Structure 22S61490003 · Dickson County, TN

Fas 250 over Harpeth River

Carries Fas 250 over Harpeth River, Dickson-cheatham Co. Line.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT608 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

608 ft end to end, longest span 60 ft: about 1.7 football fields. 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 tee-beam bridge.

Built196066 years old
Length607.9 ft185.3 m
Daily traffic1,102counted 2021
Last inspectedApril 2024every 24 months

Location

StateTennessee
CountyDickson
LocationDickson-cheatham Co. Line
CarriesFas 250
CrossesHarpeth River
Coordinates36.19142, -87.16727

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length607.9 ft (185.3 m)
Max Span60.0 ft (18.3 m)
Deck Width28.5 ft (8.7 m)
Deck Area1612.1 sq m
Main Spans9
Year Built1960

Traffic

Avg Daily Traffic1,102 (2021)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical3 — Scour critical
Structure Number22S61490003

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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