US Bridges

Nfa K639 over Branch

Fair

Shelby County, Tennessee · Collierville-Arlington RD · Structure no. 790A1520001

Built
1958
67 years old
Condition
Fair
inspected May 2023
Type
Channel Beam
Concrete
Length
51 ft
3 main spans
Daily traffic
1,288
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa K639 over Branch is a concrete channel beam carrying Nfa K639 over Branch in Shelby County, Tennessee. It was built in 1958, so it is 67 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 5 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 1,288 vehicles a day, roughly 3% of them trucks, projected to reach 1,808 by 2041. The structure is 51 ft (15.5 m) long and 32 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesNfa K639
CrossesBranch
LocationCollierville-Arlington RD
RouteCounty Highway 639
CountyShelby County
StateTennessee
Coordinates35.34958, -89.67439
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length51 ft (15.5 m)
Longest span17 ft (5.2 m)
Deck width32 ft (9.9 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,288 (2021)
Projected traffic1,808 by 2041
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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$412,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa K639 over Branch built?

It was built in 1958, making it 67 years old in 2025.

What condition is Nfa K639 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 May 2023.

How much traffic does Nfa K639 over Branch carry?

About 1,288 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa K639 over Branch?

The structure is 51 ft (15.5 m) long with a longest span of 17 ft (5.2 m) and a deck 32 ft wide.

Who owns Nfa K639 over Branch?

It is owned by the County Highway Agency.