US Bridges

Nfa 942 (sa 5109) over Slippery Branch

Fair

Lewis County, Tennessee · 5 M. Nw. Hohenwald. · Structure no. 51S61790001

Built
1960
65 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
430
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 942 (sa 5109) over Slippery Branch is a concrete continuous culvert carrying Nfa 942 (sa 5109) over Slippery Branch in Lewis 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 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 430 vehicles a day, roughly 3% of them trucks, projected to reach 744 by 2041. The structure is 40 ft (12.2 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 942 (sa 5109)
CrossesSlippery Branch
Location5 M. Nw. Hohenwald.
RouteCounty Highway 942
CountyLewis County
StateTennessee
Coordinates35.61528, -87.58853
Functional classRural Minor Collector

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating89.3 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic430 (2021)
Projected traffic744 by 2041
Trucks3%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 942 (sa 5109) over Slippery Branch built?

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

What condition is Nfa 942 (sa 5109) 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 942 (sa 5109) over Slippery Branch carry?

About 430 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 942 (sa 5109) over Slippery Branch?

The structure is 40 ft (12.2 m) long with a longest span of 12 ft (3.7 m).

Who owns Nfa 942 (sa 5109) over Slippery Branch?

It is owned by the County Highway Agency.