US Bridges

Nfa A128 over Furnace Creek

FairPosted for load

Johnson County, Tennessee · W Off SR91 in Mtn. City · Structure no. 460A1280001

Built
1959
66 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
170
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A128 over Furnace Creek is a steel stringer/multi-beam or girder carrying Nfa A128 over Furnace Creek in Johnson County, Tennessee. It was built in 1959, so it is 66 years old, older 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. Its operating status is: posted for load restriction.

It carries about 170 vehicles a day, roughly 5% of them trucks, projected to reach 272 by 2042. The structure is 31 ft (9.4 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNfa A128
CrossesFurnace Creek
LocationW Off SR91 in Mtn. City
RouteCity Street 128
CountyJohnson County
StateTennessee
Coordinates36.48714, -81.79669
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating4.6 US tons
Inventory rating3.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length31 ft (9.4 m)
Longest span28 ft (8.6 m)
Deck width22 ft (6.7 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2020)
Projected traffic272 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$496,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A128 over Furnace Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is Nfa A128 over Furnace Creek 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 April 2024.

How much traffic does Nfa A128 over Furnace Creek carry?

About 170 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Nfa A128 over Furnace Creek?

The structure is 31 ft (9.4 m) long with a longest span of 28 ft (8.6 m) and a deck 22 ft wide.

Who owns Nfa A128 over Furnace Creek?

It is owned by the City or Municipal Highway Agency.