US Bridges

Nfa K640 over Branch

Fair

Shelby County, Tennessee · Gallaway Levee Rd-Shelby · Structure no. 790A0110001

Built
1960
65 years old
Condition
Fair
inspected May 2023
Type
Channel Beam
Concrete
Length
85 ft
5 main spans
Daily traffic
461
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa K640 over Branch is a concrete channel beam carrying Nfa K640 over Branch in Shelby County, Tennessee. It was built in 1960, so it is 65 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 461 vehicles a day, roughly 13% of them trucks, projected to reach 336 by 2041. The structure is 85 ft (25.9 m) long and 34 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNfa K640
CrossesBranch
LocationGallaway Levee Rd-Shelby
RouteCounty Highway 640
CountyShelby County
StateTennessee
Coordinates35.32064, -89.66608
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 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 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 spans5
Design loadH 15
Structure length85 ft (25.9 m)
Longest span17 ft (5.2 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic461 (2021)
Projected traffic336 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 K640 over Branch built?

It was built in 1960, making it 65 years old in 2025.

What condition is Nfa K640 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 K640 over Branch carry?

About 461 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is Nfa K640 over Branch?

The structure is 85 ft (25.9 m) long with a longest span of 17 ft (5.2 m) and a deck 34 ft wide.

Who owns Nfa K640 over Branch?

It is owned by the County Highway Agency.