US Bridges

Nfa 1456 (sa 7909) over Grays Creek

Fair

Shelby County, Tennessee · Walnut Grove Road · Structure no. 79014560005

Built
1993
32 years old
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
172 ft
3 main spans
Daily traffic
16,054
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1456 (sa 7909) over Grays Creek is a prestressed concrete continuous box beam or girders - single or spread carrying Nfa 1456 (sa 7909) over Grays Creek in Shelby County, Tennessee. It was built in 1993, so it is 32 years old, younger 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 16,054 vehicles a day, roughly 4% of them trucks, projected to reach 25,504 by 2041. The structure is 172 ft (52.4 m) long and 56 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesNfa 1456 (sa 7909)
CrossesGrays Creek
LocationWalnut Grove Road
RouteCounty Highway 1456
Coordinates35.1295, -89.73867
Functional classUrban Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.5 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckCorrugated steel
Main spans3
Design loadHS 20
Structure length172 ft (52.4 m)
Longest span57 ft (17.5 m)
Deck width56 ft (17.1 m)
Roadway width45 ft (13.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,054 (2021)
Projected traffic25,504 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 1456 (sa 7909) over Grays Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is Nfa 1456 (sa 7909) over Grays Creek 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 1456 (sa 7909) over Grays Creek carry?

About 16,054 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Nfa 1456 (sa 7909) over Grays Creek?

The structure is 172 ft (52.4 m) long with a longest span of 57 ft (17.5 m) and a deck 56 ft wide.

Who owns Nfa 1456 (sa 7909) over Grays Creek?

It is owned by the County Highway Agency.