US Bridges

CR-731 over Gannet Slough

Fair

Glades County, Florida · 6.5 Miles North of CR-74 · Structure no. 050052

Built
1977
48 years old
Condition
Fair
inspected September 2023
Type
Slab
Prestressed Concrete
Length
181 ft
6 main spans
Daily traffic
300
2023 count
Owner
County
County Highway Agency

About this bridge

CR-731 over Gannet Slough is a prestressed concrete slab carrying CR-731 over Gannet Slough in Glades County, Florida. It was built in 1977, so it is 48 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 300 vehicles a day, roughly 24% of them trucks, projected to reach 521 by 2042. The structure is 181 ft (55.3 m) long and 36 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesCR-731
CrossesGannet Slough
Location6.5 Miles North of CR-74
RouteCounty Highway 731
CountyGlades County
StateFlorida
Coordinates27.01166, -81.45589
Functional classRural Major 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating30.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans6
Design loadHS 20
Structure length181 ft (55.3 m)
Longest span30 ft (9.1 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic521 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 CR-731 over Gannet Slough built?

It was built in 1977, making it 48 years old in 2025.

What condition is CR-731 over Gannet Slough 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 September 2023.

How much traffic does CR-731 over Gannet Slough carry?

About 300 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is CR-731 over Gannet Slough?

The structure is 181 ft (55.3 m) long with a longest span of 30 ft (9.1 m) and a deck 36 ft wide.

Who owns CR-731 over Gannet Slough?

It is owned by the County Highway Agency.