US Bridges

Nfa A115 over Buffat Mill Dr. / I640

FairPosted for load

Knox County, Tennessee · 1 M N of I640-I40 JCT · Structure no. 47I06400031

Built
1981
44 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
340 ft
3 main spans
Daily traffic
1,959
2021 count
Owner
State
State Highway Agency

About this bridge

Nfa A115 over Buffat Mill Dr. / I640 is a concrete continuous box beam or girders - multiple carrying Nfa A115 over Buffat Mill Dr. / I640 in Knox County, Tennessee. It was built in 1981, so it is 44 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. Its operating status is: posted for load restriction.

It carries about 1,959 vehicles a day, roughly 1% of them trucks, projected to reach 3,301 by 2042. The structure is 340 ft (103.6 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNfa A115
CrossesBuffat Mill Dr. / I640
Location1 M N of I640-I40 JCT
RouteCity Street 115
CountyKnox County
StateTennessee
Coordinates36.02801, -83.866
Functional classUrban Collector

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.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.9 US tons
Inventory rating22.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length340 ft (103.6 m)
Longest span137 ft (41.8 m)
Deck width50 ft (15.2 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,959 (2021)
Projected traffic3,301 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 A115 over Buffat Mill Dr. / I640 built?

It was built in 1981, making it 44 years old in 2025.

What condition is Nfa A115 over Buffat Mill Dr. / I640 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 A115 over Buffat Mill Dr. / I640 carry?

About 1,959 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Nfa A115 over Buffat Mill Dr. / I640?

The structure is 340 ft (103.6 m) long with a longest span of 137 ft (41.8 m) and a deck 50 ft wide.

Who owns Nfa A115 over Buffat Mill Dr. / I640?

It is owned by the State Highway Agency.