Structure 66015300001 · Obion County, TN

Nfa 1530 (sa 6613) over Kilham Creek

Carries Nfa 1530 (sa 6613) over Kilham Creek, 4.5 Mi SE Jct Sr22&sr157.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT55 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 7/9

55 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 box-beam bridge.

Built1970rebuilt 2009
Length55.1 ft16.8 m
Daily traffic630counted 2021
Last inspectedMarch 2023every 24 months

Location

StateTennessee
CountyObion
Location4.5 Mi SE Jct Sr22&sr157
CarriesNfa 1530 (sa 6613)
CrossesKilham Creek
Coordinates36.40369, -89.23547

Physical Characteristics

MaterialConcrete
DesignBox Beam - Multiple
Total Length55.1 ft (16.8 m)
Max Span36.1 ft (11 m)
Deck Width25.3 ft (7.7 m)
Deck Area129.4 sq m
Main Spans1
Year Built1970 (reconstructed 2009)

Traffic

Avg Daily Traffic630 (2021)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number66015300001

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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