspectedSeptember 2023every 24 months

Location

StateTennessee
CountyHenry
Location1.3 Mile South Of Como
CarriesFas 140
CrossesMiddle Fork Obion River
Coordinates36.27114, -88.50953

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length110.9 ft (33.8 m)
Max Span37.1 ft (11.3 m)
Deck Width26.2 ft (8 m)
Deck Area270.4 sq m
Main Spans3
Year Built1987

Traffic

Avg Daily Traffic619 (2021)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number40S80920015

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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