US Bridges

FAP 6 over Little Harpeth River

Fair

Williamson County, Tennessee · Near Franklin Tennessee · Structure no. 94SR0060017

Built
1982
43 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
163 ft
3 main spans
Daily traffic
20,705
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 6 over Little Harpeth River is a prestressed concrete continuous box beam or girders - single or spread carrying FAP 6 over Little Harpeth River in Williamson County, Tennessee. It was built in 1982, so it is 43 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 20,705 vehicles a day, roughly 9% of them trucks, projected to reach 28,154 by 2041. The structure is 163 ft (49.7 m) long and 78 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesFAP 6
CrossesLittle Harpeth River
LocationNear Franklin Tennessee
RouteU.S. Route 31
Coordinates36.015, -86.79905
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating26.8 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length163 ft (49.7 m)
Longest span55 ft (16.8 m)
Deck width78 ft (23.8 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,705 (2021)
Projected traffic28,154 by 2041
Trucks9%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 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 FAP 6 over Little Harpeth River built?

It was built in 1982, making it 43 years old in 2025.

What condition is FAP 6 over Little Harpeth River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2025.

How much traffic does FAP 6 over Little Harpeth River carry?

About 20,705 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is FAP 6 over Little Harpeth River?

The structure is 163 ft (49.7 m) long with a longest span of 55 ft (16.8 m) and a deck 78 ft wide.

Who owns FAP 6 over Little Harpeth River?

It is owned by the State Highway Agency.