US Bridges

SR-64 over Myakka River

Fair

Manatee County, Florida · 12.2 MI East of CR-675 · Structure no. 130088

Built
1974
51 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
47 ft
3 main spans
Daily traffic
5,800
2024 count
Owner
State
State Highway Agency

About this bridge

SR-64 over Myakka River is a concrete culvert carrying SR-64 over Myakka River in Manatee County, Florida. It was built in 1974, so it is 51 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 5,800 vehicles a day, roughly 21% of them trucks, projected to reach 7,250 by 2044. The structure is 47 ft (14.2 m) long and 50 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

CarriesSR-64
CrossesMyakka River
Location12.2 MI East of CR-675
RouteState Highway 64
StateFlorida
Coordinates27.45994, -82.11092
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.6 US tons
Inventory rating42.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20 + Mod
Structure length47 ft (14.2 m)
Longest span16 ft (4.9 m)
Deck width50 ft (15.3 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,800 (2024)
Projected traffic7,250 by 2044
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 km)
TollOn a free road
National Highway SystemYes

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 SR-64 over Myakka River built?

It was built in 1974, making it 51 years old in 2025.

What condition is SR-64 over Myakka River 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 2024.

How much traffic does SR-64 over Myakka River carry?

About 5,800 vehicles per day (2024 count), of which roughly 21% are trucks.

How long is SR-64 over Myakka River?

The structure is 47 ft (14.2 m) long with a longest span of 16 ft (4.9 m) and a deck 50 ft wide.

Who owns SR-64 over Myakka River?

It is owned by the State Highway Agency.