US Bridges

Ramp/Connector 405 over Lane Channel

Good

Orange County, California · 12-ORA-405-6.86-IRVN · Structure no. 55 0523S

Built
1968
57 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete
Length
39 ft
3 main spans
Daily traffic
240,000
2015 count
Owner
State
State Highway Agency

About this bridge

Ramp/Connector 405 over Lane Channel is a concrete culvert carrying Ramp/Connector 405 over Lane Channel in Orange County, California. It was built in 1968, so it is 57 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 240,000 vehicles a day, roughly 5% of them trucks, projected to reach 268,807 by 2045. The structure is 39 ft (11.9 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRamp/Connector 405
CrossesLane Channel
Location12-ORA-405-6.86-IRVN
RouteInterstate 405
CountyOrange County
StateCalifornia
Coordinates33.67643, -117.84108
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 spans3
Design loadHS 20
Structure length39 ft (11.9 m)
Longest span12 ft (3.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240,000 (2015)
Projected traffic268,807 by 2045
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Ramp/Connector 405 over Lane Channel built?

It was built in 1968, making it 57 years old in 2025.

What condition is Ramp/Connector 405 over Lane Channel 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 January 2025.

How much traffic does Ramp/Connector 405 over Lane Channel carry?

About 240,000 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Ramp/Connector 405 over Lane Channel?

The structure is 39 ft (11.9 m) long with a longest span of 12 ft (3.7 m) and a deck 43 ft wide.

Who owns Ramp/Connector 405 over Lane Channel?

It is owned by the State Highway Agency.