US Bridges

Nfa 1230 (sa 7321) over Branch

Good

Roane County, Tennessee · 2 M S of SR 61-SR 62 JCT · Structure no. 73S24730003

Built
1950
75 years old, rebuilt 2001
Condition
Good
inspected March 2023
Type
Slab
Concrete Continuous
Length
40 ft
3 main spans
Daily traffic
1,167
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1230 (sa 7321) over Branch is a concrete continuous slab carrying Nfa 1230 (sa 7321) over Branch in Roane County, Tennessee. It was built in 1950 and reconstructed in 2001, so it is 75 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 1,167 vehicles a day, roughly 3% of them trucks, projected to reach 2,139 by 2041. The structure is 40 ft (12.2 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesNfa 1230 (sa 7321)
CrossesBranch
Location2 M S of SR 61-SR 62 JCT
RouteCounty Highway 1230
CountyRoane County
StateTennessee
Coordinates36.03068, -84.34807
Functional classUrban Collector

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 inspectionMarch 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 rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length40 ft (12.2 m)
Longest span11 ft (3.4 m)
Deck width33 ft (10 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,167 (2021)
Projected traffic2,139 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 1230 (sa 7321) over Branch built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2001.

What condition is Nfa 1230 (sa 7321) 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 March 2023.

How much traffic does Nfa 1230 (sa 7321) over Branch carry?

About 1,167 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1230 (sa 7321) over Branch?

The structure is 40 ft (12.2 m) long with a longest span of 11 ft (3.4 m) and a deck 33 ft wide.

Who owns Nfa 1230 (sa 7321) over Branch?

It is owned by the County Highway Agency.