Structure 19I00400013 · Davidson County, TN

I40 over Sawyer Brown RD

Carries I40 over Sawyer Brown RD, I40/ Sawyer Brown RD.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT162 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

162 ft end to end, longest span 61 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 multi-beam bridge.

Built1959rebuilt 1991
Length162.1 ft49.4 m
Daily traffic65,660counted 2021
Last inspectedOctober 2023every 24 months

Location

StateTennessee
CountyDavidson
LocationI40/ Sawyer Brown RD
CarriesI40
CrossesSawyer Brown RD
Coordinates36.10441, -86.93157

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length162.1 ft (49.4 m)
Max Span61.0 ft (18.6 m)
Deck Width60.0 ft (18.3 m)
Deck Area904.0 sq m
Main Spans3
Year Built1959 (reconstructed 1991)

Traffic

Avg Daily Traffic65,660 (2021)
Truck Traffic7%
Lanes On Bridge3
Lanes Under Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number19I00400013

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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