US Bridges

Nfa A393 over Long Creek

Fair

Macon County, Tennessee · 5 M SW Red Boiling Spring · Structure no. 560A3930001

Built
1984
41 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
56 ft
3 main spans
Daily traffic
40
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A393 over Long Creek is a concrete continuous culvert carrying Nfa A393 over Long Creek in Macon County, Tennessee. It was built in 1984, so it is 41 years old, younger 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 40 vehicles a day, roughly 1% of them trucks, projected to reach 64 by 2041. The structure is 56 ft (17.1 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNfa A393
CrossesLong Creek
Location5 M SW Red Boiling Spring
RouteCounty Highway 393
CountyMacon County
StateTennessee
Coordinates36.51297, -85.93462
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span15 ft (4.6 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2020)
Projected traffic64 by 2041
Trucks1%
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 A393 over Long Creek built?

It was built in 1984, making it 41 years old in 2025.

What condition is Nfa A393 over Long Creek 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 August 2023.

How much traffic does Nfa A393 over Long Creek carry?

About 40 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Nfa A393 over Long Creek?

The structure is 56 ft (17.1 m) long with a longest span of 15 ft (4.6 m) and a deck 26 ft wide.

Who owns Nfa A393 over Long Creek?

It is owned by the County Highway Agency.