US Bridges

SR 90 (imperial) over Loftus Diversion Channel

Fair

Orange County, California · 12-ORA-090-5.63-BRE · Structure no. 55 0222

Built
1970
55 years old, rebuilt 1972
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
44,500
2020 count
Owner
State
State Highway Agency

About this bridge

SR 90 (imperial) over Loftus Diversion Channel is a concrete culvert carrying SR 90 (imperial) over Loftus Diversion Channel in Orange County, California. It was built in 1970 and reconstructed in 1972, 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 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 44,500 vehicles a day, roughly 6% of them trucks, projected to reach 51,856 by 2040. The structure is 21 ft (6.4 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 90 (imperial)
CrossesLoftus Diversion Channel
Location12-ORA-090-5.63-BRE
RouteState Highway 90
CountyOrange County
StateCalifornia
Coordinates33.91065, -117.88064
Functional classUrban Other Principal Arterial

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 inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span11 ft (3.4 m)
Deck width84 ft (25.6 m)
Roadway width83 ft (25.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,500 (2020)
Projected traffic51,856 by 2040
Trucks6%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 SR 90 (imperial) over Loftus Diversion Channel built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1972.

What condition is SR 90 (imperial) over Loftus Diversion 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 September 2023.

How much traffic does SR 90 (imperial) over Loftus Diversion Channel carry?

About 44,500 vehicles per day (2020 count), of which roughly 6% are trucks.

How long is SR 90 (imperial) over Loftus Diversion Channel?

The structure is 21 ft (6.4 m) long with a longest span of 11 ft (3.4 m) and a deck 84 ft wide.

Who owns SR 90 (imperial) over Loftus Diversion Channel?

It is owned by the State Highway Agency.