US Bridges

Nfa K521 over Workhouse Bayou

Good

Shelby County, Tennessee · Locust ST - Memphis · Structure no. 790B6300001

Built
1970
55 years old
Condition
Good
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
39 ft
1 main span
Daily traffic
200
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa K521 over Workhouse Bayou is a prestressed concrete box beam or girders - multiple carrying Nfa K521 over Workhouse Bayou in Shelby County, Tennessee. It was built in 1970, so it is 55 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 200 vehicles a day, roughly 2% of them trucks, projected to reach 320 by 2041. The structure is 39 ft (11.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNfa K521
CrossesWorkhouse Bayou
LocationLocust ST - Memphis
RouteCity Street 521
Coordinates35.17317, -89.95739
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span39 ft (11.9 m)
Deck width43 ft (13.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2020)
Projected traffic320 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 K521 over Workhouse Bayou built?

It was built in 1970, making it 55 years old in 2025.

What condition is Nfa K521 over Workhouse Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does Nfa K521 over Workhouse Bayou carry?

About 200 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa K521 over Workhouse Bayou?

The structure is 39 ft (11.9 m) long with a longest span of 39 ft (11.9 m) and a deck 43 ft wide.

Who owns Nfa K521 over Workhouse Bayou?

It is owned by the City or Municipal Highway Agency.