US Bridges

Nfa B001 over Doe River

Fair

Carter County, Tennessee · Just W. of Roan Mtn. · Structure no. 100B0010001

Built
2021
4 years old
Condition
Fair
inspected June 2023
Type
Frame
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
270
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa B001 over Doe River is a prestressed concrete frame carrying Nfa B001 over Doe River in Carter County, Tennessee. It was built in 2021, so it is 4 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 270 vehicles a day, roughly 2% of them trucks, projected to reach 432 by 2042. The structure is 49 ft (14.9 m) long and 30 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNfa B001
CrossesDoe River
LocationJust W. of Roan Mtn.
RouteCounty Highway 1
CountyCarter County
StateTennessee
Coordinates36.20245, -82.08062
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeFrame
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length49 ft (14.9 m)
Longest span46 ft (14 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic270 (2020)
Projected traffic432 by 2042
Trucks2%
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$673,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa B001 over Doe River built?

It was built in 2021, making it 4 years old in 2025.

What condition is Nfa B001 over Doe River 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 B001 over Doe River carry?

About 270 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa B001 over Doe River?

The structure is 49 ft (14.9 m) long with a longest span of 46 ft (14 m) and a deck 30 ft wide.

Who owns Nfa B001 over Doe River?

It is owned by the County Highway Agency.