US Bridges

Nfa 971 (sa 6313) over Branch

Fair

Montgomery County, Tennessee · 6 MI N Cunningham · Structure no. 63S63630005

Built
1963
62 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
146 ft
3 main spans
Daily traffic
2,364
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 971 (sa 6313) over Branch is a prestressed concrete stringer/multi-beam or girder carrying Nfa 971 (sa 6313) over Branch in Montgomery County, Tennessee. It was built in 1963, so it is 62 years old, older 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 6 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 2,364 vehicles a day, roughly 3% of them trucks, projected to reach 3,610 by 2041. The structure is 146 ft (44.5 m) long and 29 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 971 (sa 6313)
CrossesBranch
Location6 MI N Cunningham
RouteCounty Highway 971
CountyMontgomery County
StateTennessee
Coordinates36.48553, -87.38305
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33.2 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length146 ft (44.5 m)
Longest span48 ft (14.6 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,364 (2021)
Projected traffic3,610 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.3 million (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 971 (sa 6313) over Branch built?

It was built in 1963, making it 62 years old in 2025.

What condition is Nfa 971 (sa 6313) over Branch 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 October 2024.

How much traffic does Nfa 971 (sa 6313) over Branch carry?

About 2,364 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 971 (sa 6313) over Branch?

The structure is 146 ft (44.5 m) long with a longest span of 48 ft (14.6 m) and a deck 29 ft wide.

Who owns Nfa 971 (sa 6313) over Branch?

It is owned by the County Highway Agency.