US Bridges

US 78 over SR 302

Fair

DeSoto County, Mississippi · US 78 over SR 302 · Structure no. 21000780170026A

Built
1967
58 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
223 ft
3 main spans
Daily traffic
12,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 78 over SR 302 is a concrete continuous box beam or girders - single or spread carrying US 78 over SR 302 in DeSoto County, Mississippi. It was built in 1967, so it is 58 years old, older than the Mississippi average of 38.9 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 12,500 vehicles a day, roughly 26% of them trucks, projected to reach 13,000 by 2043. The structure is 223 ft (68 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 78
CrossesSR 302
LocationUS 78 over SR 302
RouteU.S. Route 78
CountyDeSoto County
StateMississippi
Coordinates34.96193, -89.85229
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating62.4 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length223 ft (68 m)
Longest span90 ft (27.4 m)
Deck width41 ft (12.4 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,500 (2023)
Projected traffic13,000 by 2043
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 78 over SR 302 built?

It was built in 1967, making it 58 years old in 2025.

What condition is US 78 over SR 302 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 April 2023.

How much traffic does US 78 over SR 302 carry?

About 12,500 vehicles per day (2023 count), of which roughly 26% are trucks.

How long is US 78 over SR 302?

The structure is 223 ft (68 m) long with a longest span of 90 ft (27.4 m) and a deck 41 ft wide.

Who owns US 78 over SR 302?

It is owned by the State Highway Agency.