US Bridges

Island Rd. over Branch of Indian River

Good

Martin County, Florida · 100FT Eof Sewalls Pt. Rd. · Structure no. 895501

Built
1964
61 years old
Condition
Good
inspected October 2023
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
115
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Island Rd. over Branch of Indian River is a prestressed concrete slab carrying Island Rd. over Branch of Indian 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 115 vehicles a day, roughly 1% of them trucks, projected to reach 200 by 2042. The structure is 30 ft (9.1 m) long and 22 ft wide. If it were closed, the detour would be 100 mi (161 km).

CarriesIsland Rd.
CrossesBranch of Indian River
Location100FT Eof Sewalls Pt. Rd.
RouteCity Street 0
StateFlorida
Coordinates27.17921, -80.18753
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.9 US tons
Inventory rating21.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic115 (2023)
Projected traffic200 by 2042
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Island Rd. over Branch of Indian River built?

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

What condition is Island Rd. over Branch of Indian River 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 October 2023.

How much traffic does Island Rd. over Branch of Indian River carry?

About 115 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Island Rd. over Branch of Indian River?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 22 ft wide.

Who owns Island Rd. over Branch of Indian River?

It is owned by the Town or Township Highway Agency.