US Bridges

Holly Drive over Relief Canal

GoodPosted for load

Palm Beach County, Florida · 0.3MI W of ALT-A1A/SR-811 · Structure no. 937002

Built
1960
65 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete
Length
75 ft
5 main spans
Daily traffic
7,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Holly Drive over Relief Canal is a concrete slab carrying Holly Drive over Relief Canal in Palm Beach County, Florida. It was built in 1960, so it is 65 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. Its operating status is: posted for load restriction.

It carries about 7,000 vehicles a day, roughly 5% of them trucks, projected to reach 12,145 by 2045. The structure is 75 ft (22.9 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesHolly Drive
CrossesRelief Canal
Location0.3MI W of ALT-A1A/SR-811
RouteCity Street 0
StateFlorida
Coordinates26.82318, -80.09179
Functional classUrban 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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.7 US tons
Inventory rating23.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length75 ft (22.9 m)
Longest span15 ft (4.6 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,000 (2023)
Projected traffic12,145 by 2045
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Holly Drive over Relief Canal built?

It was built in 1960, making it 65 years old in 2025.

What condition is Holly Drive over Relief 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 September 2024.

How much traffic does Holly Drive over Relief Canal carry?

About 7,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Holly Drive over Relief Canal?

The structure is 75 ft (22.9 m) long with a longest span of 15 ft (4.6 m) and a deck 33 ft wide.

Who owns Holly Drive over Relief Canal?

It is owned by the City or Municipal Highway Agency.