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I-405 Improvement Project construction alert: Week of June 22

For more information about this project, please contact the 405 Community Outreach Team at [email protected] or 888-400-8994, or visit octa.net/405improvement.

To view and print a detailed list of closures and detours CLICK HERE!

Click to see closures and detours on the interactive map.

REMINDER! Edwards Street Bridge closed for approximately ONE YEAR

The Edwards Street bridge closed Tuesday, June 23, for approximately 12 months in anticipation of demolition.

Edwards Street Bridge Demolition

Crews will demolish the Edwards bridge over two nights, under full freeway closures. The bridge will be reconstructed in one stage.

Additional nighttime demolition will occur for several weeks under freeway lane closures. Some daytime demolition also is anticipated.

Night One:
10 p.m. Saturday, June 27, to 9 a.m. Sunday, June 28

Night Two:
10 p.m. Saturday, July 11, to 9 a.m. Sunday, July 13

UPDATE! NB I-405 off-ramp to Seal Beach Boulevard to close for approximately one month

The NB I-405 off-ramp to Seal Beach Boulevard is scheduled to close for approximately one month. The ramp will be reconstructed as part of the freeway widening.

The ramp is scheduled to close at 5 a.m. Monday, June 29, and reopen July 29.

REMINDER! NB I-405 Loop On-ramp from Goldenwest Street is closed for approximately THREE MONTHS

The NB I-405 loop on-ramp from Goldenwest Street is closed for approximately three months. The ramp will be reconstructed as part of the freeway widening.

The ramp is scheduled to reopen Oct. 2

UPDATE! Northbound (NB) I-405 Freeway closures for Bushard Street bridge water line installation

Crews will install a temporary waterline in the new Bushard bridge over I-405.

This work will require a full NB freeway closure between Slater Avenue and Warner Avenue.

The closure is set for 10 p.m. to 5:30 a.m. Wednesday, June 24

UPDATE! Southbound (SB) I-405 Freeway closures for Bushard Street bridge water line installation

Crews will install a temporary waterline in the new Bushard bridge over I-405.

This work will require a full SB freeway closure between Warner Avenue and Brookhurst Street.

The closures are set for 10 p.m. to 5:30 a.m. Thursday, June 25, and again Friday, June 26.

UPDATE! Southbound (SB) I-405 full freeway closures for Talbert Avenue bridge falsework construction

Crews will construct the falsework for the Talbert bridge over I-405.

This work will require a full SB freeway closure between Brookhurst Street and Euclid Street.

The closures are ongoing 10 p.m. to 5:30 a.m., and will continue for approximately two weeks.

UPDATE! Northbound (NB) I-405 full freeway closures for Talbert Avenue bridge falsework construction

Crews will construct the falsework for the Talbert bridge over I-405.

This work will require a full NB freeway closure between Euclid Street and Brookhurst Street.

The closures are set for 10 p.m. to 5:30 a.m. and will commence after the SB side is complete.

UPDATE! Southbound (SB) I-405 Freeway closures for Westminster Boulevard bridge falsework removal

Crews will remove the falsework from the Westminster bridge over I-405.

This work will require a full SB freeway closures at the Westminster bridge.

The closures are set for 10 p.m. to 5:30 a.m., Monday, June 29, and will continue for approximately two weeks.

UPDATE! Northbound (NB) I-405 Freeway closures Westminster Boulevard bridge falsework removal

Crews will remove the falsework from the Westminster bridge over I-405.

This work will require a full NB freeway closure at the Westminster bridge.

The closures are set for 10 p.m. to 5:30 a.m. and will commence after the SB side is complete.

UPDATE! Nightly Bolsa Avenue bridge closures are set to continue

Crews are installing a temporary waterline in the Bolsa Avenue bridge over I-405. This work requires nightly bridge closures for approximately two more weeks.

Nightly closures are set for 9:30 p.m. to 6 a.m.

UPDATE! Northbound (NB) Euclid Street closures are set to continue this week

Crews are closing NB Euclid between Mt. Washington Street/Condor Street and the freeway ramps to stage equipment for construction activities.

Nightly closures are set for 10 p.m. to 5 a.m. and will continue through Friday, July 3.

UPDATE! SB I-405 Goldenwest Street on- and off-ramps are now OPEN

The SB I-405 off-ramp to Goldenwest and the SB I-405 loop on-ramp from Goldenwest are now open to traffic.

UPDATE! Full Northbound (NB) and Southbound (SB) Beach Boulevard closures set to continue for falsework construction

Crews are constructing falsework for the widened freeway over Beach Boulevard.

This work requires full NB and SB ramp, lane and Beach Boulevard closures between Center Avenue and the freeway ramps.

This work also includes closing eastbound Center.

Nightly closures are ongoing, 9:30 p.m. to 6 a.m. through Thursday, July 2.

REMINDER! NB I-405 loop off-ramp to Westminster Boulevard closed for ONE YEAR

Crews closed the NB I-405 loop off-ramp to Westminster Boulevard. The ramp will be closed for approximately 12 months to allow construction of new walls and ramps at this location in one stage, eliminating multiple traffic shifts and confusion for motorists.

REMINDER! SB I-405 on-ramp from Edinger Avenue closed for approximately one month

The SB I-405 on-ramp from Edinger is closed for approximately one month,and will be reconstructed as part of the freeway widening.

  • The ramp has been rescheduled to open July 2.

Construction Activities

Talbert Avenue

NEW! Crews are installing piles for the foundation of a wall adjacent to the Talbert bridge.

  • Ongoing, 7 a.m. to 4 p.m. for approximately one more week

East Garden Grove Channel

UPDATE! Crews began removing vegetation, installing steel piles, excavating and demolishing the drainage channel adjacent to the Newland Avenue bridge.

  • Ongoing, 7 a.m. to 4 p.m. for approximately one month
  • Crews may mobilize equipment as early as 6 a.m.
  • Some activities, such as hauling materials, may occur at night

Magnolia Street

UPDATE! Crews are installing piles for the foundation of the new Magnolia bridge.

  • Ongoing, 7 a.m. to 4 p.m. for approximately one month

The duration of this work may change depending on site conditions. Please be advised that this work may be loud. Dates and times are subject to change due to unforeseen operational factors or inclement weather.

This article was released by the Orange County Transportation Authority.