US Bridges

Nfa A347 over Witcher Hollow Creek

Good

Macon County, Tennessee · 1 M E Red Boiling Springs · Structure no. 560A3470001

Built
1960
65 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete Continuous
Length
38 ft
2 main spans
Daily traffic
300
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa A347 over Witcher Hollow Creek is a concrete continuous culvert carrying Nfa A347 over Witcher Hollow Creek in Macon County, Tennessee. It was built in 1960, so it is 65 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 300 vehicles a day, roughly 4% of them trucks, projected to reach 480 by 2041. The structure is 38 ft (11.6 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa A347
CrossesWitcher Hollow Creek
Location1 M E Red Boiling Springs
RouteCity Street 347
CountyMacon County
StateTennessee
Coordinates36.53176, -85.8351
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 10
Structure length38 ft (11.6 m)
Longest span12 ft (3.7 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2020)
Projected traffic480 by 2041
Trucks4%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$271,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A347 over Witcher Hollow Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Nfa A347 over Witcher Hollow 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 August 2023.

How much traffic does Nfa A347 over Witcher Hollow Creek carry?

About 300 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Nfa A347 over Witcher Hollow Creek?

The structure is 38 ft (11.6 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns Nfa A347 over Witcher Hollow Creek?

It is owned by the City or Municipal Highway Agency.