US Bridges

Nfa 980 over Harpeth River

Good

Williamson County, Tennessee · 1.2 MI SE JCT SR11&SR16 · Structure no. 94F00290007

Built
2023
2 years old
Condition
Good
inspected April 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
85 ft
1 main span
Daily traffic
484
2022 count
Owner
County
County Highway Agency

About this bridge

Nfa 980 over Harpeth River is a prestressed concrete box beam or girders - single or spread carrying Nfa 980 over Harpeth River in Williamson County, Tennessee. It was built in 2023, so it is 2 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 484 vehicles a day, roughly 3% of them trucks, projected to reach 741 by 2042. The structure is 85 ft (25.9 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 980
CrossesHarpeth River
Location1.2 MI SE JCT SR11&SR16
RouteCounty Highway 980
CountyWilliamson County
StateTennessee
Coordinates35.7863, -86.66109
Functional classRural Minor Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length85 ft (25.9 m)
Longest span85 ft (25.9 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic484 (2022)
Projected traffic741 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$271,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 980 over Harpeth River built?

It was built in 2023, making it 2 years old in 2025.

What condition is Nfa 980 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 April 2023.

How much traffic does Nfa 980 over Harpeth River carry?

About 484 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Nfa 980 over Harpeth River?

The structure is 85 ft (25.9 m) long with a longest span of 85 ft (25.9 m) and a deck 30 ft wide.

Who owns Nfa 980 over Harpeth River?

It is owned by the County Highway Agency.