US Bridges

Nfa A339 730185Y over Southern Railway

PoorPosted for load

Hawkins County, Tennessee · Near Phipps Bend · Structure no. 370A3390001

Built
1977
48 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
96 ft
3 main spans
Daily traffic
10
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A339 730185Y over Southern Railway is a steel stringer/multi-beam or girder carrying Nfa A339 730185Y over Southern Railway in Hawkins County, Tennessee. It was built in 1977, so it is 48 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, roughly 2% of them trucks, projected to reach 16 by 2042. The structure is 96 ft (29.3 m) long and 13 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesNfa A339 730185Y
CrossesSouthern Railway
LocationNear Phipps Bend
RouteCounty Highway 339
CountyHawkins County
StateTennessee
Coordinates36.48108, -82.82712
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating7.8 US tons
Inventory rating6.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans3
Design loadH 20
Structure length96 ft (29.3 m)
Longest span56 ft (17.1 m)
Deck width13 ft (4.1 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2020)
Projected traffic16 by 2042
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesRailroad
Detour if closed123.7 mi (199 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$439,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa A339 730185Y over Southern Railway built?

It was built in 1977, making it 48 years old in 2025.

What condition is Nfa A339 730185Y over Southern Railway in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2023.

How much traffic does Nfa A339 730185Y over Southern Railway carry?

About 10 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A339 730185Y over Southern Railway?

The structure is 96 ft (29.3 m) long with a longest span of 56 ft (17.1 m) and a deck 13 ft wide.

Who owns Nfa A339 730185Y over Southern Railway?

It is owned by the County Highway Agency.