US Bridges

Nfa A166 over Flenniken Br

Good

Knox County, Tennessee · W Off SR33 N of SR168 JCT · Structure no. 470A1160003

Built
1940
85 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete Continuous
Length
28 ft
2 main spans
Daily traffic
1,015
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa A166 over Flenniken Br is a concrete continuous culvert carrying Nfa A166 over Flenniken Br in Knox County, Tennessee. It was built in 1940, so it is 85 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,015 vehicles a day, roughly 4% of them trucks, projected to reach 1,744 by 2041. The structure is 28 ft (8.5 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNfa A166
CrossesFlenniken Br
LocationW Off SR33 N of SR168 JCT
RouteCounty Highway 5871
CountyKnox County
StateTennessee
Coordinates35.9083, -83.9404
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length28 ft (8.5 m)
Longest span10 ft (3 m)
Deck width31 ft (9.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,015 (2021)
Projected traffic1,744 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$239,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A166 over Flenniken Br built?

It was built in 1940, making it 85 years old in 2025.

What condition is Nfa A166 over Flenniken Br in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does Nfa A166 over Flenniken Br carry?

About 1,015 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Nfa A166 over Flenniken Br?

The structure is 28 ft (8.5 m) long with a longest span of 10 ft (3 m) and a deck 31 ft wide.

Who owns Nfa A166 over Flenniken Br?

It is owned by the County Highway Agency.