US Bridges

Nfa 1347 (sa 8602) over Higgins Creek

Good

Unicoi County, Tennessee · 1.8 M S of SR36 · Structure no. 86F00080009

Built
1980
45 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
234
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1347 (sa 8602) over Higgins Creek is a concrete continuous culvert carrying Nfa 1347 (sa 8602) over Higgins Creek in Unicoi County, Tennessee. It was built in 1980, so it is 45 years old, younger 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 234 vehicles a day, roughly 3% of them trucks, projected to reach 374 by 2042. The structure is 31 ft (9.4 m) long and 73 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa 1347 (sa 8602)
CrossesHiggins Creek
Location1.8 M S of SR36
RouteCounty Highway 1347
CountyUnicoi County
StateTennessee
Coordinates36.0377, -82.51045
Functional classRural Minor Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span14 ft (4.3 m)
Deck width73 ft (22.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic234 (2021)
Projected traffic374 by 2042
Trucks3%
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

OwnerCounty Highway Agency
Maintained byCounty 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 1347 (sa 8602) over Higgins Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Nfa 1347 (sa 8602) over Higgins 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 July 2024.

How much traffic does Nfa 1347 (sa 8602) over Higgins Creek carry?

About 234 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1347 (sa 8602) over Higgins Creek?

The structure is 31 ft (9.4 m) long with a longest span of 14 ft (4.3 m) and a deck 73 ft wide.

Who owns Nfa 1347 (sa 8602) over Higgins Creek?

It is owned by the County Highway Agency.