Structure 900A8260003 · Washington County, TN

Nfa C440 over Boones Creek

Carries Nfa C440 over Boones Creek, SW Of I181-sr354 Jct.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT51 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 51 ft across with 3 openings. 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, so those are drawn as typical for a culvert.

Built200224 years old
Length50.9 ft15.5 m
Daily traffic220counted 2020
Last inspectedJune 2024every 24 months

Location

StateTennessee
CountyWashington
LocationSW Of I181-sr354 Jct
CarriesNfa C440
CrossesBoones Creek
Coordinates36.37968, -82.42394

Physical Characteristics

MaterialConcrete Continuous
DesignCulvert
Total Length50.9 ft (15.5 m)
Max Span15.7 ft (4.8 m)
Deck Width40.0 ft (12.2 m)
Deck Area189.1 sq m
Main Spans3
Year Built2002

Traffic

Avg Daily Traffic220 (2020)
Truck Traffic2%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number900A8260003

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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