US Bridges

Nfa 973 (sa 6312) over Branch

FairPosted for load

Montgomery County, Tennessee · 5 MI Cunningham · Structure no. 63F00190001

Built
1935
90 years old
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
28 ft
1 main span
Daily traffic
7,478
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 973 (sa 6312) over Branch is a concrete culvert carrying Nfa 973 (sa 6312) over Branch in Montgomery County, Tennessee. It was built in 1935, so it is 90 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. Its operating status is: posted for load restriction.

It carries about 7,478 vehicles a day, roughly 3% of them trucks, projected to reach 11,965 by 2042. The structure is 28 ft (8.5 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa 973 (sa 6312)
CrossesBranch
Location5 MI Cunningham
RouteCounty Highway 973
CountyMontgomery County
StateTennessee
Coordinates36.47908, -87.3895
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating8.6 US tons
Inventory rating6.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width30 ft (9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,478 (2021)
Projected traffic11,965 by 2042
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$194,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 973 (sa 6312) over Branch built?

It was built in 1935, making it 90 years old in 2025.

What condition is Nfa 973 (sa 6312) 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 973 (sa 6312) over Branch carry?

About 7,478 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 973 (sa 6312) over Branch?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 30 ft wide.

Who owns Nfa 973 (sa 6312) over Branch?

It is owned by the County Highway Agency.