US Bridges

S55-MACAR Off Ramp over Macarthur Strm Channel

Fair

Orange County, California · 12-ORA-055-R7.14-SA · Structure no. 55 0497K

Built
1966
59 years old
Condition
Fair
inspected February 2022
Type
Culvert
Concrete
Length
44 ft
2 main spans
Daily traffic
19,200
2014 count
Owner
State
State Highway Agency

About this bridge

S55-MACAR Off Ramp over Macarthur Strm Channel is a concrete culvert carrying S55-MACAR Off Ramp over Macarthur Strm Channel in Orange County, California. It was built in 1966, so it is 59 years old, older 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 6 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 19,200 vehicles a day, roughly 3% of them trucks, projected to reach 23,807 by 2044. The structure is 44 ft (13.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS55-MACAR Off Ramp
CrossesMacarthur Strm Channel
Location12-ORA-055-R7.14-SA
RouteState Highway 55
CountyOrange County
StateCalifornia
Coordinates33.70029, -117.86061
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length44 ft (13.4 m)
Longest span23 ft (7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,200 (2014)
Projected traffic23,807 by 2044
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 S55-MACAR Off Ramp over Macarthur Strm Channel built?

It was built in 1966, making it 59 years old in 2025.

What condition is S55-MACAR Off Ramp over Macarthur Strm Channel 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 February 2022.

How much traffic does S55-MACAR Off Ramp over Macarthur Strm Channel carry?

About 19,200 vehicles per day (2014 count), of which roughly 3% are trucks.

How long is S55-MACAR Off Ramp over Macarthur Strm Channel?

The structure is 44 ft (13.4 m) long with a longest span of 23 ft (7 m).

Who owns S55-MACAR Off Ramp over Macarthur Strm Channel?

It is owned by the State Highway Agency.