US Bridges

Nfa K641 over Overflow

Fair

Shelby County, Tennessee · 1.26 Mi. N of SR-1 Jct. · Structure no. 79S80740029

Built
1960
65 years old
Condition
Fair
inspected May 2023
Type
Channel Beam
Concrete
Length
85 ft
5 main spans
Daily traffic
3,132
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa K641 over Overflow is a concrete channel beam carrying Nfa K641 over Overflow 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 3,132 vehicles a day, roughly 13% of them trucks, projected to reach 2,918 by 2041. The structure is 85 ft (25.9 m) long and 32 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa K641
CrossesOverflow
Location1.26 Mi. N of SR-1 Jct.
RouteCounty Highway 641
CountyShelby County
StateTennessee
Coordinates35.31528, -89.67178
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum 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 width32 ft (9.9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,132 (2021)
Projected traffic2,918 by 2041
Trucks13%
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 of existing bridge without deck rehabilitation
Estimated improvement cost$157,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa K641 over Overflow built?

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

What condition is Nfa K641 over Overflow 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 K641 over Overflow carry?

About 3,132 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is Nfa K641 over Overflow?

The structure is 85 ft (25.9 m) long with a longest span of 17 ft (5.2 m) and a deck 32 ft wide.

Who owns Nfa K641 over Overflow?

It is owned by the County Highway Agency.