US Bridges

I-75 over CR-329

Fair

Marion County, Florida · I-75 NB over CR-329 · Structure no. 360036

Built
1964
61 years old, rebuilt 1997
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
165 ft
3 main spans
Daily traffic
34,250
2022 count
Owner
State
State Highway Agency

About this bridge

I-75 over CR-329 is a prestressed concrete stringer/multi-beam or girder carrying I-75 over CR-329 in Marion County, Florida. It was built in 1964 and reconstructed in 1997, so it is 61 years old, older than the Florida average of 41.3 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 34,250 vehicles a day, roughly 24% of them trucks, projected to reach 59,424 by 2044. The structure is 165 ft (50.4 m) long and 60 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI-75
CrossesCR-329
LocationI-75 NB over CR-329
RouteInterstate 75
StateFlorida
Coordinates29.34774, -82.21912
Functional classRural Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.6 US tons
Inventory rating38.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length165 ft (50.4 m)
Longest span61 ft (18.6 m)
Deck width60 ft (18.3 m)
Roadway width57 ft (17.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,250 (2022)
Projected traffic59,424 by 2044
Trucks24%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-75 over CR-329 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1997.

What condition is I-75 over CR-329 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 I-75 over CR-329 carry?

About 34,250 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is I-75 over CR-329?

The structure is 165 ft (50.4 m) long with a longest span of 61 ft (18.6 m) and a deck 60 ft wide.

Who owns I-75 over CR-329?

It is owned by the State Highway Agency.