US Bridges

Nfa A020 731147T over Southern Railway

Fair

Sullivan County, Tennessee · 3.1 M N of Carter CO LN · Structure no. 82SR0370009

Built
1989
36 years old
Condition
Fair
inspected February 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
162 ft
3 main spans
Daily traffic
1,036
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa A020 731147T over Southern Railway is a prestressed concrete continuous box beam or girders - single or spread carrying Nfa A020 731147T over Southern Railway in Sullivan County, Tennessee. It was built in 1989, so it is 36 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 1,036 vehicles a day, roughly 13% of them trucks, projected to reach 2,752 by 2042. The structure is 162 ft (49.5 m) long and 30 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

Location

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CarriesNfa A020 731147T
CrossesSouthern Railway
Location3.1 M N of Carter CO LN
RouteCounty Highway 20
CountySullivan County
StateTennessee
Coordinates36.45583, -82.27567
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length162 ft (49.5 m)
Longest span59 ft (18.1 m)
Deck width30 ft (9.2 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,036 (2021)
Projected traffic2,752 by 2042
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed62.1 mi (100 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa A020 731147T over Southern Railway built?

It was built in 1989, making it 36 years old in 2025.

What condition is Nfa A020 731147T over Southern Railway 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 February 2024.

How much traffic does Nfa A020 731147T over Southern Railway carry?

About 1,036 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is Nfa A020 731147T over Southern Railway?

The structure is 162 ft (49.5 m) long with a longest span of 59 ft (18.1 m) and a deck 30 ft wide.

Who owns Nfa A020 731147T over Southern Railway?

It is owned by the County Highway Agency.