US Bridges

Nfa A030 over South Indian Creek

Good

Unicoi County, Tennessee · Just Off SR 81 near 36 · Structure no. 860A0300001

Built
1982
43 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete Continuous
Length
65 ft
4 main spans
Daily traffic
70
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A030 over South Indian Creek is a concrete continuous culvert carrying Nfa A030 over South Indian Creek in Unicoi County, Tennessee. It was built in 1982, so it is 43 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 70 vehicles a day, roughly 6% of them trucks, projected to reach 112 by 2040. The structure is 65 ft (19.7 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesNfa A030
CrossesSouth Indian Creek
LocationJust Off SR 81 near 36
RouteCounty Highway 30
Coordinates36.05947, -82.52182
Functional classRural 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 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 geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length65 ft (19.7 m)
Longest span14 ft (4.4 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2020)
Projected traffic112 by 2040
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 A030 over South Indian Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is Nfa A030 over South Indian 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 A030 over South Indian Creek carry?

About 70 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is Nfa A030 over South Indian Creek?

The structure is 65 ft (19.7 m) long with a longest span of 14 ft (4.4 m) and a deck 35 ft wide.

Who owns Nfa A030 over South Indian Creek?

It is owned by the County Highway Agency.