US Bridges

Eleven Mile Road over Ten Mile Creek

FairPosted for load

St. Lucie County, Florida · 0.8 MI S of SR-70 · Structure no. 940038

Built
1956
69 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
160 ft
8 main spans
Daily traffic
300
2023 count
Owner
County
County Highway Agency

About this bridge

Eleven Mile Road over Ten Mile Creek is a concrete slab carrying Eleven Mile Road over Ten Mile Creek in St. Lucie County, Florida. It was built in 1956, so it is 69 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. Its operating status is: posted for load restriction.

It carries about 300 vehicles a day, roughly 5% of them trucks, projected to reach 500 by 2042. The structure is 160 ft (48.8 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesEleven Mile Road
CrossesTen Mile Creek
Location0.8 MI S of SR-70
RouteCounty Highway 712B
StateFlorida
Coordinates27.38963, -80.44008
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.5 US tons
Inventory rating30.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans8
Design loadUnknown
Structure length160 ft (48.8 m)
Longest span20 ft (6.1 m)
Deck width29 ft (8.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic500 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Eleven Mile Road over Ten Mile Creek built?

It was built in 1956, making it 69 years old in 2025.

What condition is Eleven Mile Road over Ten Mile Creek 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 January 2025.

How much traffic does Eleven Mile Road over Ten Mile Creek carry?

About 300 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Eleven Mile Road over Ten Mile Creek?

The structure is 160 ft (48.8 m) long with a longest span of 20 ft (6.1 m) and a deck 29 ft wide.

Who owns Eleven Mile Road over Ten Mile Creek?

It is owned by the County Highway Agency.