US Bridges

SR-31 over Prairie Creek

Good

DeSoto County, Florida · 12.0 MI South of SR-70 · Structure no. 040055

Built
1999
26 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
305 ft
7 main spans
Daily traffic
4,800
2022 count
Owner
State
State Highway Agency

About this bridge

SR-31 over Prairie Creek is a prestressed concrete stringer/multi-beam or girder carrying SR-31 over Prairie Creek in DeSoto County, Florida. It was built in 1999, so it is 26 years old, younger than the Florida average of 41.3 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,800 vehicles a day, roughly 38% of them trucks, projected to reach 8,328 by 2044. The structure is 305 ft (93 m) long and 46 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

CarriesSR-31
CrossesPrairie Creek
Location12.0 MI South of SR-70
RouteState Highway 31
StateFlorida
Coordinates27.05186, -81.78427
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.1 US tons
Inventory rating40.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20 + Mod
Structure length305 ft (93 m)
Longest span45 ft (13.7 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,800 (2022)
Projected traffic8,328 by 2044
Trucks38%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 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 SR-31 over Prairie Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is SR-31 over Prairie Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does SR-31 over Prairie Creek carry?

About 4,800 vehicles per day (2022 count), of which roughly 38% are trucks.

How long is SR-31 over Prairie Creek?

The structure is 305 ft (93 m) long with a longest span of 45 ft (13.7 m) and a deck 46 ft wide.

Who owns SR-31 over Prairie Creek?

It is owned by the State Highway Agency.