US Bridges

NB I-95 (SR-9) over St. Lucie Canal

Fair

Martin County, Florida · 1MI N of SR-76(KANNER Hw) · Structure no. 890133

Built
1987
38 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
907 ft
9 main spans
Daily traffic
41,500
2023 count
Owner
State
State Highway Agency

About this bridge

NB I-95 (SR-9) over St. Lucie Canal is a prestressed concrete stringer/multi-beam or girder carrying NB I-95 (SR-9) over St. Lucie Canal in Martin County, Florida. It was built in 1987, so it is 38 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 5 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 41,500 vehicles a day, roughly 24% of them trucks, projected to reach 72,003 by 2045. The structure is 907 ft (276.5 m) long and 59 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesNB I-95 (SR-9)
CrossesSt. Lucie Canal
Location1MI N of SR-76(KANNER Hw)
RouteInterstate 95
CountyMartin County
StateFlorida
Coordinates27.12013, -80.27005
Functional classUrban Principal Arterial - Interstate

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98.1 US tons
Inventory rating60.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans9
Design loadHS 20 + Mod
Structure length907 ft (276.5 m)
Longest span139 ft (42.4 m)
Deck width59 ft (17.9 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,500 (2023)
Projected traffic72,003 by 2045
Trucks24%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 NB I-95 (SR-9) over St. Lucie Canal built?

It was built in 1987, making it 38 years old in 2025.

What condition is NB I-95 (SR-9) 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 2024.

How much traffic does NB I-95 (SR-9) over St. Lucie Canal carry?

About 41,500 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is NB I-95 (SR-9) over St. Lucie Canal?

The structure is 907 ft (276.5 m) long with a longest span of 139 ft (42.4 m) and a deck 59 ft wide.

Who owns NB I-95 (SR-9) over St. Lucie Canal?

It is owned by the State Highway Agency.