US Bridges

Nfa A674 (sa 1003) over Doe River

Good

Carter County, Tennessee · In Roan Mountain · Structure no. 100A6740001

Built
1960
65 years old, rebuilt 1991
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
66 ft
1 main span
Daily traffic
1,670
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A674 (sa 1003) over Doe River is a prestressed concrete stringer/multi-beam or girder carrying Nfa A674 (sa 1003) over Doe River in Carter County, Tennessee. It was built in 1960 and reconstructed in 1991, 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 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 1,670 vehicles a day, roughly 2% of them trucks, projected to reach 2,672 by 2041. The structure is 66 ft (20 m) long and 25 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNfa A674 (sa 1003)
CrossesDoe River
LocationIn Roan Mountain
RouteCounty Highway 674
CountyCarter County
StateTennessee
Coordinates36.19445, -82.06758
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length66 ft (20 m)
Longest span63 ft (19.1 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,670 (2020)
Projected traffic2,672 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$292,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A674 (sa 1003) over Doe River built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1991.

What condition is Nfa A674 (sa 1003) over Doe River 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 July 2023.

How much traffic does Nfa A674 (sa 1003) over Doe River carry?

About 1,670 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A674 (sa 1003) over Doe River?

The structure is 66 ft (20 m) long with a longest span of 63 ft (19.1 m) and a deck 25 ft wide.

Who owns Nfa A674 (sa 1003) over Doe River?

It is owned by the County Highway Agency.