US Bridges

Nfa A360 over Harpeth River

Fair

Cheatham County, Tennessee · 0.75 M.N. I40 in Pegram · Structure no. 110A3600001

Built
1987
38 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
351 ft
4 main spans
Daily traffic
1,240
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A360 over Harpeth River is a prestressed concrete continuous box beam or girders - single or spread carrying Nfa A360 over Harpeth River in Cheatham County, Tennessee. It was built in 1987, so it is 38 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 1,240 vehicles a day, roughly 4% of them trucks, projected to reach 1,984 by 2041. The structure is 351 ft (107 m) long and 24 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesNfa A360
CrossesHarpeth River
Location0.75 M.N. I40 in Pegram
RouteCity Street 360
CountyCheatham County
StateTennessee
Coordinates36.09604, -87.05447
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length351 ft (107 m)
Longest span88 ft (26.8 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,240 (2020)
Projected traffic1,984 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$1.5 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A360 over Harpeth River built?

It was built in 1987, making it 38 years old in 2025.

What condition is Nfa A360 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 July 2024.

How much traffic does Nfa A360 over Harpeth River carry?

About 1,240 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Nfa A360 over Harpeth River?

The structure is 351 ft (107 m) long with a longest span of 88 ft (26.8 m) and a deck 24 ft wide.

Who owns Nfa A360 over Harpeth River?

It is owned by the City or Municipal Highway Agency.