US Bridges

I-75 SB & Ramp B over Buffalo Canal

Fair

Manatee County, Florida · 800FT. South of I-275 · Structure no. 130108

Built
1981
44 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete Continuous
Length
110 ft
4 main spans
Daily traffic
50,000
2023 count
Owner
State
State Highway Agency

About this bridge

I-75 SB & Ramp B over Buffalo Canal is a concrete continuous slab carrying I-75 SB & Ramp B over Buffalo Canal in Manatee County, Florida. It was built in 1981, so it is 44 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 50,000 vehicles a day, roughly 12% of them trucks, projected to reach 86,750 by 2042. The structure is 110 ft (33.5 m) long and 86 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI-75 SB & Ramp B
CrossesBuffalo Canal
Location800FT. South of I-275
RouteInterstate 75
CountyManatee County
StateFlorida
Coordinates27.58003, -82.51494
Functional classUrban 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.4 US tons
Inventory rating39.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length110 ft (33.5 m)
Longest span31 ft (9.3 m)
Deck width86 ft (26.2 m)
Roadway width83 ft (25.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50,000 (2023)
Projected traffic86,750 by 2042
Trucks12%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-75 SB & Ramp B over Buffalo Canal built?

It was built in 1981, making it 44 years old in 2025.

What condition is I-75 SB & Ramp B over Buffalo Canal 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 I-75 SB & Ramp B over Buffalo Canal carry?

About 50,000 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is I-75 SB & Ramp B over Buffalo Canal?

The structure is 110 ft (33.5 m) long with a longest span of 31 ft (9.3 m) and a deck 86 ft wide.

Who owns I-75 SB & Ramp B over Buffalo Canal?

It is owned by the State Highway Agency.