US Bridges

SR 707 (dixie Hwy) over St. Lucie River

Fair

Martin County, Florida · 1/4MI W of New Roosevelt · Structure no. 890003

Built
1964
61 years old
Condition
Fair
inspected July 2024
Type
Movable - Bascule
Steel
Length
1,229 ft
1 main span
Daily traffic
11,400
2024 count
Owner
State
State Highway Agency

About this bridge

SR 707 (dixie Hwy) over St. Lucie River is a steel movable - bascule carrying SR 707 (dixie Hwy) over St. Lucie River in Martin County, Florida. It was built in 1964, so it is 61 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 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 11,400 vehicles a day, roughly 7% of them trucks, projected to reach 19,779 by 2044. The structure is 1,229 ft (374.7 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSR 707 (dixie Hwy)
CrossesSt. Lucie River
Location1/4MI W of New Roosevelt
RouteState Highway 707
CountyMartin County
StateFlorida
Coordinates27.20345, -80.26129
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.7 US tons
Inventory rating31 US tons

Structure

Structure typeMovable - Bascule
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+32 approach)
Design loadHS 20
Structure length1,229 ft (374.7 m)
Longest span94 ft (28.8 m)
Deck width37 ft (11.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck19 ft (5.9 m)

Traffic and service

Average daily traffic11,400 (2024)
Projected traffic19,779 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 707 (dixie Hwy) over St. Lucie River built?

It was built in 1964, making it 61 years old in 2025.

What condition is SR 707 (dixie Hwy) over St. Lucie 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 July 2024.

How much traffic does SR 707 (dixie Hwy) over St. Lucie River carry?

About 11,400 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is SR 707 (dixie Hwy) over St. Lucie River?

The structure is 1,229 ft (374.7 m) long with a longest span of 94 ft (28.8 m) and a deck 37 ft wide.

Who owns SR 707 (dixie Hwy) over St. Lucie River?

It is owned by the State Highway Agency.