US Bridges

Nfa A010 over Slippery Branch

Fair

Lewis County, Tennessee · 5.5 M. Nw. Hohenwald. · Structure no. 510A0100001

Built
1962
63 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete Continuous
Length
46 ft
2 main spans
Daily traffic
40
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A010 over Slippery Branch is a concrete continuous culvert carrying Nfa A010 over Slippery Branch in Lewis County, Tennessee. It was built in 1962, so it is 63 years old, older 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 5 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 10% of them trucks, projected to reach 64 by 2041. The structure is 46 ft (14 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 A010
CrossesSlippery Branch
Location5.5 M. Nw. Hohenwald.
RouteCounty Highway 10
CountyLewis County
StateTennessee
Coordinates35.62758, -87.57606
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length46 ft (14 m)
Longest span15 ft (4.6 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2020)
Projected traffic64 by 2041
Trucks10%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$286,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A010 over Slippery Branch built?

It was built in 1962, making it 63 years old in 2025.

What condition is Nfa A010 over Slippery Branch 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 June 2023.

How much traffic does Nfa A010 over Slippery Branch carry?

About 40 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is Nfa A010 over Slippery Branch?

The structure is 46 ft (14 m) long with a longest span of 15 ft (4.6 m) and a deck 26 ft wide.

Who owns Nfa A010 over Slippery Branch?

It is owned by the County Highway Agency.