US Bridges

SR20 over Apalachicola River

Fair

Calhoun County, Florida · 1.9MI. East of SR71 · Structure no. 470052

Built
1998
27 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
8,362 ft
3 main spans
Daily traffic
5,266
2022 count
Owner
State
State Highway Agency

About this bridge

SR20 over Apalachicola River is a steel continuous stringer/multi-beam or girder carrying SR20 over Apalachicola River in Calhoun County, Florida. It was built in 1998, so it is 27 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 5,266 vehicles a day, roughly 14% of them trucks, projected to reach 9,136 by 2044. The structure is 8,362 ft (2,548.7 m) long and 50 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR20
CrossesApalachicola River
Location1.9MI. East of SR71
RouteState Highway 20
CountyCalhoun County
StateFlorida
Coordinates30.44196, -85.00552
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.9 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+70 approach)
Design loadHS 20 + Mod
Structure length8,362 ft (2,548.7 m)
Longest span280 ft (85.3 m)
Deck width50 ft (15.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,266 (2022)
Projected traffic9,136 by 2044
Trucks14%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR20 over Apalachicola River built?

It was built in 1998, making it 27 years old in 2025.

What condition is SR20 over Apalachicola River 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 October 2023.

How much traffic does SR20 over Apalachicola River carry?

About 5,266 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is SR20 over Apalachicola River?

The structure is 8,362 ft (2,548.7 m) long with a longest span of 280 ft (85.3 m) and a deck 50 ft wide.

Who owns SR20 over Apalachicola River?

It is owned by the State Highway Agency.