US Bridges

I640 over Branch

Fair

Knox County, Tennessee · Near Millertown Pike · Structure no. 47I06400029

Built
1981
44 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
69,368
2021 count
Owner
State
State Highway Agency

About this bridge

I640 over Branch is a concrete continuous culvert carrying I640 over Branch 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 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 69,368 vehicles a day, roughly 6% of them trucks, projected to reach 119,040 by 2040. The structure is 25 ft (7.5 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesI640
CrossesBranch
LocationNear Millertown Pike
RouteInterstate 640
CountyKnox County
StateTennessee
Coordinates36.0287, -83.86665
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating24.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.5 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69,368 (2021)
Projected traffic119,040 by 2040
Trucks6%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$505,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I640 over Branch built?

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

What condition is I640 over Branch 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 I640 over Branch carry?

About 69,368 vehicles per day (2021 count), of which roughly 6% are trucks.

How long is I640 over Branch?

The structure is 25 ft (7.5 m) long with a longest span of 11 ft (3.5 m).

Who owns I640 over Branch?

It is owned by the State Highway Agency.