US Bridges

Nfa A603 over Branch

Good

Carter County, Tennessee · N of SR173 near Co. Line · Structure no. 100A6030001

Built
1984
41 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete Continuous
Length
23 ft
2 main spans
Daily traffic
280
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A603 over Branch is a concrete continuous culvert carrying Nfa A603 over Branch in Carter County, Tennessee. It was built in 1984, so it is 41 years old, younger 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 280 vehicles a day, roughly 2% of them trucks, projected to reach 448 by 2041. The structure is 23 ft (7 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNfa A603
CrossesBranch
LocationN of SR173 near Co. Line
RouteCounty Highway 392
CountyCarter County
StateTennessee
Coordinates36.21673, -82.21629
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating96.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length23 ft (7 m)
Longest span11 ft (3.3 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic280 (2020)
Projected traffic448 by 2041
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$68,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A603 over Branch built?

It was built in 1984, making it 41 years old in 2025.

What condition is Nfa A603 over 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 August 2023.

How much traffic does Nfa A603 over Branch carry?

About 280 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A603 over Branch?

The structure is 23 ft (7 m) long with a longest span of 11 ft (3.3 m) and a deck 26 ft wide.

Who owns Nfa A603 over Branch?

It is owned by the County Highway Agency.