US Bridges

FAP 106 over Harpeth River

Good

Williamson County, Tennessee · 1.8 M NW JCT SR106&SR96 · Structure no. 94SR1060015

Built
1998
27 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
312 ft
4 main spans
Daily traffic
18,198
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 106 over Harpeth River is a prestressed concrete continuous stringer/multi-beam or girder carrying FAP 106 over Harpeth River in Williamson County, Tennessee. It was built in 1998, so it is 27 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 18,198 vehicles a day, roughly 9% of them trucks, projected to reach 23,384 by 2041. The structure is 312 ft (95.1 m) long and 86 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesFAP 106
CrossesHarpeth River
Location1.8 M NW JCT SR106&SR96
RouteU.S. Route 431
Coordinates35.94725, -86.88139
Functional classUrban Other Principal Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length312 ft (95.1 m)
Longest span78 ft (23.7 m)
Deck width86 ft (26.2 m)
Roadway width84 ft (25.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,198 (2021)
Projected traffic23,384 by 2041
Trucks9%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was FAP 106 over Harpeth River built?

It was built in 1998, making it 27 years old in 2025.

What condition is FAP 106 over 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 January 2025.

How much traffic does FAP 106 over Harpeth River carry?

About 18,198 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is FAP 106 over Harpeth River?

The structure is 312 ft (95.1 m) long with a longest span of 78 ft (23.7 m) and a deck 86 ft wide.

Who owns FAP 106 over Harpeth River?

It is owned by the State Highway Agency.