US Bridges

Nfa A145 over Hellhole Creek

Fair

Bledsoe County, Tennessee · 1 M Off SR 28 at Ninemile · Structure no. 040A1450001

Built
1991
34 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
30
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A145 over Hellhole Creek is a concrete continuous culvert carrying Nfa A145 over Hellhole Creek in Bledsoe County, Tennessee. It was built in 1991, so it is 34 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 30 vehicles a day, roughly 8% of them trucks, projected to reach 48 by 2038. The structure is 27 ft (8.1 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNfa A145
CrossesHellhole Creek
Location1 M Off SR 28 at Ninemile
RouteCounty Highway 145
CountyBledsoe County
StateTennessee
Coordinates35.71124, -85.10303
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating71.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length27 ft (8.1 m)
Longest span12 ft (3.7 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2020)
Projected traffic48 by 2038
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 A145 over Hellhole Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Nfa A145 over Hellhole 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 July 2024.

How much traffic does Nfa A145 over Hellhole Creek carry?

About 30 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Nfa A145 over Hellhole Creek?

The structure is 27 ft (8.1 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns Nfa A145 over Hellhole Creek?

It is owned by the County Highway Agency.