US Bridges

Nfa A170 over Averitt Branch

Good

Houston County, Tennessee · 2.8 M. S. Erin. · Structure no. 420A1700001

Built
1954
71 years old
Condition
Good
inspected January 2024
Type
Culvert
Concrete Continuous
Length
37 ft
2 main spans
Daily traffic
10
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A170 over Averitt Branch is a concrete continuous culvert carrying Nfa A170 over Averitt Branch in Houston County, Tennessee. It was built in 1954, so it is 71 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10 vehicles a day, roughly 2% of them trucks, projected to reach 16 by 2042. The structure is 37 ft (11.3 m) long and 14 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa A170
CrossesAveritt Branch
Location2.8 M. S. Erin.
RouteCounty Highway 170
CountyHouston County
StateTennessee
Coordinates36.27868, -87.67768
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.7 US tons
Inventory rating28.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length37 ft (11.3 m)
Longest span11 ft (3.4 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2020)
Projected traffic16 by 2042
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$173,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A170 over Averitt Branch built?

It was built in 1954, making it 71 years old in 2025.

What condition is Nfa A170 over Averitt Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does Nfa A170 over Averitt Branch carry?

About 10 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A170 over Averitt Branch?

The structure is 37 ft (11.3 m) long with a longest span of 11 ft (3.4 m) and a deck 14 ft wide.

Who owns Nfa A170 over Averitt Branch?

It is owned by the County Highway Agency.