US Bridges

Miraloma Ave over State Route 57

Fair

Orange County, California · 12-ORA-057-15.90-ANA · Structure no. 55 0855

Built
1998
27 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
390 ft
2 main spans
Daily traffic
10,000
2014 count
Owner
State
State Highway Agency

About this bridge

Miraloma Ave over State Route 57 is a prestressed concrete continuous box beam or girders - multiple carrying Miraloma Ave over State Route 57 in Orange County, California. It was built in 1998, so it is 27 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 10,000 vehicles a day, roughly 3% of them trucks, projected to reach 12,034 by 2044. The structure is 390 ft (118.9 m) long and 76 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMiraloma Ave
CrossesState Route 57
Location12-ORA-057-15.90-ANA
RouteCity Street 0
Coordinates33.85371, -117.87616
Functional classUrban Collector

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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating25 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length390 ft (118.9 m)
Longest span208 ft (63.4 m)
Deck width76 ft (23.2 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deck19 ft (5.9 m)

Traffic and service

Average daily traffic10,000 (2014)
Projected traffic12,034 by 2044
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Miraloma Ave over State Route 57 built?

It was built in 1998, making it 27 years old in 2025.

What condition is Miraloma Ave over State Route 57 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 January 2024.

How much traffic does Miraloma Ave over State Route 57 carry?

About 10,000 vehicles per day (2014 count), of which roughly 3% are trucks.

How long is Miraloma Ave over State Route 57?

The structure is 390 ft (118.9 m) long with a longest span of 208 ft (63.4 m) and a deck 76 ft wide.

Who owns Miraloma Ave over State Route 57?

It is owned by the State Highway Agency.