US Bridges

Nfa A161 over Lewis Branch

Fair

Houston County, Tennessee · 3.5 M. S. Tenn. Ridge. · Structure no. 420A1610001

Built
1986
39 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete Continuous
Length
56 ft
3 main spans
Daily traffic
50
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A161 over Lewis Branch is a concrete continuous culvert carrying Nfa A161 over Lewis Branch in Houston 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 50 vehicles a day, roughly 2% of them trucks, projected to reach 80 by 2042. The structure is 56 ft (17.1 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNfa A161
CrossesLewis Branch
Location3.5 M. S. Tenn. Ridge.
RouteCounty Highway 161
CountyHouston County
StateTennessee
Coordinates36.28175, -87.79415
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.2 US tons
Inventory rating67.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span15 ft (4.6 m)
Deck width27 ft (8.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2020)
Projected traffic80 by 2042
Trucks2%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A161 over Lewis Branch built?

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

What condition is Nfa A161 over Lewis 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 February 2024.

How much traffic does Nfa A161 over Lewis Branch carry?

About 50 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A161 over Lewis Branch?

The structure is 56 ft (17.1 m) long with a longest span of 15 ft (4.6 m) and a deck 27 ft wide.

Who owns Nfa A161 over Lewis Branch?

It is owned by the County Highway Agency.