US Bridges

Nfa A156 over N Fork Bull Run Creek

Good

Union County, Tennessee · E of SR144- S of Maynardv · Structure no. 870A1560005

Built
1975
50 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete
Length
42 ft
2 main spans
Daily traffic
210
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A156 over N Fork Bull Run Creek is a concrete culvert carrying Nfa A156 over N Fork Bull Run Creek in Union County, Tennessee. It was built in 1975, so it is 50 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 210 vehicles a day, roughly 2% of them trucks, projected to reach 336 by 2042. The structure is 42 ft (12.8 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesNfa A156
CrossesN Fork Bull Run Creek
LocationE of SR144- S of Maynardv
RouteCounty Highway 156
Coordinates36.21874, -83.82983
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.
Culvert8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating30 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span20 ft (6.2 m)
Deck width28 ft (8.5 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2020)
Projected traffic336 by 2042
Trucks2%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$200,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A156 over N Fork Bull Run Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Nfa A156 over N Fork Bull Run 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 A156 over N Fork Bull Run Creek carry?

About 210 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A156 over N Fork Bull Run Creek?

The structure is 42 ft (12.8 m) long with a longest span of 20 ft (6.2 m) and a deck 28 ft wide.

Who owns Nfa A156 over N Fork Bull Run Creek?

It is owned by the County Highway Agency.