US Bridges

Macarthur Departur over RTE 55 Arrivals Ramp

Fair

Orange County, California · Ne/O Departures Viaduct · Structure no. 55C0657

Built
1990
35 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
281 ft
4 main spans
Daily traffic
8,000
2020 count
Owner
Local
Other Local Agency

About this bridge

Macarthur Departur over RTE 55 Arrivals Ramp is a concrete continuous box beam or girders - multiple carrying Macarthur Departur over RTE 55 Arrivals Ramp in Orange County, California. It was built in 1990, so it is 35 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 8,000 vehicles a day, roughly 1% of them trucks, projected to reach 17,100 by 2041. The structure is 281 ft (85.7 m) long and 33 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesMacarthur Departur
CrossesRTE 55 Arrivals Ramp
LocationNe/O Departures Viaduct
CountyOrange County
StateCalifornia
Coordinates33.68261, -117.85822
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length281 ft (85.7 m)
Longest span70 ft (21.3 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2020)
Projected traffic17,100 by 2041
Trucks1%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Macarthur Departur over RTE 55 Arrivals Ramp built?

It was built in 1990, making it 35 years old in 2025.

What condition is Macarthur Departur over RTE 55 Arrivals Ramp 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 April 2024.

How much traffic does Macarthur Departur over RTE 55 Arrivals Ramp carry?

About 8,000 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Macarthur Departur over RTE 55 Arrivals Ramp?

The structure is 281 ft (85.7 m) long with a longest span of 70 ft (21.3 m) and a deck 33 ft wide.

Who owns Macarthur Departur over RTE 55 Arrivals Ramp?

It is owned by the Other Local Agency.