US Bridges

Nfa B639 over Branch

Good

Sumner County, Tennessee · In the City of Gallatin · Structure no. 830B6390001

Built
1990
35 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete Continuous
Length
42 ft
3 main spans
Daily traffic
630
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa B639 over Branch is a concrete continuous culvert carrying Nfa B639 over Branch in Sumner County, Tennessee. It was built in 1990, so it is 35 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 630 vehicles a day, roughly 1% of them trucks, projected to reach 1,008 by 2041. The structure is 42 ft (12.8 m) long and 36 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesNfa B639
CrossesBranch
LocationIn the City of Gallatin
RouteCity Street 0B639
Coordinates36.36833, -86.46605
Functional classUrban 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 protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.5 US tons
Inventory rating24.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span12 ft (3.7 m)
Deck width36 ft (11 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic630 (2020)
Projected traffic1,008 by 2041
Trucks1%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa B639 over Branch built?

It was built in 1990, making it 35 years old in 2025.

What condition is Nfa B639 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 January 2025.

How much traffic does Nfa B639 over Branch carry?

About 630 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Nfa B639 over Branch?

The structure is 42 ft (12.8 m) long with a longest span of 12 ft (3.7 m) and a deck 36 ft wide.

Who owns Nfa B639 over Branch?

It is owned by the City or Municipal Highway Agency.