US Bridges

FAS 106 over West Harpeth River

Good

Williamson County, Tennessee · .8 M SE JCT I65&SR106 · Structure no. 94SR1060005

Built
2013
12 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
63 ft
1 main span
Daily traffic
6,851
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 106 over West Harpeth River is a prestressed concrete stringer/multi-beam or girder carrying FAS 106 over West Harpeth River in Williamson County, Tennessee. It was built in 2013, so it is 12 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,851 vehicles a day, roughly 7% of them trucks, projected to reach 14,432 by 2041. The structure is 63 ft (19.3 m) long and 34 ft wide. If it were closed, the detour would be 32.9 mi (53 km).

CarriesFAS 106
CrossesWest Harpeth River
Location.8 M SE JCT I65&SR106
RouteU.S. Route 431
Coordinates35.79578, -86.84328
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length63 ft (19.3 m)
Longest span60 ft (18.3 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,851 (2021)
Projected traffic14,432 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed32.9 mi (53 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 106 over West Harpeth River built?

It was built in 2013, making it 12 years old in 2025.

What condition is FAS 106 over West Harpeth River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does FAS 106 over West Harpeth River carry?

About 6,851 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is FAS 106 over West Harpeth River?

The structure is 63 ft (19.3 m) long with a longest span of 60 ft (18.3 m) and a deck 34 ft wide.

Who owns FAS 106 over West Harpeth River?

It is owned by the State Highway Agency.