US Bridges

SR 91 Tpk SB 130.8 over ST Lucie Canal

Fair

Martin County, Florida · 3 MI South of SR 714 Exit · Structure no. 890066

Built
1957
68 years old, rebuilt 2005
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
2,750 ft
5 main spans
Daily traffic
26,350
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

SR 91 Tpk SB 130.8 over ST Lucie Canal is a steel stringer/multi-beam or girder carrying SR 91 Tpk SB 130.8 over ST Lucie Canal in Martin County, Florida. It was built in 1957 and reconstructed in 2005, so it is 68 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 26,350 vehicles a day, roughly 20% of them trucks, projected to reach 45,717 by 2042. The structure is 2,750 ft (838.2 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 91 Tpk SB 130.8
CrossesST Lucie Canal
Location3 MI South of SR 714 Exit
RouteState Highway 91
CountyMartin County
StateFlorida
Coordinates27.11767, -80.27494
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating72.8 US tons
Inventory rating43.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5 (+27 approach)
Design loadHS 20 + Mod
Structure length2,750 ft (838.2 m)
Longest span142 ft (43.3 m)
Deck width63 ft (19.2 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,350 (2023)
Projected traffic45,717 by 2042
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2.5 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 91 Tpk SB 130.8 over ST Lucie Canal built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2005.

What condition is SR 91 Tpk SB 130.8 over ST Lucie Canal 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 2023.

How much traffic does SR 91 Tpk SB 130.8 over ST Lucie Canal carry?

About 26,350 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is SR 91 Tpk SB 130.8 over ST Lucie Canal?

The structure is 2,750 ft (838.2 m) long with a longest span of 142 ft (43.3 m) and a deck 63 ft wide.

Who owns SR 91 Tpk SB 130.8 over ST Lucie Canal?

It is owned by the State Toll Authority.