US Bridges

Nfa A011 over Slippery Branch

Fair

Lewis County, Tennessee · 6 M. N. Hohenwald. · Structure no. 510A0110001

Built
1986
39 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete Continuous
Length
38 ft
2 main spans
Daily traffic
20
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A011 over Slippery Branch is a concrete continuous culvert carrying Nfa A011 over Slippery Branch in Lewis County, Tennessee. It was built in 1986, so it is 39 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 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 20 vehicles a day, roughly 4% of them trucks, projected to reach 32 by 2041. The structure is 38 ft (11.5 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A011
CrossesSlippery Branch
Location6 M. N. Hohenwald.
RouteCounty Highway 11
CountyLewis County
StateTennessee
Coordinates35.63414, -87.57584
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.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length38 ft (11.5 m)
Longest span12 ft (3.7 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2020)
Projected traffic32 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 A011 over Slippery Branch built?

It was built in 1986, making it 39 years old in 2025.

What condition is Nfa A011 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 A011 over Slippery Branch carry?

About 20 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Nfa A011 over Slippery Branch?

The structure is 38 ft (11.5 m) long with a longest span of 12 ft (3.7 m) and a deck 26 ft wide.

Who owns Nfa A011 over Slippery Branch?

It is owned by the County Highway Agency.