US Bridges

CR-708 over Drainage Canal

Good

Martin County, Florida · 1.7 Miles West of I-95 · Structure no. 894064

Built
2014
11 years old
Condition
Good
inspected January 2025
Type
Arch - Deck
Concrete
Length
40 ft
1 main span
Daily traffic
5,500
2023 count
Owner
County
County Highway Agency

About this bridge

CR-708 over Drainage Canal is a concrete arch - deck carrying CR-708 over Drainage Canal in Martin County, Florida. It was built in 2014, so it is 11 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 5,500 vehicles a day, roughly 9% of them trucks, projected to reach 9,543 by 2045. The structure is 40 ft (12.2 m) long and 52 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCR-708
CrossesDrainage Canal
Location1.7 Miles West of I-95
RouteCounty Highway 708
CountyMartin County
StateFlorida
Coordinates27.04769, -80.25286
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
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.2 US tons
Inventory rating41.6 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width52 ft (15.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,500 (2023)
Projected traffic9,543 by 2045
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 CR-708 over Drainage Canal built?

It was built in 2014, making it 11 years old in 2025.

What condition is CR-708 over Drainage Canal 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 January 2025.

How much traffic does CR-708 over Drainage Canal carry?

About 5,500 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is CR-708 over Drainage Canal?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 52 ft wide.

Who owns CR-708 over Drainage Canal?

It is owned by the County Highway Agency.