US Bridges

FAS 170 over Childress Branch

Fair

Knox County, Tennessee · .2 M NW of Depot RD · Structure no. 47S24740003

Built
1945
80 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
3,767
2021 count
Owner
State
State Highway Agency

About this bridge

FAS 170 over Childress Branch is a concrete continuous culvert carrying FAS 170 over Childress Branch in Knox County, Tennessee. It was built in 1945, so it is 80 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 3,767 vehicles a day, roughly 4% of them trucks, projected to reach 6,382 by 2042. The structure is 24 ft (7.4 m) long and 22 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFAS 170
CrossesChildress Branch
Location.2 M NW of Depot RD
RouteState Highway 170
CountyKnox County
StateTennessee
Coordinates36.08165, -84.0544
Functional classRural Major 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.4 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length24 ft (7.4 m)
Longest span11 ft (3.4 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,767 (2021)
Projected traffic6,382 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$184,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAS 170 over Childress Branch built?

It was built in 1945, making it 80 years old in 2025.

What condition is FAS 170 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 February 2024.

How much traffic does FAS 170 over Childress Branch carry?

About 3,767 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAS 170 over Childress Branch?

The structure is 24 ft (7.4 m) long with a longest span of 11 ft (3.4 m) and a deck 22 ft wide.

Who owns FAS 170 over Childress Branch?

It is owned by the State Highway Agency.