US Bridges

SR20 over Big Creek

Fair

Liberty County, Florida · 0.5 Mile East of SR 65 · Structure no. 560063

Built
1997
28 years old
Condition
Fair
inspected November 2024
Type
Slab
Concrete Continuous
Length
252 ft
9 main spans
Daily traffic
3,900
2022 count
Owner
State
State Highway Agency

About this bridge

SR20 over Big Creek is a concrete continuous slab carrying SR20 over Big Creek in Liberty County, Florida. It was built in 1997, so it is 28 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 3,900 vehicles a day, roughly 20% of them trucks, projected to reach 6,766 by 2044. The structure is 252 ft (76.8 m) long and 47 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

CarriesSR20
CrossesBig Creek
Location0.5 Mile East of SR 65
RouteState Highway 20
StateFlorida
Coordinates30.38888, -84.78939
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.7 US tons
Inventory rating40 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20 + Mod
Structure length252 ft (76.8 m)
Longest span29 ft (8.8 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,900 (2022)
Projected traffic6,766 by 2044
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 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 Big Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is SR20 over Big 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 November 2024.

How much traffic does SR20 over Big Creek carry?

About 3,900 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is SR20 over Big Creek?

The structure is 252 ft (76.8 m) long with a longest span of 29 ft (8.8 m) and a deck 47 ft wide.

Who owns SR20 over Big Creek?

It is owned by the State Highway Agency.