US Bridges

SR20 over Lafayette Creek

Fair

Walton County, Florida · 0.3 MI West of US331 SR83 · Structure no. 600920

Built
1968
57 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
250 ft
5 main spans
Daily traffic
21,000
2022 count
Owner
State
State Highway Agency

About this bridge

SR20 over Lafayette Creek is a prestressed concrete stringer/multi-beam or girder carrying SR20 over Lafayette Creek in Walton County, Florida. It was built in 1968, so it is 57 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 21,000 vehicles a day, roughly 9% of them trucks, projected to reach 36,435 by 2044. The structure is 250 ft (76.2 m) long and 46 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSR20
CrossesLafayette Creek
Location0.3 MI West of US331 SR83
RouteState Highway 20
CountyWalton County
StateFlorida
Coordinates30.49325, -86.12584
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to 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 rating92 US tons
Inventory rating55 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length250 ft (76.2 m)
Longest span50 ft (15.2 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,000 (2022)
Projected traffic36,435 by 2044
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Lafayette Creek built?

It was built in 1968, making it 57 years old in 2025.

What condition is SR20 over Lafayette Creek 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 SR20 over Lafayette Creek carry?

About 21,000 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is SR20 over Lafayette Creek?

The structure is 250 ft (76.2 m) long with a longest span of 50 ft (15.2 m) and a deck 46 ft wide.

Who owns SR20 over Lafayette Creek?

It is owned by the State Highway Agency.