US Bridges

SR-78 over Harney Pond Canal

Fair

Glades County, Florida · 500FT West of CR-721 · Structure no. 050011

Built
1960
65 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
287 ft
7 main spans
Daily traffic
4,500
2024 count
Owner
State
State Highway Agency

About this bridge

SR-78 over Harney Pond Canal is a prestressed concrete stringer/multi-beam or girder carrying SR-78 over Harney Pond Canal in Glades County, Florida. It was built in 1960, so it is 65 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 4,500 vehicles a day, roughly 29% of them trucks, projected to reach 7,808 by 2044. The structure is 287 ft (87.5 m) long and 34 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

CarriesSR-78
CrossesHarney Pond Canal
Location500FT West of CR-721
RouteState Highway 78
StateFlorida
Coordinates26.99994, -81.06889
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 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 alignment7: Better than present minimum criteria
Operating rating46.4 US tons
Inventory rating27.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length287 ft (87.5 m)
Longest span41 ft (12.5 m)
Deck width34 ft (10.5 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2024)
Projected traffic7,808 by 2044
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 km)
TollOn a free road
National Highway SystemNo

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-78 over Harney Pond Canal built?

It was built in 1960, making it 65 years old in 2025.

What condition is SR-78 over Harney Pond 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 February 2024.

How much traffic does SR-78 over Harney Pond Canal carry?

About 4,500 vehicles per day (2024 count), of which roughly 29% are trucks.

How long is SR-78 over Harney Pond Canal?

The structure is 287 ft (87.5 m) long with a longest span of 41 ft (12.5 m) and a deck 34 ft wide.

Who owns SR-78 over Harney Pond Canal?

It is owned by the State Highway Agency.