US Bridges

Nfa A402 (sa 7311) over Smith Creek

Good

Roane County, Tennessee · 1 M SE of US70 at Kingsto · Structure no. 730A2670001

Built
1940
85 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
970
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A402 (sa 7311) over Smith Creek is a concrete continuous culvert carrying Nfa A402 (sa 7311) over Smith Creek in Roane 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 970 vehicles a day, roughly 2% of them trucks, projected to reach 1,552 by 2041. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 6.8 mi (11 km).

CarriesNfa A402 (sa 7311)
CrossesSmith Creek
Location1 M SE of US70 at Kingsto
RouteCity Street 402
Coordinates35.84967, -84.49333
Functional classUrban Local

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic970 (2020)
Projected traffic1,552 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A402 (sa 7311) over Smith Creek built?

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

What condition is Nfa A402 (sa 7311) over Smith Creek 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 April 2023.

How much traffic does Nfa A402 (sa 7311) over Smith Creek carry?

About 970 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A402 (sa 7311) over Smith Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns Nfa A402 (sa 7311) over Smith Creek?

It is owned by the City or Municipal Highway Agency.