US Bridges

Island Way over Dana Point Harbor

Good

Orange County, California · 0.1 MI S/O Dana Pt Hbr DR · Structure no. 55C0561

Built
1970
55 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
205 ft
4 main spans
Daily traffic
3,510
2021 count
Owner
County
County Highway Agency

About this bridge

Island Way over Dana Point Harbor is a prestressed concrete box beam or girders - multiple carrying Island Way over Dana Point Harbor in Orange County, California. It was built in 1970, so it is 55 years old, older than the California average of 54.8 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 3,510 vehicles a day, roughly 1% of them trucks, projected to reach 3,176 by 2040. The structure is 205 ft (62.5 m) long and 41 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesIsland Way
CrossesDana Point Harbor
Location0.1 MI S/O Dana Pt Hbr DR
RouteCounty Highway 0
Coordinates33.45988, -117.69941
Functional classUrban Local

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 protection9 ExcellentNo problems noted.
Last inspectionFebruary 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length205 ft (62.5 m)
Longest span50 ft (15.2 m)
Deck width41 ft (12.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,510 (2021)
Projected traffic3,176 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed123.7 mi (199 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 Island Way over Dana Point Harbor built?

It was built in 1970, making it 55 years old in 2025.

What condition is Island Way over Dana Point Harbor 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 February 2023.

How much traffic does Island Way over Dana Point Harbor carry?

About 3,510 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Island Way over Dana Point Harbor?

The structure is 205 ft (62.5 m) long with a longest span of 50 ft (15.2 m) and a deck 41 ft wide.

Who owns Island Way over Dana Point Harbor?

It is owned by the County Highway Agency.