US Bridges

SR368 23rd Street over Posten Bayou

Fair

Bay County, Florida · 1.0 Mi. East of US98 SR30 · Structure no. 460075

Built
1989
36 years old
Condition
Fair
inspected September 2024
Type
Slab
Concrete Continuous
Length
265 ft
9 main spans
Daily traffic
25,000
2022 count
Owner
State
State Highway Agency

About this bridge

SR368 23rd Street over Posten Bayou is a concrete continuous slab carrying SR368 23rd Street over Posten Bayou in Bay County, Florida. It was built in 1989, so it is 36 years old, younger 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 25,000 vehicles a day, roughly 4% of them trucks, projected to reach 43,375 by 2044. The structure is 265 ft (80.8 m) long and 83 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSR368 23rd Street
CrossesPosten Bayou
Location1.0 Mi. East of US98 SR30
RouteState Highway 368
StateFlorida
Coordinates30.18997, -85.71653
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95.7 US tons
Inventory rating57.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20
Structure length265 ft (80.8 m)
Longest span31 ft (9.3 m)
Deck width83 ft (25.3 m)
Roadway width67 ft (20.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,000 (2022)
Projected traffic43,375 by 2044
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 SR368 23rd Street over Posten Bayou built?

It was built in 1989, making it 36 years old in 2025.

What condition is SR368 23rd Street over Posten Bayou 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 2024.

How much traffic does SR368 23rd Street over Posten Bayou carry?

About 25,000 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is SR368 23rd Street over Posten Bayou?

The structure is 265 ft (80.8 m) long with a longest span of 31 ft (9.3 m) and a deck 83 ft wide.

Who owns SR368 23rd Street over Posten Bayou?

It is owned by the State Highway Agency.