Structure 19I00400117 · Davidson County, TN

I40 over Mill Creek

Carries I40 over Mill Creek, 1.0 M SW Jct Sr155&i40.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT254 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 4/9 · sets the rating

254 ft end to end, longest span 54 ft: about 4 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.

Built1963rebuilt 2008
Length254.3 ft77.5 m
Daily traffic131,122counted 2021
Last inspectedDecember 2023every 24 months

Location

StateTennessee
CountyDavidson
Location1.0 M SW Jct Sr155&i40
CarriesI40
CrossesMill Creek
Coordinates36.14133, -86.71460

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length254.3 ft (77.5 m)
Max Span53.8 ft (16.4 m)
Deck Width168.0 ft (51.2 m)
Deck Area3,968 sq m
Main Spans5
Year Built1963 (reconstructed 2008)

Traffic

Avg Daily Traffic131,122 (2021)
Truck Traffic7%
Lanes On Bridge10

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number19I00400117

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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