US Bridges

Natchez Trace Park over U.S. Route 78

Fair

Lee County, Mississippi · 2.65 Miles South of U.S. · Structure no. 5570290P0000000

Built
1980
45 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
365 ft
4 main spans
Daily traffic
5,000
2024 count
Owner
Federal
National Park Service

About this bridge

Natchez Trace Park over U.S. Route 78 is a prestressed concrete continuous stringer/multi-beam or girder carrying Natchez Trace Park over U.S. Route 78 in Lee County, Mississippi. It was built in 1980, so it is 45 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 5,000 vehicles a day, roughly 1% of them trucks, projected to reach 5,500 by 2044. The structure is 365 ft (111.3 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNatchez Trace Park
CrossesU.S. Route 78
Location2.65 Miles South of U.S.
RouteFederal Lands Road 1
Coordinates34.29919, -88.72506
Functional classRural Minor Collector

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 rating60 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length365 ft (111.3 m)
Longest span110 ft (33.5 m)
Deck width45 ft (13.7 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,000 (2024)
Projected traffic5,500 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$180,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Natchez Trace Park over U.S. Route 78 built?

It was built in 1980, making it 45 years old in 2025.

What condition is Natchez Trace Park over U.S. Route 78 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 March 2023.

How much traffic does Natchez Trace Park over U.S. Route 78 carry?

About 5,000 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is Natchez Trace Park over U.S. Route 78?

The structure is 365 ft (111.3 m) long with a longest span of 110 ft (33.5 m) and a deck 45 ft wide.

Who owns Natchez Trace Park over U.S. Route 78?

It is owned by the National Park Service.