US Bridges

Nfa E386 over Childress Branch

Fair

Knox County, Tennessee · S of Heiskell · Structure no. 470D3860001

Built
1964
61 years old
Condition
Fair
inspected June 2024
Type
Channel Beam
Concrete
Length
37 ft
1 main span
Daily traffic
260
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa E386 over Childress Branch is a concrete channel beam carrying Nfa E386 over Childress Branch in Knox County, Tennessee. It was built in 1964, so it is 61 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 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 260 vehicles a day, roughly 2% of them trucks, projected to reach 416 by 2040. The structure is 37 ft (11.3 m) long and 21 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesNfa E386
CrossesChildress Branch
LocationS of Heiskell
RouteCounty Highway 386
CountyKnox County
StateTennessee
Coordinates36.0733, -84.04865
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length37 ft (11.3 m)
Longest span35 ft (10.7 m)
Deck width21 ft (6.5 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic260 (2020)
Projected traffic416 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$148,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa E386 over Childress Branch built?

It was built in 1964, making it 61 years old in 2025.

What condition is Nfa E386 over Childress 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 June 2024.

How much traffic does Nfa E386 over Childress Branch carry?

About 260 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa E386 over Childress Branch?

The structure is 37 ft (11.3 m) long with a longest span of 35 ft (10.7 m) and a deck 21 ft wide.

Who owns Nfa E386 over Childress Branch?

It is owned by the County Highway Agency.