US Bridges

Nfa C908 over Harpeth River

Fair

Davidson County, Tennessee · In Nashville · Structure no. 190D9810005

Built
1986
39 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
252 ft
4 main spans
Daily traffic
2,740
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa C908 over Harpeth River is a prestressed concrete continuous box beam or girders - single or spread carrying Nfa C908 over Harpeth River in Davidson County, Tennessee. It was built in 1986, so it is 39 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 5 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 2,740 vehicles a day, roughly 2% of them trucks, projected to reach 4,384 by 2041. The structure is 252 ft (76.8 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa C908
CrossesHarpeth River
LocationIn Nashville
RouteCity Street 908
CountyDavidson County
StateTennessee
Coordinates36.08062, -86.99741
Functional classUrban Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating55 US tons
Inventory rating32.8 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length252 ft (76.8 m)
Longest span63 ft (19.2 m)
Deck width24 ft (7.4 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,740 (2020)
Projected traffic4,384 by 2041
Trucks2%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.4 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa C908 over Harpeth River built?

It was built in 1986, making it 39 years old in 2025.

What condition is Nfa C908 over 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 May 2023.

How much traffic does Nfa C908 over Harpeth River carry?

About 2,740 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa C908 over Harpeth River?

The structure is 252 ft (76.8 m) long with a longest span of 63 ft (19.2 m) and a deck 24 ft wide.

Who owns Nfa C908 over Harpeth River?

It is owned by the City or Municipal Highway Agency.