US Bridges

SR20 over Rocky Bayou

Fair

Okaloosa County, Florida · 3.9 Miles W. County Line · Structure no. 570097

Built
2001
24 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
1,588 ft
25 main spans
Daily traffic
20,000
2022 count
Owner
State
State Highway Agency

About this bridge

SR20 over Rocky Bayou is a prestressed concrete continuous stringer/multi-beam or girder carrying SR20 over Rocky Bayou in Okaloosa County, Florida. It was built in 2001, so it is 24 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 20,000 vehicles a day, roughly 8% of them trucks, projected to reach 34,700 by 2044. The structure is 1,588 ft (483.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR20
CrossesRocky Bayou
Location3.9 Miles W. County Line
RouteState Highway 20
CountyOkaloosa County
StateFlorida
Coordinates30.50516, -86.43984
Functional classUrban Other Principal 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating97 US tons
Inventory rating58 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans25
Design loadHS 20
Structure length1,588 ft (483.9 m)
Longest span66 ft (20.1 m)
Deck width43 ft (13.2 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,000 (2022)
Projected traffic34,700 by 2044
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 SR20 over Rocky Bayou built?

It was built in 2001, making it 24 years old in 2025.

What condition is SR20 over Rocky 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 February 2025.

How much traffic does SR20 over Rocky Bayou carry?

About 20,000 vehicles per day (2022 count), of which roughly 8% are trucks.

How long is SR20 over Rocky Bayou?

The structure is 1,588 ft (483.9 m) long with a longest span of 66 ft (20.1 m) and a deck 43 ft wide.

Who owns SR20 over Rocky Bayou?

It is owned by the State Highway Agency.