US Bridges

Nfa A379 over Buffalo Creek

FairPosted for load

Grainger County, Tennessee · 6 M SW of SR92-US11W · Structure no. 290A3780001

Built
1935
90 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
190
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A379 over Buffalo Creek is a steel stringer/multi-beam or girder carrying Nfa A379 over Buffalo Creek in Grainger County, Tennessee. It was built in 1935, so it is 90 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 190 vehicles a day, roughly 4% of them trucks, projected to reach 304 by 2042. The structure is 31 ft (9.6 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa A379
CrossesBuffalo Creek
Location6 M SW of SR92-US11W
RouteCounty Highway 379
CountyGrainger County
StateTennessee
Coordinates36.20543, -83.55563
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating3.2 US tons
Inventory rating2.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length31 ft (9.6 m)
Longest span21 ft (6.3 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2020)
Projected traffic304 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$493,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A379 over Buffalo Creek built?

It was built in 1935, making it 90 years old in 2025.

What condition is Nfa A379 over Buffalo 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 2023.

How much traffic does Nfa A379 over Buffalo Creek carry?

About 190 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Nfa A379 over Buffalo Creek?

The structure is 31 ft (9.6 m) long with a longest span of 21 ft (6.3 m) and a deck 20 ft wide.

Who owns Nfa A379 over Buffalo Creek?

It is owned by the County Highway Agency.