US Bridges

Nfa 1003 (sa 9411) over Harpeth River

Good

Williamson County, Tennessee · 4.4 MI W JCT SR96&SR252 · Structure no. 94S61830015

Built
1975
50 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
200 ft
3 main spans
Daily traffic
5,492
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1003 (sa 9411) over Harpeth River is a prestressed concrete continuous stringer/multi-beam or girder carrying Nfa 1003 (sa 9411) over Harpeth River in Williamson County, Tennessee. It was built in 1975, so it is 50 years old, older 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 5,492 vehicles a day, roughly 3% of them trucks, projected to reach 5,874 by 2042. The structure is 200 ft (61 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNfa 1003 (sa 9411)
CrossesHarpeth River
Location4.4 MI W JCT SR96&SR252
RouteCounty Highway 1003
Coordinates35.87842, -86.79063
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating34 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length200 ft (61 m)
Longest span73 ft (22.3 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,492 (2021)
Projected traffic5,874 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1003 (sa 9411) over Harpeth River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Nfa 1003 (sa 9411) 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 1003 (sa 9411) over Harpeth River carry?

About 5,492 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1003 (sa 9411) over Harpeth River?

The structure is 200 ft (61 m) long with a longest span of 73 ft (22.3 m) and a deck 40 ft wide.

Who owns Nfa 1003 (sa 9411) over Harpeth River?

It is owned by the County Highway Agency.