US Bridges

Nfa A423 over TVA Loop Ramp / SR-1

Fair

Humphreys County, Tennessee · At SR1 New Johnsonville · Structure no. 43SR0010031

Built
2001
24 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
281 ft
2 main spans
Daily traffic
500
2020 count
Owner
State
State Highway Agency

About this bridge

Nfa A423 over TVA Loop Ramp / SR-1 is a prestressed concrete continuous stringer/multi-beam or girder carrying Nfa A423 over TVA Loop Ramp / SR-1 in Humphreys County, Tennessee. It was built in 2001, so it is 24 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 500 vehicles a day, roughly 16% of them trucks, projected to reach 800 by 2042. The structure is 281 ft (85.5 m) long and 64 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A423
CrossesTVA Loop Ramp / SR-1
LocationAt SR1 New Johnsonville
RouteCity Street 423
CountyHumphreys County
StateTennessee
Coordinates36.01853, -87.98309
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length281 ft (85.5 m)
Longest span149 ft (45.4 m)
Deck width64 ft (19.5 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2020)
Projected traffic800 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa A423 over TVA Loop Ramp / SR-1 built?

It was built in 2001, making it 24 years old in 2025.

What condition is Nfa A423 over TVA Loop Ramp / SR-1 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 2023.

How much traffic does Nfa A423 over TVA Loop Ramp / SR-1 carry?

About 500 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is Nfa A423 over TVA Loop Ramp / SR-1?

The structure is 281 ft (85.5 m) long with a longest span of 149 ft (45.4 m) and a deck 64 ft wide.

Who owns Nfa A423 over TVA Loop Ramp / SR-1?

It is owned by the State Highway Agency.